RE: PMTU-D: remember, your load balancer is broken

: : Then again, at least some Cisco gear doesn't think that. : : perdition>sh in g0/1 : GigabitEthernet0/1 is up, line protocol is up : Hardware is Gigabit Ethernet, address is 00d0.7966.eeae (bia 00d0.7966.eeae) : MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec, rely 255/255, load 24/255 the last i checked, 1500 was the default. given the right hw & sw, MTU can be adjusted upward. i seem to remember seeing it demonstrated on 12000 gear. there is a draft [draft-kaplan-isis-ext-eth-02.txt] that discusses some extensions useful to support large frames. these extensions- again, the last i checked- were supported by cisco, and other vendors. as always, contact your authorized support rep when in doubt. ymmv, _k