topic Re: Does modifying port parameters ((MTU, Auto-Negotiation, Duplex, Speed) is disruptive? in ONTAP Discussions

Does modifying port parameters ((MTU, Auto-Negotiation, Duplex, Speed) is disruptive?

jerin1982 — Tue, 05 Feb 2019 21:31:42 GMT

Does modifying port parameters (MTU, Auto-Negotiation, Duplex, Speed) is disruptive? If so why? The ports are part of an interface group. One port is up and the other port part of the ifgrp is down.

Re: Does modifying port parameters ((MTU, Auto-Negotiation, Duplex, Speed) is disruptive?

SpindleNinja — Wed, 06 Feb 2019 02:15:19 GMT

I always evauate all lifs on any port/ifgrp/vlan i'm messing with, just move them back when you're finished.

There's a blip for sure when you mess with MTU, can't recall off the top of my head on the others. But when in double, just move the lif(s) off.

Re: Does modifying port parameters ((MTU, Auto-Negotiation, Duplex, Speed) is disruptive?

jerin1982 — Fri, 08 Feb 2019 10:40:06 GMT

Thank you so much. In this case, we are not going to change the MTU. But will ensure that no lifs are hosted during this change.

Re: Does modifying port parameters ((MTU, Auto-Negotiation, Duplex, Speed) is disruptive?

SpindleNinja — Fri, 08 Feb 2019 14:01:04 GMT

You can still proably do it non-disruptivly. Just move your lifs around.

Re: Does modifying port parameters ((MTU, Auto-Negotiation, Duplex, Speed) is disruptive?

wareer — Thu, 13 Mar 2025 01:17:14 GMT

https://docs.netapp.com/us-en/ontap/networking/modify_mtu_setting_for_interface_group_ports.html It is not recommended to modify the administrative settings of the 100 GbE, 40 GbE, 10 GbE or 1 GbE network interfaces.
The values that you set for duplex mode and port speed are referred to as administrative settings. Depending on network limitations, the administrative settings can differ from the operational settings (that is, the duplex mode and speed that the port actually uses).
It is not recommended to modify the administrative settings of the underlying physical ports in an interface group.
The parameter (available at the advanced privilege level) modifies the administrative settings of the port.-up-admin
It is not recommended to set the administrative setting to false for all ports on a node, or for the port that hosts the last operational cluster LIF on a node.-up-admin
It is not recommended to modify the MTU size of the management port, .e0M
The MTU size of a port in a broadcast domain cannot be changed from the MTU value that is set for the broadcast domain.
The MTU size of a VLAN cannot exceed the value of the MTU size of its base port.

If you want to change the mtu, you must stop the service first, or you can migrate the lif to complete the uninterrupted change