Wan Acceleration to Work w GRE Tunnels & EIGRP/CEF Load Balancing?

Unanswered Question
Jul 22nd, 2009

Our architecture of two branch office GRE tunnels over two T-1 lines over the cloud terminating to two GRE tunnels on two HQ routers is causing problems with consultants trying to get WAN acceleration working. They have gone so far as to add a delay onto our second tunnel essentially removing any load balancing over both GRE tunnels (default EIGRP variance).

How do I integrate WAN acceleration and EIGRP/CEF load balance over two GRE tunnels over two WAN links?



I have this problem too.
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ldardon Tue, 07/28/2009 - 08:25

You shouldn't have any problems with configuring gre tunnels and cef. Cef is basically just layer-3 switching and a gre tunnel is just an interface. You should configure your tunnel as normal, there should be no problems with gre and cef.

EIGRP will use the same administrative distance and metric calculation for the GRE tunnel. The cost calculation is based on bandwidth and delay. The bandwidth and delay of the GRE tunnel will be taken from the tunnel interface configured on the router.


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