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Forum Discussion

Muhammad_Irfan1's avatar
Muhammad_Irfan1
Icon for Cirrus rankCirrus
Nov 27, 2014

Can not ping any self ip or VS with MTU 1500.

My plate form is F5 LTM 5000s with V 11.4.1. I can not ping any selp ip or vs with ping size 1500 I can ping with 1454 but not with any thing larger. MTU in vlan is configured to 1518. How to solve t...
mk-infra-netops's avatar
mk-infra-netops
Icon for Nimbostratus rankNimbostratus
Apr 20, 2015
I am having the same issue. I cannot ping anything with a 1472 byte packet (plus paylod=1500). It's only going at 1554, like it's getting an extra Ethernet header somewhere. Is this an issue or just the F5 behaving differently by some design than any other Linux machine where 1472 makes it through. This isn't about being able to send more than 1500 bytes, it's about just getting that. Having some performance issues and if the F5 is fragmenting that could explain why we see a considerable delta between going direct to a sever VS to a F5 LTM VIP. Anyone got a good answer for this one. None of the answers so far are actually valid to the problem we are seeing. FYI: Experiencing this is on a Viprion 2100 on a VCMP guest on 11.4.1.