netflow with tunnel interfaces

[justin.donoghue]

Hi I have a customer who is using tunnel interfaces with IPSEC on their WAN. They are collecting Netflow stats and exporting them to a server.Under the tunnel interface I have specified the bandwidth to be 1000.When I did not specify the bandwidth the tunnel speed came up on the management software as being 9kb. This was obviously not a true reflection when observing the data. The far end remote office is terminating via dsl and my question is should I specify the bandwidth under the tunnel interface to be closer to the dsl connection they have there ie 512k? There are many other tunnels coming from the main site and I have not configured Netflow on the this particular remote end.

[Dheeraj Gera]

Hi Justin,

If we would define bandwidth on tunnel interface it will manipulate routing decisions also and tunnel recursiuon issue could also occur where tunnel would see that the best way to reach teh destination is via tunnel itself. Beside taht the actual bandwidth used by the tunnel is based on the physical interface associated with it.