On Sun Mar 24, 2013 at 02:06:09PM +0300, Samir Abidali wrote: > Can you somebody help me in understanding whey GRE tunnel Cisco > WS-SUP720-3BXL , with two GRE tunnel configured will spike the cpur to 99% > when the traffic goes beyond 30mbps. > > According to documentation, the GRE is hardware accelerated, please note that > the two tunnel interface has two different source interface ( SVI source ip > address )
It's important to use a different source interface for each Tunnel (we use loopback interfaces per tunnel). I'm doing over 1Gbps of GRE spread over multiple tunnels, and my CPU is running at around 30%. I'd probably start by looking at MTU - is this box having to do a lot of fragmentation? That will kill the CPU very quickly. Simon _______________________________________________ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
