Hi, I have recently been looking at upping the MTU across all our switches and devices across one of our sites to 9000+ jumbo frame sizes. After studying the effects of it I don't really see a downside until packets go to be sent to the outside and public Internet were they will hit a brick wall and suffer from fragmentation. I was hoping that PMTU path MTU would kick in on either our edge firewall or router which would tell the original sender to lower the MTU to what can be sent across but will it behave as it should, I don't know yet. Clearly a jumbo frame network wouldn't suffer from fragmentation if all the devices MTU's are synced up on site but its the inevitable brick wall it'll hit on the edge device if it sends a jumbo sized packet that direction.
Anyone any thoughts?
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