2 replies to this topic

[Abhijit Wakde]

Dear all, my company have 7 locations all over india.Currently, we have 1 ISP connection for MPLS & Internet.We are planning for another ISP connectivity as back up.The configuration shall work as auto failover with load balancing.
1. My doubt is can a BGp router has 2 AS since, in this case , both ISPs would provide me 2 AS.
2. How can I configure load balancing in BGP?
3. How can I configure auto failover ?
PLz guide me

[Ash90]

(1) You can not define multiple instances of BGP on a single cisco device. However you can define multiple TCP sessions from single BGP instance. Checkout following:

https://supportforum.../docs/DOC-15725

(2) No, BGP can not provide loadbalancing of traffic automatically, like Interior Gateway Protocols do. It the sole responsibility of the Networks Administrator to watch the traffic behaviour. However BGP paramters allow to influence the traffic flow in either-way (both for inbound and outbound traffic)

(3) You can configure the auto failover using "Cisco IOS IP SLAs" or "Cisco IOS OER". Note that "Cisco IOS IP SLA" is used to detect the fail-over situations.

[ANILSHARMA]

For configure load balancing in BGP

router bgp 6500

Maximum-paths eibgp 2

For auto failover use command.

BGP Local Preference

Edited by ANILSHARMA, 02 March 2012 - 04:43 PM.