[c-nsp] jumbo frame

[Peter Rathlev]

On Wed, 2008-09-10 at 07:08 -0400, kcc wrote:
> Do I need to enable the jumbo frame in cisco eg: mtu 9000
> or it can automatically learn?

If you're asking whether the switch/router can automatically "sense"
that it need to use a 9000 byte MTU, then the answer is no. Packets
exceeding the configured (or default) MTU are discarded as errors.

Default MTU is 1500 bytes, most interfaces allowing "baby giants" AFAIK,
up to 1530 bytes or so.

You can configure it with the config-if command "mtu X". Beware: The
"small" L3 switches (e.g. 3750) needs a "system mtu jumbo X" global
config command and a reload.

Regards,
Peter