Aggregate bandwidth at a threshold on IOS Router

Gerard Roy · ‎12-01-2008

Hi All,

I have a 1811 that is used to failover between 2 different WAN providers. One Cable and the other DSL - works well. I now want to aggregate the available bandwidth from these two and use all that is available. I want to allow a bandwidth threshold of 80% with the primary link and start to send all new requests down the secondary link till I saturate all available bandwidth. Can IOS do this?

jjoseph01 · ‎12-01-2008

Yeah, I think you can. One other cool feature is object tracking, where it can utilize both at the same time for outgoing traffic. Its session based and it works well also. Ive done this many times in the past.

http://www.cisco.com/en/US/docs/ios/12_2t/12_2t15/feature/guide/fthsrptk.html

jjoseph01 · ‎12-01-2008

This one may be a better link. You just have the two static default routes with the same administrative distance. Its a load balancer and a 'failover' as well.

http://www.cisco.com/en/US/docs/ios/12_3/12_3x/12_3xe/feature/guide/dbackupx.html

Joseph W. Doherty · ‎12-01-2008

For outbound, what you describe might be possible using OER or PfR if either is supported on the 1811.

jjoseph01 · ‎12-01-2008

Yeah, I guess I should clarify, I have done this on 1841s. Never done it on an 1811 before. Plus, with that, you would have to vlan off a switch, unless you put in another ethernet module for it. The 1841s do work well, but I will say I had to upgrade the IOS to support object tracking, maybe it was SPServices (cant remember right off). Either way, its really cool.