Verify the BGP Protocol and Peers

This chapter describes how to check whether the Border Gateway Protocol (BGP) is configured correctly on a Juniper Networks router in your network, the internal Border Gateway Protocol (IBGP) and exterior Border Gateway Protocol (EBGP) sessions are properly established, the external routes are advertised and received correctly, and the BGP path selection process is working properly. (See Table 34.)

Table 34: Checklist for Verifying the BGP Protocol and Peers

Verify the BGP Protocol and Peers Tasks	Command or Action
Verify the BGP Protocol
Verify BGP on an Internal Router	show configuration
Verify BGP on a Border Router	show configuration
Verify BGP Peers
Check That BGP Sessions Are Up	show bgp summary
Verify That a Neighbor is Advertising a Particular Route	show route advertising-protocol bgp neighbor-address
Verify That a Particular BGP Route Is Received on Your Router	show route receive-protocol bgp neighbor-address
Examine BGP Routes and Route Selection
Examine the Local Preference Selection	show route destination-prefix < detail >
Examine the Multiple Exit Discriminator Route Selection	show route destination-prefix < detail >
Examine the EBGP over IBGP Selection	show route destination-prefix < detail >
Examine the IGP Cost Selection	show route destination-prefix < detail >
Examine Routes in the Forwarding Table	show route forwarding-table