Cisco MPLS-VPN MP-BGP allowas-in Configuration

Cisco MPLS-VPN MP-BGP allowas-in Configuration

• Topology
  
  
  
  
• Configuration Settings Overview

  The following consideration is necessary because each site uses the same AS Number.

  1. allowas-in

     Allow AS-PATH List that includes self AS in AS-PATH List.
     Normally, when self AS is included in the AS-PATH List, it is considered to be looping and the route is not valid.

  
  
• Dynagen Config File / Router Config

  1.  Dynagen .net file
  
  2.  P1
  
  3.  P2
  
  4.  PE2
  
  5.  PE3
  
  6.  CE1
  
  7.  CEA2
  
  8.  CEB2
  
  9.  CEA3
  
  10. CEB3
  
  11. PE11
  
  12. PE12
  
  13. C1
  

• show command

  PE2(R4) :
    sh bgp vpnv4 unicast vrf VA2
  PE3(R5) :
    sh bgp vpnv4 unicast vrf VA3
  CEA2(R7) :
    sh bgp ipv4 unicast
    sh ip route
  CEA3(R9) :
    sh bgp ipv4 unicast
    sh ip route
  
  1.  PE2
  
  2.  PE3
  
  3.  CEA2
  
  4.  CEA3