Route Summarization using BGP aggregate-address command Configuration

Route Summarization using BGP aggregate-address command Configuration

• topology
  
  
  
  
• Configuration Settings Overview
  
  
  1. BGP Advertise Route
     AS20 : 20.0.2.0/24
     AS31 : 30.1.1.0/24
     AS32 : 30.2.1.0/24
     
     
  2. BGP Configuration
     The following aggregate-address command is set to R31 in AS30, and a routing table etc. of R22 is collected each time.
     • no aggregate-address
       
     • aggregate-address 30.0.0.0 255.0.0.0
       Confirm that atomic-aggregate attribute is set.
       
     • aggregate-address 30.0.0.0 255.0.0.0 summary-only
       
     • aggregate-address 30.0.0.0 255.0.0.0 as-set summary-only
       Check AS PATH Attribute.
  
  
• Dynagen Config File / Router Config

  (1)  Dynagen .net file
  
  (2)  R11
  
  (3)  R12
  
  (4)  R13
  
  (5)  R21
  
  (6)  R22
  
  (7)  R31 (as-set summary-only)
  
  (8)  R32
  
  (9)  R41
  
  (10) R51
  
  (11) HOSTA
  
  (12) HOSTB
  
  (13) HOSTC
  

• show command

  R22 : 
   sh ip route
   sh bgp ipv4 unicast
   sh bgp ipv4 unicast 30.0.0.0
  
  1.no aggregate-address
  
  2.aggregate 30.0.0.0/8
  
  3.aggregate 30.0.0.0/8 as-set
  
  4.aggregate 30.0.0.0/8 summary-only
  
  5.aggregate 30.0.0.0/8 as-set summary-only