ShowIPBGP

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 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 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 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 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 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 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)