topic MTU on CDOT 8.3 in ONTAP Discussions

MTU on CDOT 8.3

ATAGALLIE — Wed, 04 Jun 2025 18:06:01 GMT

Hello Everyone

If my Broadcast domain has an MTU of 9000, but my ifgrp and ports have MTU 1500 is my resulting MTU 1500? Reason for asking I saw documentation for 8.3 that modifying MTU on a broadcast doamin will change all the ports.

However if i do a vmkping (from ESX host) with a jumbo packet it fails.

When i look at the ports and ifgrp i am seeing MTU of 1500.

Next question, how can i change MTU size of ifgrp and ports without having to delete the lifs? Can i migrate the lifs?

Anthony

Re: MTU on CDOT 8.3

Naveenpusuluru — Mon, 12 Dec 2016 16:29:59 GMT

First check the broadcast domains using below command.

broadcast-domain show

2. Remove ifgrp from broadcast domain.

broadcast-domain remove-ports -broadcast-domain BDname -ports WBNETAPPCL01-01:a0a -ipspace Default

3. Please use the below command to change MTU

network port modify -node WBNETAPPCL01-01 -port a0a -mtu 9000

4. Add them to new broadcast domain

broadcast-domain add-ports -broadcast-domain BDname -ports WBNETAPPCL01-01:a0a -ipspace Default