VP Tunnels and VP Switching
Some Concepts
VP Switching
Switching decision is made solely based on VPI number (unlike both VPI and VCI for
VC switching) which reduces administration as well as allows for faster switching of cells.
VP Tunnels
VP interface is a multiplexing/demultiplexing point on ATM switch at which VC’s
from various (ATM interfaces) are aggregated to VP on an Interface.
VP’s are ATM connections that are aggregate of multiple VC’s that all have same VPI
number.
VP’s are most often used across WANs.
VP Tunnels and VP Switching
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1
VP Tunnels and VP Switching
There are 2 major type of ATM connections
1- VC (Virtual Channel): VC’s are uniquely identified on port of ATM switch by VPI and VCI number.
2- VP (Virtual Path): VP’s are uniquely identified on ATM port by VPI number on ATM port.
Virtual Path
VC
VP
VP
VC
Transmission Path
VC
VP
VP
VC
ATM cells arriving on VC are switched based
on both VPI and VCI number in cell header.
On other hand ATM cells arriving on VP are
Switched based on VPI number only.
Configuration of ATM switch will determine
If switch is supposed to be VC or VP switching
For specific VPI/VCI pair or VPI respectively.
VP Tunnels and VP Switching
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VP Tunnels and VP Switching
VC and VP Switching
Port
1
1
2
VPI/VCI
2/100
2/110
5/110
Port
4
3
4
VPI/VCI
7/110
1/50
7/100
OR
Port
1
2
VPI
2
5
Port
4
3
VPI
7
1
VCI 100
VCI 110
VPI 2
Port 1
Port 3
VPI 1
VCI 50
VCI 110
VPI 5
Port 2
Port 4
VPI 7
VCI 100
VCI 110
•A cell is switch at VC or VP level.
•VC Switching - Switch receive a cell with a configured VPI and VCI, it lookup its connection table to
determine outgoing port (or ports) with new VPI/VCI value.
VP Tunnels and VP Switching
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VP Tunnels and VP Switching
Configuring VP Switching
Atm5/1/0
Atm0/0/1
Atm0/0/0
Atm0/0/0
Atm0/0/1
Atm0/0/0
interface ATM5/1/0
interface ATM0/0/1
interface ATM0/0/1
interface ATM0/0/0
no ip address
no ip address
no ip address
no ip address
no atm ilmi-keepalive
atm pvp 10 interface ATM0/0/0 10
atm pvp 10 interface ATM0/0/0 10
no atm ilmi-keepalive
atm pvp 12 interface ATM0/0/0 11
!
!
interface ATM5/1/0.1 point-to-point
ip address 1.1.1.1 255.255.255.0
interface ATM0/0/0.1 point-to-point
atm pvp 11 interface ATM0/0/0 11
ip address 1.1.1.2 255.255.255.0
pvc 10/20
pvc 10/20
encapsulation aal5snap
encapsulation aal5snap
!
!
interface ATM5/1/0.2 point-to-point
interface ATM0/0/0.2 point-to-point
ip address 2.1.1.1 255.255.255.0
ip address 2.1.1.2 255.255.255.0
pvc 10/30
Check this out
pvc 10/30
encapsulation aal5snap
encapsulation aal5snap
!
!
interface ATM5/1/0.3 point-to-point
interface ATM0/0/0.3 point-to-point
ip address 3.1.1.1 255.255.255.0
ip address 3.1.1.2 255.255.255.0
pvc 11/40
pvc 12/40
VP Tunnels and VP Switching
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encapsulation aal5snap
4
VP Tunnels and VP Switching
Show Commands for VP Switching
VP Tunnels and VP Switching
Switch#sh atm vp
Interface
VPI Type X-Interface
ATM0/0/0
10
PVP ATM0/0/1
ATM0/0/0
11
PVP ATM0/0/1
ATM0/0/1
10
PVP ATM0/0/0
ATM0/0/1
12
PVP ATM0/0/0
X-VPI
10
12
10
11
Switch#sh atm vp traffi int atm0/0/0
Interface
VPI Type
rx-cell-cnts
ATM0/0/0
10 PVP
70
ATM0/0/0
11 PVP
94
tx-cell-cnts
60
90
© 2001, Cisco Systems, Inc.
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Status
UP
UP
UP
UP
5
VP Tunnels and VP Switching
Switch#sh atm vp int atm0/0/0 10
Show Commands for VP Switching
VP Tunnels and VP Switching
© 2001, Cisco Systems, Inc.
Interface: ATM0/0/0, Type: oc3suni
VPI = 10
Status: UP
Time-since-last-status-change: 00:58:11
Connection-type: PVP
Cast-type: point-to-point
Cross-connect-interface: ATM0/0/1, Type: oc3suni
Cross-connect-VPI = 10
Rx connection-traffic-table-index: 1
Rx service-category: UBR (Unspecified Bit Rate)
Rx pcr-clp01: 7113539
Rx scr-clp01: none
Rx mcr-clp01: none
Rx
cdvt: 1024 (from default for interface)
Rx
mbs: none
Tx connection-traffic-table-index: 1
Tx service-category: UBR (Unspecified Bit Rate)
Tx pcr-clp01: 7113539
Tx scr-clp01: none
Tx mcr-clp01: none
Tx
cdvt: none
Tx
mbs: none
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VP Tunnels and VP Switching
Three different types of VP Tunnels on Cisco Enterprise ATM Switches
1- Regular or Unshaped VP Tunnels
2- Shaped VP Tunnels
3- Hierarchical VP Tunnels
VP Tunnels and VP Switching
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VP Tunnels and VP Switching
Regular or Unshaped VP Tunnels
VP tunnels on which there is no traffic shaping for any ATM service category. VP can
be of any service category but can’t be shaped. VC’s in a tunnel have to be of same
service category VP tunnel is.
VP Tunnels and VP Switching
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VP Tunnels and VP Switching
Configuring VP Tunnels for a Single Service Category
Tunnel
WAN
Tunnel
Atm5/1/0 Atm0/0/1
Atm0/0/0
Public PVP
Router 1
interface ATM5/1/0.1 point-to-point
ip address 1.1.1.1 255.255.255.0
pvc 100/32
encapsulation aal5snap
!
interface ATM5/1/0.2 point-to-point
ip address 2.1.1.1 255.255.255.0
pvc 100/33
encapsulation aal5snap
VP Tunnels and VP Switching
Switch 1
Switch 2
Atm0/0/1
Atm0/0/0
Atm0/0/0
Router 2
interface ATM0/0/0.1 point-to-point
ip address 1.1.1.2 255.255.255.0
pvc 100/32
encapsulation aal5snap
!
interface ATM0/0/0.2 point-to-point
ip address 2.1.1.2 255.255.255.0
pvc 100/40
encapsulation aal5snap
!
interface ATM0/0/0
interface ATM0/0/0
no ip address
no ip address
atm pvp 100
atm pvp 100
!
!
interface ATM0/0/0.100 point-to-point
interface ATM0/0/0.100 point-to-point
no ip directed-broadcast
!
no atm ilmi-keepalive
interface ATM0/0/1
!
no ip address
interface ATM0/0/1
atm pvc 100 32 interface ATM0/0/0.100 100 32
no ip address
atm pvc 100 40 interface ATM0/0/0.100 100 33
no ip directed-broadcast
!
logging event subif-link-status
atm ilmi-keepalive
atm svcc vci min 100
atm pvc 100 32 interface ATM0/0/0.100 100 32
atm pvc 100 33 interface ATM0/0/0.100 100 33
!
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VP Tunnels and VP Switching
Switch#sh atm vp int atm 0/0/0 100
Show Commands for VP
VP Tunnels and VP Switching
© 2001, Cisco Systems, Inc.
Interface: ATM0/0/0, Type: oc3suni
VPI = 100
Status: TUNNEL
Time-since-last-status-change: 17:21:32
Connection-type: PVP
Tunnels Cast-type: point-to-point
Rx cells: 49968, Tx cells: 50371
Rx connection-traffic-table-index: 1
Rx service-category: UBR (Unspecified Bit Rate)
Rx pcr-clp01: 7113539
Rx scr-clp01: none
Rx mcr-clp01: none
Rx
cdvt: 1024 (from default for interface)
Rx
mbs: none
Tx connection-traffic-table-index: 1
Tx service-category: UBR (Unspecified Bit Rate)
Tx pcr-clp01: 7113539
Tx scr-clp01: none
Tx mcr-clp01: none
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10
Tx
cdvt: none
VP Tunnels and VP Switching
Show Commands for VP Tunnels
Switch#sh atm vp
Interface
VPI Type X-Interface
ATM0/0/0
100 PVP TUNNEL
Switch#sh atm vp traffic int atm0/0/0
Interface
VPI Type
rx-cell-cnts
ATM0/0/0
100 PVP
49865
VP Tunnels and VP Switching
© 2001, Cisco Systems, Inc.
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X-VPI
Status
tx-cell-cnts
50271
11
VP Tunnels and VP Switching
Configuring VP Tunnels for a Single Service Category
WAN
Atm5/1/0 Atm0/0/1
Atm0/0/1
Atm0/0/0
Router 1
Switch 1
interface ATM5/1/0.1 point-to-point
ip address 1.1.1.1 255.255.255.0
pvc 100/32
vbr-nrt 50000 40000 100
encapsulation aal5snap
!
!
interface ATM5/1/0.2 point-to-point
ip address 2.1.1.1 255.255.255.0
pvc 100/33
vbr-nrt 10000 8000 100
encapsulation aal5snap
!
Atm0/0/0
Atm0/0/0
Public PVP
Router 2
interface ATM0/0/0
no ip address
atm pvp 100 rx-cttr 7 tx-cttr 7
!
interface ATM0/0/0.100 point-to-point
no ip directed-broadcast
no atm ilmi-keepalive
!
interface ATM0/0/1
no ip address
atm pvc 100 32 rx-cttr 8 tx-cttr 8 interface ATM0/0/0.100 100 32
atm pvc 100 33 rx-cttr 9 tx-cttr 9 interface ATM0/0/0.100 100 33
!
Switch 2
interface ATM0/0/0.1 point-to-point
ip address 1.1.1.2 255.255.255.0
pvc 100/32
vbr-nrt 50000 40000 100
encapsulation aal5snap
!
interface ATM0/0/0.2 point-to-point
ip address 2.1.1.2 255.255.255.0
pvc 100/40
vbr-nrt 10000 8000 100
encapsulation aal5snap
interface ATM0/0/0
no ip address
atm pvp 100 rx-cttr 7 tx-cttr 7
!
interface ATM0/0/0.100 point-to-point
!
interface ATM0/0/1
no ip address
atm pvc 100 32 rx-cttr 8 tx-cttr 8 interface ATM0/0/0.100 100 32
atm pvc 100 40 rx-cttr 9 tx-cttr 9 interface ATM0/0/0.100 100 33
VP Tunnels and VP Switching
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VP Tunnels and VP Switching
Switch
c8510m-r2#sh atm vp int atm 0/0/0 100
Show Commands
VP Tunnels and VP Switching
© 2001, Cisco Systems, Inc.
Interface: ATM0/0/0, Type: oc3suni
VPI = 100
Status: TUNNEL
Time-since-last-status-change: 00:43:49
Connection-type: PVP
Cast-type: point-to-point
Rx connection-traffic-table-index: 7
Rx service-category: VBR-NRT (Non-Realtime Variable Bit Rate)
Rx pcr-clp01: 100000
Rx scr-clp0 : 80000
Rx mcr-clp01: none
Rx
cdvt: 1024 (from default for interface)
Rx
mbs: 100
Tx connection-traffic-table-index: 7
Tx service-category: VBR-NRT (Non-Realtime Variable Bit Rate)
Tx pcr-clp01: 100000
Tx scr-clp0 : 80000
Tx mcr-clp01: none
Tx
cdvt: none
Tx
mbs: 100
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VP Tunnels and VP Switching
Minimum Hardware/Software requirements and Type of VP Tunnel supported on Cisco equipment.
1- Unshaped VP Tunnel of any service category is supported on LS1010 (with eother FC-PCQ and FC-PFQ),
Catalyst 8540-MSR, Catalyst 8510-MSR, 7500 series router with PA-A3 and 7200 series router with PA-A2 or
PA-A3. Any 11.2, 11.3 or 12.0 IOS supports this feature . VC’s within unshaped tunnel have to be of same
Service category that unshaped VP tunnel is.
2- Shaped VP Tunnel of CBR service category is supported on LS1010 with FC-PFQ, Catalyst 8510-MSR,
Catalyst 8540-MSR, 7500 series router with PA-A3 and 7200 series router with PA-A2 or PA-A3. All VC’s
Within CBR VP Tunnel have to be of same service category.
2.1- Shaped VP Tunnels are first supported in 11.2(8.0.1)FWA4 vs of IOS 11.1 and WA3 release trains do not
Support shaped VP Tunnels.
2.2- For software vs after 11.3(0.8)TWA4 it is supported for service category of VC’swithin shaped tunnel
To be on CBR.
2.3- For earlier software vs that do support shaped VP tunnel VC’s within shaped CBR tunnel have to be of
CBR service category.
3- Hierarchical VP Tunnels of CBR service category are supported on LS1010 with FC-PFQ,
Catalyst 8510-MSR and Catalyst 8540-MSR. Minimum software requirement is W5 train of IOS.
VP Tunnels and VP Switching
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VP Tunnels and VP Switching
???
If the VP Service Provider is Policing, the connection will most likely experience cell drops
in the Service Provider network.
Q: How to overcome this?
A: Configure Shaped VP Tunnels.
VP Tunnels and VP Switching
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VP Tunnels and VP Switching
Shaped VP Tunnels
VP Tunnels that are traffic shaped. They are defined only for CBR service category on Cisco
Enterprise ATM Switches. All VC’s within single VP Tunnel must be same service category.
The overall output of this VP Tunnel is rate-limited by hardware to the PCR of the tunnel.
VP Tunnels and VP Switching
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VP Tunnels and VP Switching
Configuring Shaped VP Tunnels
WAN
Atm5/1/0 Atm0/0/1
Atm0/0/1
Atm0/0/0
Public PVP
Switch 1
atm connection-traffic-table-row index 10 cbr pcr 8000
atm connection-traffic-table-row index 20 vbr-nrt pcr 7000 scr0 4000 mbs 100
atm connection-traffic-table-row index 30 ubr pcr 8000
atm connection-traffic-table-row index 40 abr pcr 8000 mcr 0
!
interface ATM0/0/0
no ip address
atm pvp 100 shaped rx-cttr 10 tx-cttr 10
atm pvp 110 shaped rx-cttr 10 tx-cttr 10
atm pvp 120 shaped rx-cttr 10 tx-cttr 10
!
interface ATM0/0/0.100 point-to-point
atm cac service-category cbr deny
atm cac service-category vbr-nrt permit
!
interface ATM0/0/0.110 point-to-point
atm cac service-category cbr deny
atm cac service-category ubr permit
!
interface ATM0/0/0.120 point-to-point
atm cac service-category cbr deny
atm cac service-category abr permit
!
interface ATM0/0/1
no ip address
atm pvc 100 32 rx-cttr 20 tx-cttr 20 interface ATM0/0/0.100 100 32
atm pvc 110 40 rx-cttr 30 tx-cttr 30 interface ATM0/0/0.110 110 40
atm pvc 120 50 rx-cttr 40 tx-cttr 40 interface ATM0/0/0.120 120 50
VP Tunnels and VP Switching
© 2001, Cisco Systems, Inc.
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Atm0/0/0
Atm0/0/0
Router 1
interface ATM5/1/0.1 point-to-point
ip address 1.1.1.1 255.255.255.0
pvc 100/32
vbr-nrt 7000 4000 100
encapsulation aal5snap
!
interface ATM5/1/0.2 point-to-point
ip address 2.1.1.1 255.255.255.0
pvc 110/40
ubr 8000
!
interface ATM5/1/0.3 point-to-point
ip address 3.1.1.1 255.255.255.0
pvc 120/50
abr 8000 5000
17
VP Tunnels and VP Switching
Configuring Shaped VP Tunnels
Switch 2
atm connection-traffic-table-row index 10 cbr pcr 8000
atm connection-traffic-table-row index 20 vbr-nrt pcr 7000 scr0 4000 mbs 100
atm connection-traffic-table-row index 30 ubr pcr 8000
atm connection-traffic-table-row index 40 abr pcr 8000 mcr 0
!
interface ATM0/0/0
no ip address
atm pvp 100 shaped rx-cttr 10 tx-cttr 10
atm pvp 110 shaped rx-cttr 10 tx-cttr 10
atm pvp 120 shaped rx-cttr 10 tx-cttr 10
!
interface ATM0/0/0.100 point-to-point
atm cac service-category cbr deny
atm cac service-category vbr-nrt permit
!
interface ATM0/0/0.110 point-to-point
atm cac service-category cbr deny
atm cac service-category ubr permit
!
interface ATM0/0/0.120 point-to-point
no atm ilmi-keepalive
atm cac service-category cbr deny
atm cac service-category abr permit
!
interface ATM0/0/1
no ip address
atm pvc 100 32 rx-cttr 20 tx-cttr 20 interface ATM0/0/0.100 100 32
atm pvc 110 40 rx-cttr 30 tx-cttr 30 interface ATM0/0/0.110 110 40
atm pvc 120 50 rx-cttr 40 tx-cttr 40 interface ATM0/0/0.120 120 50
VP Tunnels and VP Switching
© 2001, Cisco Systems, Inc.
Router 2
interface ATM0/0/0.1 point-to-point
ip address 1.1.1.2 255.255.255.0
pvc 100/32
vbr-nrt 7000 4000 100
encapsulation aal5snap
!
interface ATM0/0/0.2 point-to-point
ip address 2.1.1.2 255.255.255.0
pvc 110/40
ubr 8000
!
interface ATM0/0/0.3 point-to-point
ip address 3.1.1.2 255.255.255.0
pvc 120/50
abr 8000 5000
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VP Tunnels and VP Switching
Show Commands for Shaped VP Tunnels
Switch#sh atm vp int atm0/0/0
Interface
VPI Type X-Interface
X-VPI Status
ATM0/0/0
100 PVP SHAPED TUNNEL
ATM0/0/0
110 PVP SHAPED TUNNEL
ATM0/0/0
120 PVP SHAPED TUNNEL
Switch#sh atm vp traffic int atm0/0/0
Interface
VPI Type
rx-cell-cnts
ATM0/0/0
100 PVP
1438
ATM0/0/0
110 PVP
1374
ATM0/0/0
120 PVP
755
VP Tunnels and VP Switching
© 2001, Cisco Systems, Inc.
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tx-cell-cnts
1446
1384
772
19
VP Tunnels and VP Switching
Show Commands for Shaped VP Tunnels
Switch#sh atm int atm0/0/0.110
Interface:
IF Status:
VP Tunnels and VP Switching
ATM0/0/0.110 Port-type:
vp tunnel
UP
Admin Status: up
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VP Tunnels and VP Switching
Restrictions for Shaped VP tunnels
1- LS1010 with FC-PFQ and Catalyst 8510-MSR support maximum of 2x64=128 shaped VP Tunnels:64 shaped
VP Tunnels are supported on x/0/y numbered ports and 64 on x/1/y numbered ports.
2- Catalyst 8540-MSR supports maximum of 8x64=512 shaped VP tunnels: maximum of 64 shaped VP tunnels
Can be defined on each of the following interface groups: (0/0/x, 1/0/x), (0/1/x, 1/1/x), (2/0/x, 3/0/x), (2/1/x, 3/1/x),
(9/0/x, 10/0/x), (9/1/x, 10/1/x), (11/0/x, 12/0/x), and (11/1/x, 12/1/x).
3- The bandwidth of the shaped VP tunnel is shared by the active VC’s inside the tunnel in strict round-robin
(RR) fashion.
4- Shaped VP tunnels do not support merged VC’s for tag switching.
5- UBR+ and ABR VC’s with non-zero MCR are not allowed on a shaped VP tunnel interface.
6- A maximum of 128 VC’s can transit s shaped VP tunnel interface.
VP Tunnels and VP Switching
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VP Tunnels and VP Switching
???
Q: What if I have more than 1 service category and cann’t buy more than 1 VP Tunnel?
A: Configure Hierarchical VP Tunnel
VP Tunnels and VP Switching
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VP Tunnels and VP Switching
Hierarchical VP Tunnels
VP Tunnels that are traffic shaped and support VC’s of multiple service categories to
co-exist in tunnel at the same time.
VP Tunnels and VP Switching
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VP Tunnels and VP Switching
Configuring Hierarchical VP Tunnels for Multiple Services Categories
WAN
Atm5/1/0 Atm0/0/1
Atm2/1/1
Atm0/0/0
Public PVP
Atm0/0/0
Atm2/1/0
Switch 1
atm hierarchical-tunnel
atm connection-traffic-table-row index 20 vbr-nrt pcr 7000 scr0 4000 mbs 100
atm connection-traffic-table-row index 30 ubr pcr 8000
atm connection-traffic-table-row index 40 abr pcr 8000 mcr 0
atm connection-traffic-table-row index 50 cbr pcr 50000
!
interface ATM0/0/0
no ip address
no ip directed-broadcast
logging event subif-link-status
atm pvp 100 hierarchical rx-cttr 50 tx-cttr 50
!
interface ATM0/0/0.100 point-to-point
no ip directed-broadcast
no atm ilmi-keepalive
!
interface ATM0/0/1
no ip address
no ip directed-broadcast
logging event subif-link-status
atm pvc 100 32 rx-cttr 20 tx-cttr 20 interface ATM0/0/0.100 100 32
atm pvc 100 40 rx-cttr 30 tx-cttr 30 interface ATM0/0/0.100 100 40
atm pvc 100 50 rx-cttr 40 tx-cttr 40 interface ATM0/0/0.100 100 50
VP Tunnels and VP Switching
© 2001, Cisco Systems, Inc.
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Router 1
interface ATM5/1/0.1 point-to-point
ip address 1.1.1.1 255.255.255.0
pvc 100/32
vbr-nrt 7000 4000 100
encapsulation aal5snap
!
interface ATM5/1/0.2 point-to-point
ip address 2.1.1.1 255.255.255.0
pvc 100/40
ubr 8000
encapsulation aal5snap
!
interface ATM5/1/0.3 point-to-point
ip address 3.1.1.1 255.255.255.0
pvc 100/50
abr 8000 5000
encapsulation aal5snap
24
VP Tunnels and VP Switching
Configuring Hierarchical VP Tunnels for Multiple Services Categories
Switch 2
atm hierarchical-tunnel
atm connection-traffic-table-row index 20 vbr-nrt pcr 7000 scr0 4000 mbs 100
atm connection-traffic-table-row index 30 ubr pcr 8000
atm connection-traffic-table-row index 40 abr pcr 8000 mcr 0
atm connection-traffic-table-row index 50 cbr pcr 50000
!
interface ATM2/1/0
no ip address
atm pvp 100 hierarchical rx-cttr 50 tx-cttr 50
!
interface ATM2/1/0.100 point-to-point
!
interface ATM2/1/1
no ip address
atm pvc 100 32 rx-cttr 20 tx-cttr 20 interface ATM2/1/0.100 100 32
atm pvc 100 40 rx-cttr 30 tx-cttr 30 interface ATM2/1/0.100 100 40
atm pvc 100 50 rx-cttr 40 tx-cttr 40 interface ATM2/1/0.100 100 50
VP Tunnels and VP Switching
© 2001, Cisco Systems, Inc.
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Router 2
interface ATM0/0/0.1 point-to-point
ip address 1.1.1.2 255.255.255.0
pvc 100/32
vbr-nrt 7000 4000 100
encapsulation aal5snap
!
interface ATM0/0/0.2 point-to-point
ip address 2.1.1.2 255.255.255.0
pvc 100/40
ubr 8000
encapsulation aal5snap
!
interface ATM0/0/0.3 point-to-point
ip address 3.1.1.2 255.255.255.0
pvc 100/50
abr 8000 5000
encapsulation aal5snap
25
VP Tunnels and VP Switching
Show Commands for Hierarchical VP Tunnels
Switch#sh atm vp
Interface
VPI Type X-Interface
X-VPI
ATM2/1/0
100 PVP HIE. TUNNEL
Status
Switch#sh atm resource
Resource configuration:
Sustained-cell-rate-margin-factor 1%
Abr-mode: EFCI
Hierarchical Scheduling Mode : enabled
*****TRUNCATED******
Switch#sh atm vp traffic int atm 2/1/0 100
Interface
VPI Type
rx-cell-cnts tx-cell-cnts
ATM2/1/0
100 PVP
2451
2470
VP Tunnels and VP Switching
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VP Tunnels and VP Switching
Show Commands for Hierarchical VP Tunnels
Switch#sh atm vp int atm2/1/0 100
Interface: ATM2/1/0, Type: oc3suni
VPI = 100
Status: HIE. TUNNEL
Time-since-last-status-change: 00:49:16
Connection-type: PVP
Cast-type: point-to-point
Rx cells: 2214, Tx cells: 2234
Rx connection-traffic-table-index: 50
Rx service-category: CBR (Constant Bit Rate)
Tx connection-traffic-table-index: 50
Tx service-category: CBR (Constant Bit Rate)
Tx pcr-clp01: 50000
Tx scr-clp01: none
Tx mcr-clp01: none
Tx
cdvt: none
Tx
mbs: none
VP Tunnels and VP Switching
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VP Tunnels and VP Switching
Restriction for Hierarchical VP Tunnels
1- LS1010 with FC-PFQ, Catalyst 5500 with ASP and FC-PFQ and Catalyst 8510-MSR support maximum of
62 hierarchical VP Tunnels.
2- Hierarchical VP Tunnels can only be defined on ports in slots 0 and 3 on LS1010 and Catalyst 8510-MSR.
Hierarchical VP Tunnels can be defined in slots 9 and 11 on Catalyst 5500 with ASP and FC-PFQ.
3- LS1010 equiped with FC-PFQ and ASP-B supports maximum of 30 hierarchical VP tunnels on ports 0/0/z
And 3/0/z combined, and maximum of 32 on ports 0/1/z and 3/1/z combined. Use “sh hardware” command to
Find out type of ASP and feature card.
4- LS1010 equiped with FC-PFQ and ASP-C as well as Catalyst 8510-MSR support maximum of 30
Hierarchical VP tunnels on ports 0/y/z and maximum of 32 on ports 3/y/z.
5- On Catalyst 5500 with ASP and FC-PFQ Maximum of 30 hierarchical VP tunnels can be defined on ports
9/0/z and11/0/7 combined. Maximum of 32 hierarchical VP tunnels can be defined on ports 9/1/z and 11/1/z
Combined.
6- On Catalyst 8540-MSR hierarchical VP tunnels can be defined on slots 0,2,9 and 11.
VP Tunnels and VP Switching
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VP Tunnels and VP Switching
Restriction for Hierarchical VP Tunnels
7- Maximum number of hierarchical VP Tunnels varies between 120 and 240 depending on type of PAM’s
Used. If all the ports are Super PAM’s (full with modules) the maximum number of VP tunnels supported
Is 240. If all the ports installed are Supper Cam’s with LS1010 PAM’s maximum number of hierarchical
VP tunnels is 120.
8- Hierarchical VP tunnels can not co-exist with any other type of connection (VC’s, VP’s, Tag VC’s regular
Or shaped VP tunnels etc.) on the same physical interface. So, the only type of connection that can coexist
With hierarchical VP tunnel on same physical interface are additional hierarchical VP tunnels and well
Known VC’s (signaling 0/5, PNNI, 0/18, ILMI 0/16 etc.).
9- Hierarchical VP Tunnels can support only ATM Forum VC’s or only Tag VC’s, but not both at the
same time.
10- When doing OIR (on line insertion and removal) of PAM that has hierarchical VP tunnels configured
For its ports, configuration of hierarchical tunnel will be preserved. So if same PAM is inserted back
In hierarchical VP Tunnel will automaticly be active. However,if different type of PAM is to be inserted
It is strongly recommended that any configured hierarchical VP Tunnel (on port about to be removed) be
Deleted prior to physical removal of PAM.
VP Tunnels and VP Switching
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VP Tunnels and VP Switching
Some Acronyms
VP: virtual path
VC: virtual channel
VPI: virtual path identifier
VCI: virtual channel identifier
ABR: available bit rate
CBR: constant bit rate
UBR: unspecified bit rate
VBR-nrt: variable bit rate – no real time
VBR-rt: variable bit rate – real time
PCR: peak cell rate
SCR: sustained cell rate
MBS: maximum burst size
FC-PFQ: feature card- per flow queueing
VP Tunnels and VP Switching
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