I read that Jumbo frames, when enabled on Gig ingress interfaces on a switch, will be dropped if the egress interface is 10/100. Does this hold true if the actual egress interface on the switch is a gig interface however the port on the other end of that interface is 10/100 only such in a case of a PC. Would the frames still get dropped?
Kinda depends on your switch/pc. There are some switches that have support for jumbo frames at 10/100. Like some of the line cards of a 6500. So if your switch supports jumbo on 10/100 and your host supports jumbo frame on 10/100 then no, nothing is dropped. Assuming the Jumbo value set is not larger than either side can support.
But if either the switch and/or pc doesn't then it will be dropped. Fragmentation only occurs over a layer3 boundry as long as the DF flag isn't set.
Hi gents, thanks for your responses. I am going to play around with this setting however since a switch reload is required after turning it on, I will have to wait for a window. I'll update this thread with the results.
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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