OS10 Enterprise Edition User Guide Release 10.4.0E(R3)

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Local AS

During BGP network migration, you can maintain existing AS numbers. Reconfigure your routers with the new information to disable after the migration. Network migration is not supported on passive peer templates. You must configure Peer templates before assigning it to an AS.

  1. Enter a neighbor IP address, A.B.C.D, in ROUTER-BGP mode.
    neighbor 
                                           ip-address
                                        
  2. Enter a local-as number for the peer, and the AS values not prepended to announcements from the neighbors in ROUTER-NEIGHBOR mode (1 to 4294967295).
    local-as 
                                           as number [no prepend]
                                        
  3. Return to ROUTER-BGP mode.
    exit
  4. Enter a template name to assign to the peer-groups in ROUTER-BGP mode (up to 16 characters).
    template 
                                           template-name
                                        
  5. Enter a local-as number for the peer in ROUTER-TEMPLATE mode.
    local-as 
                                           as number [no prepend]
                                        
  6. Add a remote AS in ROUTER-TEMPLATE mode (1 to 65535 for 2 bytes, 1 to 4294967295 for 4 bytes).
    remote-as 
                                           as-number
                                        

Allow external routes from neighbor

OS10(config)# router bgp 10
                                 OS10(conf-router-bgp-10)# neighbor 32.1.1.2
                                 OS10(conf-router-neighbor)# local-as 50
                                 OS10(conf-router-neighbor)# exit
                                 OS10(conf-router-bgp-10)# template bgppg1
                                 OS10(conf-router-template)# fall-over
                                 OS10(conf-router-template)# local-as 400
                                 OS10(conf-router-template)# remote-as 102 
                              

Local AS number disabled

OS10(config)# router bgp 102
                                 OS10(conf-router-bgp-102)# neighbor 32.1.1.2
                                 OS10(conf-router-neighbor)# no local-as 100
                              

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