Cisco BGP Route Summarization

Cisco BGP Route Summarization

• Topology
  
  
  
  
• Configuration Settings Overview
  
  
  1. 1. BGP Advertise by network command
     20.0.2.0/24 in AS20
     
     
  2. 2. Set the following command at R31 of AS30.
     ip route 30.0.0.0 255.0.0.0 null0
     
     
  3. 3. Execute the following command at R31 and confirm Origin Attribute of R22.
     
     • network 30.0.0.0 mask 255.0.0.0
     • redistribute static
  
  
• Dynagen Config File / Router Config

  (1)  Dynagen .net file
  
  (2)  R11
  
  (3)  R12
  
  (4)  R13
  
  (5)  R21
  
  (6)  R22
  
  (7)  R31 (network 30.0.0.0 mask 255.0.0.0)
  
  (8)  R32
  
  (9)  R41
  
  (10) R51
  
  (11) HOSTA
  
  (12) HOSTB
  
  (13) HOSTC
  

• R22 Routing table & BGP table

  1. R31 network 30.0.0.0 mask 255.0.0.0
     R22 : sh ip route
         : sh bgp ipv4 unicast
  
  2. R31 redistribute static
     R22 : sh ip route
         : sh bgp ipv4 unicast