CHAPTER
3
Configuring and Monitoring
from the Hub Manager
This chapter explains how to use the FastHub 400 series Hub Manager on the FastHub
400M models to change the configuration settings and to monitor the hub or hub stack. This
chapter assumes that you have already performed the following tasks described in this
guide or in the FastHub 400 10/100 Series Cabling and Start Up:
•
•
•
“Connecting to the Console Port (FastHub 400M Models)” section on page 2-14
“Assigning IP Information to the Hub (FastHub 400M Models)” section on page 2-16
“Accessing the FastHub 400 Series Hub Manager” section on page 2-21
Note Procedures for changing the configuration settings and detailed descriptions of the
fields are also provided in the hub manager online help.
Configuring and Monitoring from the Hub Manager 3-1
Navigating in the Hub Manager
Navigating in the Hub Manager
At the top of each hub manager page is a menu bar. Figure 3-1 describes the functions of
the pages accessible from the menu bar.
Note On Netscape Communicator only, when the cursor is above a topic on the menu bar,
a pop-up briefly describes the options on that particular page.
Figure 3-1
Hub Manager Menu Bar
Display basic hub description; hub image; define password
Define group parameters
Define SNMP community strings; trap manager parameters
Define console port; upgrade firmware options
Define system-wide hub parameters
Define port parameters; display Switched Uplink Module Management page
3-2
FastHub 400 10/100 Series Installation and Configuration Guide
14524
List neighboring devices;
define Cisco Discovery Protocol parameters
Saving Your Changes
Saving Your Changes
You can change the hub settings by entering information into fields, adding and removing
list items, or selecting and deselecting check boxes. Click Apply to save your changes.
Click Revert to discard all your unsaved changes and return the previous settings to the
page.
Note After you click Apply, you cannot revert to the previous settings.
•
•
When you enter information in fields and select or deselect check boxes, the changes
are saved and immediately take effect after you click Apply.
When you add items to or remove them from lists, the changes take effect immediately.
It is not necessary to click Apply.
Note Wait approximately 30 seconds before turning off the hub to be sure the changes are
saved.
Configuring and Monitoring from the Hub Manager 3-3
Assigning or Changing Basic Hub Information
Assigning or Changing Basic Hub Information
You can assign or change basic descriptions about the hub from the hub manager Home
Page (Figure 3-2). You can also assign a password to the hub management interfaces
(hub manager and CLI-privileged commands) and monitor network activity through the
live hub image. This page also provides a hotlink that opens a Telnet session to the hub
command-line interface (CLI), in addition to hotlinks for contacting Cisco Systems
resources.
Click HOME on the menu bar to display the Home Page (Figure 3-2) and check and
change hub information.
Note This section provides detailed information about this page and procedures on
changing the settings. When you are using the hub manager, click Help from the Home
Page to access this information online.
3-4
FastHub 400 10/100 Series Installation and Configuration Guide
Assigning or Changing the Hub Name and Description
Figure 3-2
Home Page
HOME
PORT GROUP IP SNMP CDP SYSTEM
Initially assigned after the hub
is installed. Can be changed
from the IP Management page.
15364
Procedures and
detailed field
descriptions are
provided here.
Assigning or Changing the Hub Name and Description
You can assign or change the following information about the hub (be sure to click Apply
to save changes):
•
•
•
Name (maximum of 255 characters)
Physical location (maximum of 255 characters)
Name of the person responsible for managing the hub (maximum of 255 characters)
Configuring and Monitoring from the Hub Manager 3-5
Assigning or Changing Basic Hub Information
Assigning or Changing the Hub Password
By default, no password is assigned to the hub management interfaces. You can restrict
access to the hub manager or CLI-privileged commands by assigning a password. If a user
fails to enter the password within a set number of attempts, the hub sends an SNMP trap to
the SNMP trap manager to alert you, via in-band management messages, of the failed
attempts. (For information about trap managers, see the “Changing the SNMP Settings”
section on page 3-34.)
When a password is assigned, the password prompt is displayed when you or any other user
opens a hub manager session and displays the Home Page. The Home Page is redisplayed
only after you enter the correct password. If the password prompt reappears, reenter the
correct password.
To assign or change the password to the hub manager or CLI-privileged commands:
Step 1
Enter a character string (4 to 8 characters, case sensitive) in the Assign/Change
Password field.
Step 2
Enter the same character string in the Reconfirm Password field.
Step 3
Click Apply.
The connection with the hub is broken. The browser prompts you for the new
password.
Step 4
Enter the new password at the password authentication prompt, and click OK.
If you have forgotten or do not know the password, see the “Recovering from a Lost or
Forgotten Password” section on page 4-13.
3-6
FastHub 400 10/100 Series Installation and Configuration Guide
Using the Hub Image to Monitor the Hub
Using the Hub Image to Monitor the Hub
The Home Page displays the front-panel image of the hub (Figure 3-3). The following
sections provide information on how to use the hub image.
Figure 3-3
Hub Image
HOME
PORT GROUP IP SNMP CDP SYSTEM
Shows when another hub is connected
to a stacking connector on the hub rear
panel.
Click the Mode
button to change
the mode that
the LEDs display
for the fixed
10/100 ports.
Click a port to display its
settings, status, and statistics.
Click to display the settings, status, and
statistics of an installed 10BaseT/100BaseTX
or 100BaseFX switched uplink module.
18026
Procedures and
detailed field
descriptions are
provided here.
Note The hub image on the Home Page does not display both the last fixed 10/100
network port and the uplink port (which are ports 12x and 12 on the FastHub 412 models
or ports 24x and 24 on the FastHub 424 models). The last fixed port on the hub image
represents both ports 12x and 12 or ports 24x and 24, depending on the model.
In Figure 3-3, the hub image shows that a 10BaseT/100BaseTX switched uplink module is
installed in the hub.
Configuring and Monitoring from the Hub Manager 3-7
Assigning or Changing Basic Hub Information
SYSTEM and RPS LEDs on the Hub Image
The hub image on the Home Page shows the front-panel LED colors at the last poll interval
and refreshes every 30 seconds. The LEDs show system and RPS status, port status, and
port speed.
Note The hub image does not show the 10 and 100 activity/collision LEDs. To find out if
any of the hub ports are operating at 10 or 100 Mbps, check the actual 10 and 100 LEDs on
the hub, or click the specific port on the image to display the settings on the Port
Management Page.
The SYSTEM LED on the hub image always displays green, showing that the hub is
operating normally. It does not turn amber if a nonfatal POST failure exists. To verify that
there are no nonfatal POST failures, check the actual SYSTEM LED on the hub or use the
Diagnostic Console - Systems Engineering Menu (see the “Using the Diagnostic Console
- Systems Engineering Menu” section on page 4-8).
The colors of the RPS LED on the hub image show the RPS status (Table 3-1).
Table 3-1
3-8
Descriptions of the RPS LED on the Hub Image
LED Color
Description
Blue (off)
Internal power supply is powered up. RPS is not powered up.
Solid green
RPS is powered up and operational. Internal power supply is not powered up.
Flashing green
Internal power supply and RPS are both powered up and the internal power
supply is powering the hub. If the internal power supply fails, the hub powers
down and, after 15 seconds, restarts by using the power from the RPS. The
hub goes through its normal boot sequence when it restarts.
Solid amber
RPS is connected but not functioning properly. One of the power supplies in
the RPS could be powered down or a fan on the RPS could have failed.
FastHub 400 10/100 Series Installation and Configuration Guide
Using the Hub Image to Monitor the Hub
Mode Button and 10/100 Port LEDs on the Hub Image
Click the Mode button on the hub image to change the mode of the port LEDs (Table 3-2).
The default mode for the port LEDs is port status. The colors of the port LEDs on the hub
image display the status or speed of the individual port (Table 3-3). When you select the
port speed mode, the hub remains in that mode for approximately 30 seconds before
returning to the default mode, port status.
Note The hub image does not show the port LEDs in bandwidth-utilization mode (UTL).
Note The hub image on the Home Page does not display both the last 10/100 network port
and the uplink port (ports 12x and 12 on the FastHub 412 models or ports 24x and 24 on
the FastHub 424 models). The LED above port 12 or 24 on the hub image represents both
ports 12x and 12 or ports 24x and 24.
Table 3-2
Changing Between Modes on the Hub Image
For this Mode...
Push the Mode Button Until...
Port status
The STAT LED is green.
100BaseT connections
The SPD LED is green.
Table 3-3
LED Color
Descriptions of the Port LED on the Hub Image
Description
Port Status
Blue (off)
No link.
Solid green
Link operational.
Solid amber
The port is partitioned. After a packet is successfully sent over
this port, the LED is green (normal operating state).
Port Speed
Blue (off)
Port is connected to a 10BaseTX network device.
Green
Port is connected to a 100BaseTX network device.
Configuring and Monitoring from the Hub Manager 3-9
Assigning or Changing Basic Hub Information
Module Port LEDs on the Hub Image
The image also shows if there is a 10BaseT/100BaseTX or 100BaseFX switched uplink
module installed in the rear-panel expansion slot (Figure 3-4). The colors of the LEDs
above the 10BaseT/100BaseTX switched uplink module show port status, duplex mode,
and speed (Table 3-4). The colors of the LEDs above the 100BaseFX switched uplink
module show port status and duplex mode (Table 3-5).
Table 3-4
Descriptions of the 10/100 Module Port LEDs on the Hub Image
LED Color
Description
10/100 Module Port Status (left LED above the module port)
Blue (off)
No link.
Solid green
10BaseT or 100BaseTX link operational.
Flashing green
10BaseT or 100BaseTX link operational (with activity).
10/100 Module Port Duplex Mode (middle LED above the module port)
Blue (off)
Operating at half-duplex mode.
Solid green
Operating at full-duplex mode.
10/100 Module Port Speed (right LED above the module port)
Blue (off)
Operating at 10 Mbps.
Solid green
Operating at 100 Mbps.
Table 3-5
LED Color
Descriptions of the 100BaseFX Module Port LED on the Hub Image
Description
100BaseFX Module Port Status (left LED above the module port)
Blue (off)
No link.
Solid green
100BaseFX link operational.
10/100 Module Port Duplex Mode (right LED above the module port)
3-10
Blue (off)
Operating at half-duplex mode.
Solid green
Operating at full-duplex mode.
FastHub 400 10/100 Series Installation and Configuration Guide
Using the Hub Image to Monitor the Hub
Hub Stack Image
The Home Page displays an image of the hub stack if you have interconnected hubs
(Figure 3-4). The stacking connectors on the stack image is green, showing which stacking
connector on each hub is interconnected to another hub. Otherwise, the stacking connector
is blue (off).
Note Every hub in the stack must be powered up for it to be displayed on the Home Page.
Otherwise, if a hub in the stack is powered down, the stack image shows one less hub in the
stack even if the hub is still interconnected to the stack. However, the image does not show
which specific hub is no longer active. You must check the actual hub stack to find out.
If the stack image does not change after you have removed or added a hub to the stack, click
the browser Reload button to refresh the stack image. Be sure you set the caching of pages
to Every time in Netscape Communicator or Every visit to the page in Microsoft Internet
Explorer.
A radio button appears next to each hub in the stack image. If you click the radio button
next to a specific hub and click PORT from the menu bar, the Port Management Page for
that hub is displayed. The Port Management Page is also displayed when you select the
radio button next to a specific hub on the stack image and then click on a port on that
specific hub image.
By default, the radio button next to the top hub in the stack image is selected, whether the
top hub is a management hub or not.
For more information about hub stacks and managing them, see the “Managing the Hub
Segments” section on page 3-27 and Appendix C, “FastHub Stacks.”
Configuring and Monitoring from the Hub Manager 3-11
Assigning or Changing Basic Hub Information
Figure 3-4
Hub Stack Image
HOME
PORT GROUP IP SNMP CDP SYSTEM
Shows when another hub is connected to a
stacking connector on the hub rear panel.
Click a port to display its
settings, status, and statistics.
Click the Mode
button to change
the mode that
the LEDs display
for the fixed
10/100 ports.
17757
Click to display the settings, status, and
statistics of an installed 10BaseT/100BaseTX
or 100BaseFX switched uplink module.
Note In Figure 3-4, the top hub on the stack image is a management hub, as indicated by
the label “Master,” and is the primary management hub. The third hub in the stack is the
secondary management hub. The second and fourth hubs are not management hubs.
A 10BaseT/100BaseTX switched uplink module is installed in the second hub, and a
100BaseFX switched uplink module is installed in the fourth.
3-12
FastHub 400 10/100 Series Installation and Configuration Guide
Using Telnet to Open a CLI Session
Using Telnet to Open a CLI Session
Click Telnet to open a session on the hub command-line interface (CLI).
Connecting to Cisco Systems’ Resources
The Home Page provides these hotlinks to connect to Cisco Systems’ resources:
•
•
•
Click Cisco Connection Online (CCO) to display the CCO home page
(www.cisco.com), which contains links to the support sites for downloading the latest
software and displaying the latest Cisco documentation.
Click Technical Assistance Center (TAC) to open a new message composition
window to send e-mail to TAC (tac@cisco.com). You can also phone TAC at
800-553-2447 or 408-526-7209.
Click HTML Interface Development Group to open a new message composition
window to send e-mail to the hub manager development group (cs-html@cisco.com).
Configuring and Monitoring from the Hub Manager 3-13
Changing the Port Settings
Changing the Port Settings
By default, each 10/100 network port and the 10/100 uplink port on the hub are enabled to
transmit packets to and receive them from the device to which it is connected, automatically
matching its speed.
Click PORT on the menu bar or click the port on the hub image on the Home Page to
display the Port Management Page (Figure 3-5), check the status of the port, and change
the port settings.
If you have a hub stack, click the radio button next to the specific hub image on the Home
Page, and either click PORT from the menu bar or click the port on the specific hub image.
The Port Management Page displays the port settings for the specific hub.
Note This section provides detailed information about this page and procedures on
changing the settings. When you are using the hub manager, click Help from the Port
Management Page to access this information online.
3-14
FastHub 400 10/100 Series Installation and Configuration Guide
Changing the Port Settings
Figure 3-5
Port Management Page
HOME
PORT GROUP IP SNMP CDP SYSTEM
Displays the
Switched Uplink Module
Management page.
Displays the statistics
for a particular port.
15368
Procedures and
detailed field
descriptions are
provided here.
Shows when the port is operating at 10 or 100 Mbps.
Autonegotiation allows the port to match the speed
of the device to which it is connected.
Shows when the hub has partitioned (separated) the port
from the network. The hub automatically partitions the port if,
for example, there are too many collisions from the connected device.
Shows when the port is able or unable to transmit and receive data.
Configuring and Monitoring from the Hub Manager 3-15
Changing the Port Settings
Enabling or Disabling a Port
By default, all ports are enabled. To disable a port:
Step 1
In the Link Status: Requested/Actual column, deselect the Enable check box.
Step 2
Click Apply.
A linkDown trap is sent to the management station if you configured an SNMP
manager.
To reenable a port:
Step 1
In the Link Status: Requested/Actual column, select the Enable check box.
Step 2
Click Apply.
A linkUp trap is sent to the management station if you configured an SNMP
manager.
Checking the Link and Partition Status
The Link Status: Requested/Actual column displays the actual status of the port. Each port
is always in one of these link states:
Link Up
Port can transmit and receive data.
Link Down
Port is unable to transmit or receive data.
The Partition Status column displays whether or not the port has been partitioned by the
hub, which usually happens as a result of excessive collisions or a network loop. Each port
is always in one of these partition states:
3-16
Partitioned
Port is isolated from the network communications.
Not Partitioned
Port is not isolated from the network communications.
FastHub 400 10/100 Series Installation and Configuration Guide
Changing the Port Transmission Speed
Changing the Port Transmission Speed
By default, the ports automatically match the transmission speed of the attached device. To
change the port speed:
Step 1
From the Speed: Requested/Actual drop-down list, select 10 Mbps, 100 Mbps,
or Auto (autonegotiate). The default is Auto.
Step 2
Click Apply.
Note If the other device does not autonegotiate, the hub port automatically negotiates to
10 Mbps.
Assigning or Changing a Port Name or Description
To assign a name or description to a port:
Step 1
In the Port Name/Description column, enter the port name or a description
(up to 20 characters) of how the port is connected.
Step 2
Click Apply.
Displaying the Switched Uplink Module Management Page
Click Switched Uplink Module to display this page.
Configuring and Monitoring from the Hub Manager 3-17
Changing the Port Settings
Checking or Resetting Port Statistics
From the Port Management Page, select a port, and click View to see the statistics for a
particular port on the hub. The Detailed Port Statistics Page (Figure 3-6) for the selected
port displays the port statistics. Table 3-6 lists the statistics displayed on the page.
Click Reset Port Statistics to reset the statistics.
The hub manager does not automatically refresh the statistics shown on this page. Click
Reload to refresh the statistics shown on this page.
Figure 3-6
Detailed Port Statistics Page
HOME
PORT GROUP IP SNMP CDP SYSTEM
15369
Procedures and
detailed field
descriptions are
provided here.
Refreshes the statistics
displayed on this page.
3-18
Resets the statistics
for the port.
FastHub 400 10/100 Series Installation and Configuration Guide
Checking or Resetting Port Statistics
Table 3-6
Error Descriptions on the Detailed Port Statistics Page
Packets
Total number of packets received by the port.
Bytes
Total number of bytes received by the port.
FCS Errors
Number of frame check sequence (FCS) errors indicating that frames
of data are being corrupted during transmission.
Alignment Errors
Number of alignment errors (caused if all bytes are not received
whole) received by the port.
Packets Too Long
Number of packets received by the port that exceed the maximum size
for IEEE 802.3 frames.
Short Events
Number of packets received by the port that are smaller than runts,
which are smaller than the minimum size for IEEE 802.3 packets.
Packets Too Short
Number of frames received by the hub that are smaller than the
minimum size for IEEE 802.3 frames.
Collisions
Number of times the hub and the connected device attempt to transmit
at the same time.
Late Events
Number of frames that experienced a collision late in transmission.
Very Long Events
Number of packets that exceed the maximum length prescribed in
IEEE 802.3.
Data Rate Mismatches
Number of frames whose timing no longer matches the transmit
frequency between the hub and the connected device.
Autopartitions
Number of times the port automatically partitions the segments
attached to it.
Total Errors
Total number of errors received by the port.
Configuring and Monitoring from the Hub Manager 3-19
Changing the Module Port Settings
Changing the Module Port Settings
If you have an optional switched uplink module installed in the rear-panel expansion slot
on the hub, you can manage the module port as you would the 10/100 network and uplink
ports.
Click PORT on the menu bar, and click Switched Uplink Module from the Port
Management Page to display the Switched Uplink Module Management Page (Figure 3-7)
and check and change the settings. You can also click the module port on the hub image on
the Home Page to display the Switched Uplink Module Management Page.
Note This section provides detailed information about this page and procedures on
changing the settings. When you are using the hub manager, click Help on the Switched
Uplink Module Management Page to access this information online.
For more information about the switched uplink modules, see Appendix D, “Switched
Uplink Modules.”
3-20
FastHub 400 10/100 Series Installation and Configuration Guide
Changing the Module Port Settings
Figure 3-7
Switched Uplink Module Management Page
HOME
PORT GROUP IP SNMP CDP SYSTEM
Shows on which
hub in the stack
the module is
installed.
Displays the statistics
for a particular module.
Shows when the port is
able or unable to transmit
and receive data.
Shows if the hub has a
10BaseT/100BaseTX or 100BaseFX
switched uplink module installed.
15367
Procedures and
detailed field
descriptions are
provided here.
Shows when the module port is operating at halfor full-duplex mode. Autonegotiation allows the
module port to match the duplex mode of the
device to which it is connected.
Shows when the module port is operating at 10 or 100 Mbps.
Autonegotiation allows the 10BaseT/100BaseTX module port
to match the speed of the device to which it is connected.
Speed negotiation is not applicable to the 100BaseFX module port.
Note Figure 3-7 shows the Switched Uplink Module Management Page. This example
shows that hubs 1, 3, and 4 have modules installed. Hub 2 is powered down but still
interconnected to the stack.
Configuring and Monitoring from the Hub Manager 3-21
Changing the Module Port Settings
Enabling or Disabling the Module Port
By default, the module port is enabled. To disable the module port:
Step 1
In the Status: Requested/Actual column, deselect the Enable check box.
Step 2
Click Apply.
A linkDown trap is sent to the management station if you configured an SNMP
manager.
To reenable the module port:
Step 1
In the Status: Requested/Actual column, select the Enable check box.
Step 2
Click Apply.
A linkUp trap is sent to the management station if you configured an SNMP
manager.
Checking the Module Port Status
The Status: Requested/Actual column displays the actual status of the module port. The
module port is always in one of these link states:
Link Up
Port can transmit and receive data.
Link Down
Port is unable to transmit or receive data.
Checking the Type of Module Installed
The Medium column displays the type of switched uplink module installed in the hub:
3-22
10BaseT/100BaseTX
10BaseT/100BaseTX switched uplink module is installed.
100BaseFX-SC
100BaseFX switched uplink module is installed.
FastHub 400 10/100 Series Installation and Configuration Guide
Changing the Module Port Transmission Speed
Changing the Module Port Transmission Speed
By default, the 10BaseT/100BaseTX module port automatically matches the transmission
speed of the attached device. To change the module port transmission speed:
Step 1
From the Speed: Requested/Actual drop-down list, select 10 Mbps, 100 Mbps,
or Auto (autonegotiate).
The default is Auto. The 10-Mbps and Auto options are available only to the
10BaseT/100BaseTX module port.
Step 2
Click Apply.
Note If the other device does not autonegotiate, the hub port automatically negotiates to
10 Mbps. Speed negotiation does not apply to the 100BaseFX switched uplink module.
Changing the Module Port Duplex Mode
Full-duplex operation is simultaneous transmission of data in both directions across a link.
For example, a 100BaseTX switched port operating in full-duplex mode can provide up to
200 Mbps of bandwidth across the switched link.
When autonegotiation is selected on the module port, it automatically configures for
full-duplex operation if the connected device also supports full duplex. If the attached
device does not support full-duplex operation, the module port automatically configures to
half-duplex operation.
To change the module port duplex mode:
Step 1
From the Duplex Mode: Requested/Actual drop-down list, select Half, Full, or
Auto (autonegotiate).
The default for the 10BaseT/100BaseTX module port is Auto. The default for
the 100BaseFX module port is Half.
Step 2
Click Apply.
Note If the other device does not autonegotiate, the hub port automatically negotiates to
half duplex.
Configuring and Monitoring from the Hub Manager 3-23
Changing the Module Port Settings
Assigning or Changing a Module Port Name or Description
To assign a name or description to a module port:
Step 1
In the Port Name/Description column, enter the port name or a description
(up to 20 characters) of how the module port is connected.
Step 2
Click Apply.
Checking or Resetting Module Statistics
From the Switched Uplink Module Management Page, select the hub on which the module
is installed, and click View to see the statistics of the module. The Detailed Switched
Uplink Module Statistics Page (Figure 3-8) displays the module statistics. Table 3-7 lists
the statistics displayed on the page.
Click Reset Switched Uplink Module Statistics to reset the statistics.
The hub manager does not automatically refresh the statistics shown on this page. Click
Reload to refresh the statistics shown on this page.
3-24
FastHub 400 10/100 Series Installation and Configuration Guide
Checking or Resetting Module Statistics
Figure 3-8
Detailed Switched Uplink Module Statistics Page
HOME
PORT GROUP IP SNMP CDP SYSTEM
17609
Procedures and
detailed field
descriptions are
provided here.
Refreshes the statistics
displayed on this page.
Resets the statistics for
the switched uplink module.
Configuring and Monitoring from the Hub Manager 3-25
Changing the Module Port Settings
Table 3-7
3-26
Error Descriptions on the Detailed Switched Uplink Module
Statistics Page
Total Bytes Received
Total number of bytes received by the port.
Total Packets Received
Total number of packets received by the port.
Broadcast Packets Received
Total number of broadcast packets received by the port.
Multicast Packets Received
Total number of multicast packets received by the port.
CRC/Alignment Errors
Number of frames received by the port that are not an integral
number of octets in length and do not pass the frame check
sequence (FCS) test.
Undersize Packets
Number of packets less than 64 bytes received by the port.
Oversize Packets
Number of packets longer than 1518 bytes received by the port.
Fragments
Number of SMT packets received by the port.
Very Long Events
Number of packets that exceed the maximum length prescribed
in IEEE 802.3.
Collisions
Number of times the port and the connected device attempt to
transmit at the same time.
64-Byte Packets
65-127-Byte Packets
128-255-Byte Packets
256-511-Byte Packets
512-1023-Byte Packets
1024-1518-Byte Packets
Number of packets received in these lengths in bytes.
FastHub 400 10/100 Series Installation and Configuration Guide
Managing the Hub Segments
Managing the Hub Segments
You can interconnect up to four FastHub 400 models (a maximum of 96 ports) and manage
that hub stack as a single logical repeater. To provide management to the stack, the stack
must include at least one FastHub 412M or FastHub 424M hub. You can have a second
management hub in the stack to act as a redundant stack manager in case the primary
manager fails. For complete information and guidelines on stacking hubs, see Appendix C,
“FastHub Stacks.”
By default, each hub in the stack is connected to the network. Click GROUP on the menu
bar to display the Group Management Page (Figure 3-9), isolate a hub from the network,
and display the statistics of each hub in the stack.
Note This section provides detailed information about this page and procedures on
changing the settings. When you are using the hub manager, click Help from the Group
Management Page to access this information online.
Figure 3-9
Group Management Page
HOME
PORT GROUP IP SNMP CDP SYSTEM
Procedures and
detailed field
descriptions are
provided here.
• Isolates a particular hub
from the network.
• Connects a particular hub
to the network.
15362
Displays the statistics
for a particular hub.
Identifies the hubs in the stack.
The hub physically located at
the top of the stack is Group 1.
Note Figure 3-9 shows the Group Management Page when there are at least two hubs in
the stack.
Configuring and Monitoring from the Hub Manager 3-27
Managing the Hub Segments
This page displays the number of active hubs (groups) in the hub stack. Group 1 always
represents the hub at the top of the stack, and the hub below Group 1 is Group 2, and so on.
If you remove a hub from the stack, this page automatically renumbers the hubs
accordingly.
Note Every hub in the stack must be powered up for it to be displayed on the Home Page
and on the Group Management Page. Otherwise, if a hub in the stack is powered down, the
stack image shows one less hub in the stack even if the hub is still interconnected to the
stack. However, the image does not show which specific hub is no longer active. You must
check the actual hub stack to find out.
If the stack image does not change after you have removed or added a hub to the stack, click
the browser Reload button to refresh the stack image. Be sure you set the caching of pages
to Every time in Netscape Communicator or Every visit to the page in Microsoft Internet
Explorer.
If a hub stack has more than one management hub, the upper management hub in the stack
is the primary management hub. The lower management hub is the secondary management
hub.
To manage the hub stack, you can use the system information (such as the IP, CDP, and
SNMP information) assigned to the primary management hub. The primary management
hub also stores the port settings of each hub in the stack. If the primary management hub
becomes inactive or is disconnected from the stack, the secondary management hub
becomes the primary management hub and uses the same stack information.
•
•
If a stack has only one management hub and another management hub is added to the
stack, the system information from the management hub that has the longest system-up
time is used by the topmost management hub. This happens if the new management hub
is added either above or below the preexisting management hub.
If you replace the only management hub in the stack with a different management hub,
the stack will use the settings of the newly installed management hub.
Note If you have a stack that has two management hubs and you remove one management
hub from the stack, it will have the same IP address as the stack. Avoid IP conflict by
changing the IP address of the removed management hub before you reuse it and connect
it to another hub stack in the network.
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FastHub 400 10/100 Series Installation and Configuration Guide
Connecting or Isolating a Hub Segment
Connecting or Isolating a Hub Segment
By default, each hub in the stack is connected to the network. To isolate a hub from the
network:
Step 1
Select Isolated from the Isolation Status drop-down list.
You can use the Isolated option if you need to troubleshoot a specific hub in the
stack and do not want to affect the devices to which that particular hub is
connected.
When you isolate a hub, keep the following considerations in mind:
•
•
•
If you isolate a hub in the stack, the hubs above and below the isolated hub
will still communicate with each other as long as the isolated hub is
interconnected to the stack.
If you isolate a hub in the stack other than the primary management hub, and
your management station is not connected to the isolated hub, the Home Page
will display the stack image, including the isolated hub. You can still manage
the stack, including the isolated hub, from the hub manager.
If your hub stack has only one management hub and you isolate that
management hub, the Home Page will display only the image of the
management hub (not the stack image). You will not be able to manage the
stack from the hub manager.
Note If you do not isolate a hub and if you keep it interconnected to the stack
but only power down that hub, the hubs above and below that powered-down hub
will still communicate with each other. However, you will not be able to manage
that hub, and it will not be displayed from the hub manager.
Step 2
Click Apply.
To reconnect an isolated hub to the network:
Step 1
Select Connected from the Isolation Status drop-down list.
Step 2
Click Apply.
Configuring and Monitoring from the Hub Manager 3-29
Managing the Hub Segments
Checking or Resetting Hub Statistics
From the Group Management Page, select the hub, and click View to see the statistics of a
single hub or a hub in the hub stack. The Detailed Group Statistics Page (Figure 3-10) for
the hub (group) you selected displays the hub statistics. Table 3-8 lists the statistics
displayed on the page.
Click Reset Group Statistics to reset the statistics.
The hub manager does not automatically refresh the statistics shown on this page. Click
Reload to refresh the statistics shown on this page.
Figure 3-10
Detailed Group Statistics Page
HOME
PORT GROUP IP SNMP CDP SYSTEM
15363
Procedures and
detailed field
descriptions are
provided here.
Refreshes the statistics
displayed on this page.
3-30
Resets the statistics
for a particular hub.
FastHub 400 10/100 Series Installation and Configuration Guide
Checking or Resetting Hub Statistics
Table 3-8
Error Descriptions on the Detailed Group Statistics Page
Packets
Total number of packets received by the port.
Bytes
Total number of bytes received by the port.
FCS Errors
Number of frame check sequence (FCS) errors indicating that frames
of data are being corrupted during transmission.
Alignment Errors
Number of alignment errors (caused if all bytes are not received
whole) received by the port.
Packets Too Long
Number of packets received by the port that exceed the maximum size
for IEEE 802.3 frames.
Short Events
Number of packets received by the port that are smaller than runts,
which are smaller than the minimum size for IEEE 802.3 packets.
Packets Too Short
Number of frames received by the hub that are smaller than the
minimum size for IEEE 802.3 frames.
Collisions
Number of times the hub and the connected device attempt to transmit
at the same time.
Late Events
Number of frames that experienced a collision late in transmission.
Very Long Events
Number of packets that exceed the maximum length prescribed in
IEEE 802.3.
Data Rate Mismatches
Number of frames whose timing no longer matches the transmit
frequency between the hub and the connected device.
Autopartitions
Number of times the port automatically partitions the segments
attached to it.
Total Errors
Total number of errors received by the port.
Configuring and Monitoring from the Hub Manager 3-31
Changing the Hub IP Information
Changing the Hub IP Information
IP information identifies the hub (or managed hub stack) to the network and is necessary to
manage the hub (or hub stack) through the hub manager, the CLI, or SNMP. This
information is usually assigned to the management hub after it is installed and initially
started up. (See the “Assigning IP Information to the Hub (FastHub 400M Models)” section
on page 2-16.)
The IP Address field displays the current IP address of the hub. Click IP on the menu bar
to display the IP Management Page (Figure 3-11) and change hub IP information.
Note If you have a stack that has two management hubs and you remove one management
hub from the stack, it will have the same IP address as the stack. Avoid IP conflict by
changing the IP address of the removed management hub before you reuse it and connect
it to another hub stack in the network. For complete information and guidelines on
managing hub stacks, see the “Managing the Hub Segments” section on page 3-27 and the
“Managing a Hub Stack” section on page C-6.
Note This section provides detailed information about this page and procedures on
changing the settings. When you are using the hub manager, click Help on the IP
Management Page to access this information online.
Figure 3-11
IP Management Page
HOME
PORT GROUP IP SNMP CDP SYSTEM
Procedures and
detailed field
descriptions are
provided here.
3-32
• BootP Get IP enables the hub to automatically
assign hub IP information if it is connected to
a network with a BootP server. When enabled,
this option does not allow hub IP information to
be manually changed.
FastHub 400 10/100 Series Installation and Configuration Guide
15366
• User-Configured allows you to manually change
the hub IP information. The IP address and
subnet mask must be in the same subnet.
Changing the Hub IP Information
Caution Changing the hub IP address on this page will end your hub manager session. To
open a new session, enter the new IP address in the URL field if you are using
Communicator (the Address field if you are using Internet Explorer).
To manually change the hub IP information:
Step 1
Select User-Configured from the IP State drop-down list.
Note You can manually change the hub IP information only if the
User-Configured option is enabled.
Note Use the BootP Get IP option if you want the BootP (Boot Protocol) server
to assign the IP information. The hub must be connected to a network that has a
BootP server. The BootP Get IP option becomes active when you restart the hub.
If this option is enabled, you cannot manually change IP information.
The default is User-Configured.
Step 2
Enter a new IP address for the hub in the IP Address field.
Caution If you enter a new address and click Apply, the hub manager loses contact with
the hub. Enter the new IP address of the hub in the Location field if you are using
Communicator (the Address field if you are using Internet Explorer) to redisplay the hub
manager.
Step 3
Enter the subnet mask for the hub.
The subnet mask must be in the same subnet as the IP address.
Step 4
Enter the IP address of the default gateway.
The default gateway is the router that the hub uses to reach IP subnets other than
the local subnet to which the hub is attached.
Step 5
Click Apply.
Configuring and Monitoring from the Hub Manager 3-33
Changing the SNMP Settings
Changing the SNMP Settings
SNMP provides the means to manage and monitor the hub (or managed hub stack) through
the Management Information Base (MIB) objects. Additional information about SNMP
and MIB objects is provided in the “Overview of SNMP” section on page 1-17 and the
“Accessing the MIB Files through SNMP” section on page 2-23.
Click SNMP on the menu bar to display the SNMP Management Page (Figure 3-12) and
check and change the SNMP settings.
Note This section provides detailed information about this page and procedures on
changing the settings. When you are using the hub manager, click Help on the SNMP
Management Page to access this information online.
Figure 3-12
SNMP Management Page
HOME
PORT GROUP IP SNMP CDP SYSTEM
Passwords that allow read-only
(Get requests) and read-write
(Set requests) access to the
hub MIB-object information.
Procedures and
detailed field
descriptions are
provided here.
Up to four management
stations can receive traps
(alerts of certain events)
generated by the hub.
Use the traps to monitor
the hub.
15370
Up to four management stations can issue
write requests to change the hub configuration
settings through the MIB variables.
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FastHub 400 10/100 Series Installation and Configuration Guide
Changing the SNMP Read and Write Community Strings
Changing the SNMP Read and Write Community Strings
Community strings serve as passwords for SNMP messages. You can assign community
strings that enable the hub to validate SNMP read and read-write requests from a
management station.
To change the SNMP Read community string:
Step 1
Enter up to 32 characters in the Read Community String field. The default is
public.
Step 2
Click Apply.
To change the SNMP Write community string:
Step 1
Enter up to 32 characters in the Write Community String field. The default is
private.
Step 2
Click Apply.
Assigning or Changing Trap Managers
A trap manager is an SNMP management station that receives traps, which are the system
alerts generated by the hub. If no trap manager is defined, no traps are issued. Up to four
trap managers and their accompanying community strings can be entered.
To assign a trap manager:
Step 1
Enter the IP address and a community string (up to 32 characters) in the IP
Address and Trap Manager Community String fields.
Step 2
Click Add.
To remove a trap manager:
Step 1
Select the manager from the Current list.
Step 2
Click Remove.
Configuring and Monitoring from the Hub Manager 3-35
Changing the SNMP Settings
Enabling or Disabling Trap Generation
By default, the Enable Authentication Trap Generation check box is selected (meaning this
parameter is enabled). When this check box is selected, the hub generates authentication
traps that alert a management station to SNMP requests that are not accompanied by a valid
community string. However, even if this parameter is enabled, no trap can be generated if
no trap manager addresses are specified. (For information about trap manager settings, see
the “Assigning or Changing Trap Managers” section on page 3-35). If you change this
check box, click Apply to save your changes.
By default, the Enable Link Up/Link Down Trap Generation check box is selected
(meaning this parameter is enabled). If you change this check box, click Apply to save your
changes.
The hub generates linkDown traps when a port is suspended or disabled for these reasons:
•
•
User disables the port.
Link is down.
The hub generates linkUp traps when a port is enabled for these reasons:
•
•
Presence of linkbeat.
Management intervention enables the port.
Assigning or Changing Write Managers
A write manager is an SNMP management station that can issue write requests to the hub.
Up to four IP addresses of stations can be defined.
To assign a write manager:
Step 1
Enter the management station IP address in the IP Address field.
Step 2
Click Add.
To remove a write manager:
3-36
Step 1
Select the manager from the Current list.
Step 2
Click Remove.
FastHub 400 10/100 Series Installation and Configuration Guide
Changing the CDP Settings
Changing the CDP Settings
The Cisco Discovery Protocol (CDP) enables the hub (or managed hub stack) to advertise
its existence to other Cisco devices in the network. When CDP is enabled, the hub manager
and network management applications have an accurate picture of the network at any time
because CDP gathers information about device types, links between devices, and the
number of interfaces within each device.
By default, the hub is CDP-enabled. Click CDP on the menu bar to display the CDP
Management Page (Figure 3-13) and check and change the CDP settings.
Note This section provides detailed information about this page and procedures on
changing the settings. When you are using the hub manager, click Help on the CDP
Management Page to access this information online.
Figure 3-13
CDP Management Page
HOME
PORT GROUP IP SNMP CDP SYSTEM
Opens the web console of
a connected neighboring device.
Allow or not
allow exchanging
CDP messages
between the hub
and other
Cisco devices.
Opens a Telnet session and logs you
into a connected neighboring device.
Displays detailed information about
a connected neighboring device.
Length of time a neighboring device retains
CDP information it received from this hub.
The packet hold time should be higher than
the packet transmission time.
15361
Procedures and
detailed field
descriptions are
provided here.
Length of time between transmissions of
CDP mesages. The packet transmission time
should be lower than the packet hold time.
Configuring and Monitoring from the Hub Manager 3-37
Changing the CDP Settings
Displaying CDP Neighbors
The Discovered Neighboring Devices list shows the devices with which the hub exchanges
CDP messages. To display information about neighboring devices:
Step 1
From the Discovered Neighboring Devices list, select a device.
Step 2
Click one of these buttons:
•
•
•
Click Browse to access the web console of a neighboring device. The
neighbor must be a device that has web-console support.
Click Telnet to open a Telnet session and log into a neighboring device.
Click Details to display the detailed CDP information currently stored in the
hub.
Enabling and Disabling CDP
By default, CDP is enabled on the hub. If you do not want the hub to exchange information
with Cisco devices, you can disable CDP on the hub. To disable CDP:
Step 1
Deselect the Enable CDP check box.
Step 2
Click Apply.
To reenable CDP:
3-38
Step 1
Select the Enable CDP check box.
Step 2
Click Apply.
FastHub 400 10/100 Series Installation and Configuration Guide
Changing the CDP Settings
Changing the CDP Settings
To change the global CDP settings for the hub:
Step 1
In the Packet Hold Time field, enter the number of seconds (between 10 and 255)
that a neighboring device retains the CDP neighbor information received from
this hub. The default setting is 180 seconds.
If a neighboring device does not receive a CDP message before the hold time
expires, the device drops this hub as a neighbor. The packet hold time should be
higher than the packet transmission time.
Step 2
In the Packet Transmission Time field, enter the number of seconds
(between 5 and 900) between transmissions of CDP messages. The default is
60 seconds. The packet transmission time should be lower than the packet hold
time.
Step 3
Click Apply.
Configuring and Monitoring from the Hub Manager 3-39
Changing the System Configuration
Changing the System Configuration
Cisco periodically provides new firmware to implement enhancements and maintenance
releases. New firmware releases can be downloaded from Cisco Connection Online (CCO),
the Cisco Systems’ customer web site available at the following URLs: www.cisco.com,
www-china.cisco.com, and www-europe.cisco.com.
The Firmware Version field displays the firmware version in use. You can download the
latest hub firmware from a TFTP server.
Note When you download the firmware permanently to Flash memory, the hub does not
respond to commands for approximately 1 minute. This is normal and correct. Do not turn
off the hub. The hub then resets and begins using the new firmware.
Caution If you interrupt the transfer by turning the hub off and on, the firmware could get
corrupted. For recovery procedures, see the “Recovering from Corrupted Firmware”
section on page 4-10.
If you want to upgrade the firmware of the management hub, click SYSTEM on the menu
bar to display the System Configuration Page (Figure 3-14).
Note This section provides detailed information about this page and procedures on
changing the settings. When you are using the hub manager, click Help on the System
Configuration Page to access this information online.
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FastHub 400 10/100 Series Installation and Configuration Guide
Changing the System Configuration
System Configuration Page
HOME
Procedures and
detailed field
descriptions are
provided here.
PORT GROUP IP SNMP CDP SYSTEM
Before downloading the upgrade file to the hub via
XMODEM protocol, make sure the settings of the
hub console port and management station match.
Displays the firmware version
used by the hub.
• Permanently downloads the new
firmware to Flash memory.
• Temporarily downloads the new firmware to
DRAM. After a power cycle, the hub uses the
previous firmware version.
15371
Figure 3-14
Configuring and Monitoring from the Hub Manager 3-41
Changing the System Configuration
Configuring the Hub Console Port
The console port on the hub provides terminal and PC access to the hub. After the hub is
installed, be sure to configure the console port settings of the hub to match the settings of
the terminal or PC.
These are the default settings of the hub console port:
•
•
Baud rate default is 9600.
Data bits default is 8.
Note If data bits is 8, set parity to None.
•
•
Stop bits default is 1.
Parity settings default is None.
If you change any of these settings, click Apply to save your changes.
Changing the CLI Inactivity Timeout Setting
You can change the number of seconds that the CLI can wait without activity before it times
out. After timeout, you must reenter the password.
To change the inactivity timeout parameter:
3-42
Step 1
Enter the number of seconds (0, or 30 to 65500) in the CLI Inactivity Timeout
field. The default is 0 (which means the console session does not time out).
Step 2
Click Apply.
FastHub 400 10/100 Series Installation and Configuration Guide
Upgrading the Hub Firmware
Upgrading the Hub Firmware
The Firmware Version field displays the firmware version used by the hub. You can upgrade
the firmware by following these steps to download the latest firmware from a TFTP server
to your hub:
Step 1
In the Server IP Address field, enter the IP address of the TFTP server on which
the upgrade file is located.
Step 2
Enter the upgrade filename (up to 80 characters) in the Filename for Firmware
Upgrades field.
Step 3
Select one of these download modes:
•
•
Permanent to download the firmware to Flash memory.
Temporary to download the firmware to DRAM. Use this option to test the
new firmware before overriding the previous firmware. After a power cycle,
the hub discards the new firmware and uses the previous firmware.
The default is Permanent.
Step 4
Click System TFTP Upgrade to download the upgrade file from the TFTP
server to the hub.
Step 5
Click OK on the confirmation prompt.
Note When you download the firmware permanently to Flash memory, the hub does not
respond to commands for approximately 1 minute. This is normal and correct. Do not turn
off the hub. The hub then resets and begins using the new firmware.
Caution If you interrupt the transfer by turning the hub off and on, the firmware could get
corrupted. For recovery procedures, see the “Recovering from Corrupted Firmware”
section on page 4-10.
Configuring and Monitoring from the Hub Manager 3-43
Changing the System Configuration
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FastHub 400 10/100 Series Installation and Configuration Guide