07-03-2006 05:25 AM - edited 03-03-2019 03:53 AM
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
07-04-2006 06:00 AM
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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