This is first time I have to implement Q-in-Q to transport some groups internal VLANS through our core 6500s at L2.
I know how to enable the tunnels but I am not confident on the L2 MTU size. Since the packets will be increased by 4 bytes then I would assume I need the MTU increased by 4 on all switch ports that transport the tunnel in order to pass a frame that is 1500 without dropping it. Since I am not routing these packets then the IP MTU doesn't come into play for fragmentation. If I change the port MTU to 1504 will it change the IP MTU globally and if so does that mean I have to reset the switch for it all to take effect? Thanks for any help. Even more confused than yesterday! Jeff Fitzwater OIT Network Systems Princeton University _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
