Lab 6-1 Debrief
Connecting an Enterprise Network to an ISP Network
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Lab Topology
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Lab Review: What did you accomplish?
Task 1 – Cleaning Up
 What steps did you take to remove unnecessary configuration?
 How did you create the initial configuration?
Task 2 – Configuring BGP
 What is needed to configure basic BGP?
 What steps did you take to configure neighbors, advertise
networks, and verify the configuration?
Task 3 – Configuring BGP authentication
 Which authentication type did you select?
 How can you verify MD5 authentication?
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Verification
 Is your solution working?
 What method did you follow to verify the status of all BGP
connections?
 Which commands did you use to verify the following information?
– Display information about BGP and TCP connections to
neighbors
– Display the parameters and current state of the active routing
protocol process
– Display entries in the BGP routing table
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Check Points
 BGP process and AS number
 Neighbor relationship status
 Advertise networks
 BGP routing information base
 BGP routes
 BGP protocol
 Default route
 Authentication
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Sample Solution
 Configure BGP process
 Define neighbors
 Advertise networks
 Define default route
 Configure authentication
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Alternative Solutions
 BGP process
– Different AS numbers and
connectivity options
 EBGP/IBGP neighbors
– update-source command
 Advertise networks
– next-hop-self,
synchronization
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Q and A
1. Why is the AS number important?
2. Why is the neighbor IP address important?
3. Why is authentication necessary?
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Summary
 Create a good implementation plan and define the BGP
requirements before configuring BGP operations.
 Several solutions exist and alternative solutions give similar or
very different results.
© 2009 Cisco Systems, Inc. All rights reserved.
ROUTE v1.0—6-9
© 2009 Cisco Systems, Inc. All rights reserved.
ROUTE v1.0—6-10