On Thu, May 08, 2003 at 07:04:18PM +0200, Mikael Abrahamsson wrote:
On Thu, 8 May 2003, Leo Bicknell wrote:
Could you define newer? My limited testing with 12.0S and 12.2something shows both returing MTU can't be set on a tunnel interface.
You cannot change the MTU of the tunnel, but you can change the "ip mtu" of the tunnel. I've done this on 7200 and 1600 that are running IOSes that are at least a year old. The feature is at least 2-3 years old, because that's the first time I encountered it.
The router will do re-assembly on the tunnel level to be able to transfer a 1500 byte sized IP packet non-fragmented.
Be warned, while fragmentation follows some form of fast path, reassembly is process switched. A beefy 7206 will fragment 300Mbps easily, but will reassemble around 30Mbps. -- Richard A Steenbergen <ras@e-gerbil.net> http://www.e-gerbil.net/ras GPG Key ID: 0xF8B12CBC (7535 7F59 8204 ED1F CC1C 53AF 4C41 5ECA F8B1 2CBC)