Cisco BGP Configuration by topology

   April 13, 2007  Leave a comment

What is a command for showing BGP table? "Show ip BGP", that’s right. Visit www.showipbgp.com to see a lot of sample BGP configurations and constantly updating time to time. The site provides nothing but BGP information. Thinking about hiring consultant? It won’t be cheap. The site also provides dynamips files that allow you to play and simulate BGP scenarios before applying production network. 
I believe that the below topologies will cover most of BGP configurations you need in the field. If you need a configuration for more specific topology, please send email at [email protected].

Click below samples

 

 

 

 

BGP topology 1
  • ISPs : 1
  • WAN links : 1
  • CPE : 1
  • PE : 1

Sample configurations

1-1-1. Cisco Single BGP with default route
1-2-1. Cisco Single BGP with Metric
1-3-1. Cisco Single BGP with Origin value
1-4-1. Cisco Single BGP with AS prepend
1-5-1. Cisco Single BGP with Community string
1-6-1. Cisco Single BGP with Multi-hop
1-7-1. Cisco Single BGP with MD5

BGP configuration topology 1

 

 

 

BGP topology 2

  
  • ISPs : 1
  • WAN links : 2
  • CPE : 1
  • PE : 1

Sample configurations

2-1-1. Cisco Single BGP with Multi-hop (load-balancing)
2-1-2. Cisco Single BGP with Multi-hop and eigrp(load-balancing)
2-2-1. Cisco dual BGP with conditional announcement
2-3-1. Cisco Single BGP with Multi-hop (load-balancing) on Ethernet using GRE Tunnel
2-3-2. Cisco Multiple BGP with load-balancing on Ethernet using Maximum-paths
2-3-3. Cisco Multiple BGP with load-sharing using Maximum-paths and DMZLink-BW

BGP configuration topology 2

 

 

BGP topology 3

  
  • ISPs : 1
  • WAN links : 2
  • CPE : 1
  • PE : 2

Sample configurations

3-1-1. Cisco Dual BGP with Metric (Redundancy)
3-2-1. Cisco Dual BGP with prefix Length (Load-balancing)
3-3-1. Cisco Dual BGP with AS prepend (Redundancy)
3-3-2. Cisco Dual BGP with AS prepend (Load-balancing)
3-4-1. Cisco Dual BGP with Community string (Redundancy)
3-4-2. Cisco Dual BGP with Community string (Load-balancing)
3-5-1. Cisco Dual BGP with Origin Value (Redundancy)
3-6-1. Cisco Dual BGP with Conditional Announcement

BGP configuration topology 3

 

 

BGP topology 4

  
  • ISPs : 2
  • WAN links : 2
  • CPE : 1
  • PE : 2

Sample configurations

4-1-1. Cisco dual BGP with Metric (Redundancy)
4-2-1. Cisco dual BGP with prefix Length (Load-balancing)
4-3-1. Cisco dual BGP with AS prepend (Redundancy)
4-3-2. Cisco dual BGP with AS prepend (Load-balancing)
4-4-1. Cisco dual BGP with Community string (Redundancy)
4-4-2. Cisco dual BGP with Community string (Load-balancing)
4-5-1. Cisco dual BGP with Origin Value (Redundancy)
4-5-2. Cisco dual BGP with Origin Value (Load-balancing)
4-6-1. Cisco dual BGP with Conditional Announcement
 

BGP configuration topology 4

 

 

BGP topology 5

  
  • ISPs : 1
  • WAN links : 2
  • CPE :2
  • PE : 2

Sample configurations

5-1-1. Cisco dual BGP with AS prepend-HSRP (Load-sharing)
5-1-2. Cisco dual BGP with AS prepend-iBGP (Load-sharing)
5-2-1. Cisco dual BGP with Community string-HSRP (Load-sharing)
5-2-2. Cisco dual BGP with Community string-iBGP (Load-sharing)
 

BGP configuration topology 5

 

 

BGP topology 6

  
  • ISPs : 2
  • WAN links : 2
  • CPE :2
  • PE : 2

Sample configurations

6-1-1. Cisco dual BGP with AS prepend-HSRP (Load-sharing)
6-1-2. Cisco dual BGP with AS prepend-iBGP (Load-sharing)
6-2-1. Cisco dual BGP with Community string-HSRP (Load-sharing)
6-2-2. Cisco dual BGP with Community string-iBGP (Load-sharing)
6-3-1. Cisco dual BGP with AS prepend-RIP (Load-sharing)
6-4-1. Cisco dual BGP with AS prepend-eIGRP (Load-sharing)
 

BGP configuration topology 6

 

 

BGP topology 7

  
  • ISPs : 2
  • WAN links : 2
  • CPE :2
  • PE : 2

Sample configurations

7-1-1. Cisco dual BGP with eBGP (Failover)
7-2-1. Cisco dual BGP with RIP (Failover)
7-3-1. Cisco dual BGP with eIGRP (Failover)

 

BGP configuration topology 7

 

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