topic RE: Enabling Jumbo Frames on our Core network in ExtremeSwitching (EOS)

Enabling Jumbo Frames on our Core network

Jeremy_Bullock — Tue, 15 Mar 2016 21:17:00 GMT

If I enable Jumbo frames on a top of the rack (server farm) and 'above' it on a 'core' switch, will it effect devices that might not support jumbo frames?

RE: Enabling Jumbo Frames on our Core network

Patrick_Voss — Tue, 15 Mar 2016 21:21:00 GMT

Enabling jumbo frames will just allow the switch to process a larger MTU size. It will allow all traffic below that maximum threshold.

RE: Enabling Jumbo Frames on our Core network

Kawawa — Tue, 15 Mar 2016 21:38:00 GMT

In addition to what Patrick said, if an upstream/downstream device receives a Jumbo frame, if fragmentation is not allowed for that stream, that frame is dropped. When this happens, you should see the RX Over and Jumbo packet counters increment when you run the "show ports rxerrors" and "show ports packet" commands.

RE: Enabling Jumbo Frames on our Core network

andreas1 — Wed, 16 Mar 2016 00:07:00 GMT

It will not affect devices that hasn't configured jumbo-rames themself. It only allows clients/devices that has it configured to send jumboframes. So it's totally safe to enable on all ports.