BGP Routing protocol

• Link - pushing Ospf through bgp mpls network.

• http://ccie-in-3-months.blogspot.com/2008/04/bgp-how-to-display-incomingoutgoing.html - Filtering.

• http://www.nil.com/ipcorner/DesigningBGPNetworks/

• http://blog.ioshints.info/2009/09/display-rejected-bgp-routes.html

• http://puck.nether.net/pipermail/cisco-nsp/2009-February/057944.html - Static tracked route

• http://etherealmind.com/bgp-redistribution-ospf-statics/

• http://blog.ioshints.info/2008/02/bgp-essentials-as-path-prepending.html

• Command to debug
  • #show bgp neighbor a.b.c.d rejected-routes
  • #show ip bgp neighbor a.b.c.d received-routes
    • Display the routes received from the neighbor
  • #show ip bgp neighbor a.b.c.d routes
    • Display the routes sent by the neighbor and accepted by the inbound BGP filters
• Send output to tftp server.

  •        show ip bgp neighbor a.b.c.d received-routes | redirect tftp://x.x.x.x/received.txt 
           show ip bgp neighbor a.b.c.d routes | redirect tftp://x.x.x.x/routes.txt 

• To simplify testing use, soft reconfig (Check it doubles memory usage)

  •        neighbor a.b.c.d soft-reconfiguration in 
           clear ip bgp a.b.c.d soft in

• Test bgp routes

  •         sh ip bgp neighbors  x.x.x.x received-routes 
            sh ip bgp vpnv4 all neighbors a.b.c.d advertised-routes

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CategoryCisco