From: johngibson1541@yahoo.com
Date: Thu Feb 22 2007 - 02:47:50 ART
I know the internet has almost all different mtu in every link,
this is fine because the routers can fragment packets. The
hosts reassemble packets.
a switch, if all switching/bridging no routing, can not fragment
packets right? all the layer 2 ports in 1 switch have to have exact
same mtu, thats why 3550's mtu command is in global mode, not
possible to be in layer interface mode, right (imagine received
a 1000 byte packet from a MTU 1200 port and have to send this
packet to a MTU 500 port) ?
For the baby giant issue for trunk link's tag, the switch says MTU 1500,
but it accepts, say, 1520. I am not 100% sure. Don't know which command can show
the actual tolerance.
That was for the tags of trunk links.
So maybe they have maxed out the tolerance for tunk link's tags. Now
dot1q tunnel needs more tolerance, Maybe when we configure MTU 1504,
it will make the switch accept 1524 ?
John
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