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DES-7200 Configuration Guide Chapter 2 Configuring BGP IP VPN
2-49
DES-7200(config-router)#
address-family ipv4
Enter IPv4 address family configuration mode
DES-7200(config-router-af)#
neighbor {peer-address |
peer-group-name} send-label
Enable BGP to carry labels for IP routes
DES-7200(config-router-af)# end
Return to privilege mode
DES-7200# show running-config
Display existing configurations.
DES-7200# show ip bgp labels
Display BGP label information
Configure Second Carrier
Before configuration, please configure IGP for the Second Carrier network in order to guarantee
the connectivity of Second Carrier network. Depending on the application scenarios of the
Second Carrier, different configuration schemes will be adopted:
z Scenario I: IP core second-level ISP
z Scenario II: MPLS core second-level ISP
z Scenario III: MPLS core second-level VPN provider
Second Carrier provides Internet service based on IP core
In Scenario I, adjacencies are established between ASBRs and CEs to exchange external routes.
CEs are route reflectors to reflect external routes between different sites. The configuration task
mainly involves:
z Configure an intra-site BGP session
z Configure a BGP session between CSC-CEs of different sites
z Configure route map filtering
Configure an intra-site IBGP session
Configure an IBGP session between intra-site ASBR and CSC-CE, and configure CSC-CE as
route reflector.
Command Function
DES-7200(config)# router bgp asn
Configure BGP router