topic CLUS LIFs Sharing same port in ONTAP Hardware

CLUS LIFs Sharing same port

ngregory — Wed, 04 Jun 2025 14:35:14 GMT

I just got to a new customer and this is something I found early on... in short, clus1, clus3 and clus4 all show as being homed on e0a for the same node. I see this for other systems where clus1 and clus2 may be the only cluster ports (FAS62xx) and both show homed on e0c, for example.

Vserver Name	Cluster	Cluster	Cluster	Cluster
Logical Interface Name	node1_clus1	node1_clus2	node1_clus3	node1_clus4
Role	cluster	cluster	cluster	cluster
Data Protocol	none	none	none	none
Home Node	node1	node1	node1	node1
Home Port	e0a	e0b	e0a	e0a
Current Node	node1	node1	node1	node1
Current Port	e0a	e0b	e0a	e0a
Operational Status	up	up	up	up
Numeric ID	1024	1023	1035	1034
Is Home	TRUE	TRUE	TRUE	TRUE
Network Address	169.254.2.171	169.254.2.172	169.254.2.173	169.254.2.174
Netmask	255.255.0.0	255.255.0.0	255.255.0.0	255.255.0.0
Administrative Status	up	up	up	up

Any ideas as to why this might be?

Re: CLUS LIFs Sharing same port

ngregory — Tue, 19 Sep 2017 18:22:16 GMT

More info... from ASUP for node1, ifconfig -a section:

e0a: flags=0x1f0c867<UP,BROADCAST,RUNNING,MULTICAST,TCPCKSUM,LRO,CLUSTER_PORT> mtu 9000
	inet 169.254.2.171 netmask 0xffff0000 broadcast 169.254.255.255 noddns CLUSTER	Vserver ID: -3
	inet 169.254.2.173 netmask 0xffff0000 broadcast 169.254.255.255 noddns CLUSTER	Vserver ID: -3
	inet 169.254.2.174 netmask 0xffff0000 broadcast 169.254.255.255 noddns CLUSTER	Vserver ID: -3
	ether 00:a0:98:67:6a:65 (auto-10g_sr-fd-up) flowcontrol none
e0b: flags=0x1f0c867<UP,BROADCAST,RUNNING,MULTICAST,TCPCKSUM,LRO,CLUSTER_PORT> mtu 9000
	inet 169.254.2.172 netmask 0xffff0000 broadcast 169.254.255.255 noddns CLUSTER	Vserver ID: -3
	ether 00:a0:98:67:6a:66 (auto-10g_sr-fd-up) flowcontrol none

Re: CLUS LIFs Sharing same port

andris — Fri, 20 Oct 2017 19:39:43 GMT

I'm curious as to how the FAS62xx ended up with four cluster LIFs in the first place. Best practices only require 2 cluster ports and LIFs.

Regardless, if you really only have 2 cluster ports e0a and e0b, just delete the 2 extra LIFs. Make sure you end up with a cluster LIF home-ported on each port.

See: https://kb.netapp.com/support/s/article/ka31A0000004YpD/How-to-delete-a-Cluster-LIF