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BGP load sharing with bandwidth

We are running eBGP between two routers. We had a 250 M PVC between the two routers on OSM STM4 ATM interface. We need to increase the B/W between the two routers to 350M, but because there's a limitation on the PVC size for the OSM STM4 ATM card (Max. size of the PVC is 300M), so we created new PVC between the two routers on the same circuits (and of course the same interfaces). Now I need to enable the load sharing between the two routers taking the PVC B/W in consideration.. So I prepared this config, is it right and full? Or Am I missing anything here..

RouterA:

Router bgp 100

Neighbor 10.1.1.1 remote-as 200 (10.1.1.1 is loop back address fro Router B)

Neighbor 10.1.1.1 ebgp-multihop

bgp dmzlink-bw

neighbor 10.1.1.1 dmzlink-bw

neighbor 10.1.1.1 send-community both

maximum-paths ebgp 2

RouterB:

Router bgp 100

Neighbor 10.10.1.1 remote-as 200 (10.10.1.1 is loop back address fro Router A)

Neighbor 10.10.1.1 ebgp-multihop

neighbor 10.10.1.1 send-community both

bgp dmzlink-bw

neighbor 10.10.1.1 dmzlink-bw

maximum-paths ebgp 2

1 REPLY
New Member

Re: BGP load sharing with bandwidth

I implmented these changes but did not work, becuase the command neighbor 10.10.1.1 dmzlink-bw is not supported with multihop (Neighbor 10.10.1.1 ebgp-multihop).

I removed the loopback BGP neighbor and created 2 BGP neighbors with the directly connected interfaces IP's and applied same configuration and now it works fine.. Here's show Ip route (Ip's and AS numbers have been chnaged)

R1#sh ip ro 10.10.0.1

Routing entry for 10.10.0.0/20

Known via "bgp xxxxx", distance 20, metric 10

Tag xxxx, type external

Last update from x.x.x.x 00:00:24 ago

Routing Descriptor Blocks:

* x.x.x.x, from x.x.x.x, 00:00:24 ago

Route metric is 10, traffic share count is 240

AS Hops 1

Route tag xxxxx

y.y.y.y, from y.y.y.y, 00:00:24 ago

Route metric is 10, traffic share count is 83

AS Hops 1

Route tag xxxx

notice the traffic share count

traffic share count is 240 (for peer #1)

traffic share count is 83 (for peer # 2)

It's almost 3:1

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