BGP Load Balancing/Sharing to single homed ISP

Unanswered Question
Jun 1st, 2007
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I am trying to work out how to config load balancing/sharing using BGP to a single homed ISP.


I have to CE routers (on the same AS) connecting to two separate PE routers (on the same AS) with 20M CDR PVC?s over a STM-1 links.


BGP Configs on the CE?s are below. Please can you advise what I can do to ensure that outbound traffic from the site is load shared/balanced. Also if you feel that there is any invalid config below, please can you let me know.


I would really appreciate your help.

Thanks


router bgp 65500


no synchronization


bgp log-neighbor-changes


network 10.126.0.0 mask 255.255.0.0


network 10.126.65.0 mask 255.255.255.128


network 62.252.64.19 mask 255.255.255.255


network 81.144.240.87 mask 255.255.255.255


network 81.144.240.88 mask 255.255.255.255


network 137.213.248.0 mask 255.255.255.252


network 172.27.6.32 mask 255.255.255.224


network 172.27.6.128 mask 255.255.255.224


network 172.27.6.196 mask 255.255.255.255


network 172.31.0.0 mask 255.255.255.224


network 194.70.153.99 mask 255.255.255.255


network 217.140.43.88 mask 255.255.255.248


aggregate-address 10.126.64.0 255.255.248.0 summary-only


neighbor 10.126.65.3 remote-as 65500


neighbor 10.126.65.3 timers 5 15


neighbor 10.126.65.137 remote-as 65500


neighbor 10.126.65.137 description Scnm-r-cdif-02


neighbor 10.126.65.137 ebgp-multihop 4


neighbor 10.126.65.137 update-source Loopback0


neighbor 10.126.65.137 timers 5 15


neighbor 81.144.17.111 remote-as 2856


neighbor 81.144.17.111 description BT PE Router


neighbor 81.144.17.111 ebgp-multihop 3


neighbor 81.144.17.111 update-source Loopback0


neighbor 81.144.17.111 default-originate


neighbor 81.144.17.111 timers 5 15


default-metric 1


no auto-summary



router bgp 65500


no synchronization


bgp log-neighbor-changes


network 10.126.0.0 mask 255.255.0.0


network 10.126.64.0 mask 255.255.240.0


network 10.126.65.0 mask 255.255.255.128


network 10.126.72.0 mask 255.255.248.0


network 10.126.72.0 mask 255.255.254.0


network 10.126.72.0 mask 255.255.255.0


network 81.144.240.87 mask 255.255.255.255


network 81.144.240.88 mask 255.255.255.255


network 137.213.248.0 mask 255.255.255.252


network 172.27.6.32 mask 255.255.255.224


network 172.27.6.128 mask 255.255.255.224


network 172.27.6.196 mask 255.255.255.255


network 172.31.0.0 mask 255.255.255.224


network 194.70.153.99 mask 255.255.255.255


network 217.140.43.88 mask 255.255.255.248


aggregate-address 10.126.72.0 255.255.248.0 summary-only


neighbor 10.126.65.2 remote-as 65500


neighbor 10.126.65.2 timers 5 15


neighbor 10.126.65.138 remote-as 65500


neighbor 10.126.65.138 description Scnm-r-cdif-01


neighbor 10.126.65.138 ebgp-multihop 4


neighbor 10.126.65.138 update-source Loopback0


neighbor 81.144.17.52 remote-as 2856


neighbor 81.144.17.52 description BT PE Router


neighbor 81.144.17.52 ebgp-multihop 3


neighbor 81.144.17.52 update-source Loopback0


neighbor 81.144.17.52 default-originate


neighbor 81.144.17.52 timers 5 15


no auto-summary


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