LIF failover policy

[Gbar333]

Hi everybody,
I was wondering if system-defined failover policy won't migrate lifs to a HA partner even if there are only two nodes in a cluster which are in a HA pair.
I came to an understanding that this policy only migrates to local ports or ports on non-HA partner nodes. This is a default policy and sounds problematic in a one HA pair cluster...
Thanks in advance!

[Sahana]

Hi,

Please refer KB https://kb.netapp.com/app/answers/answer_view/a_id/1005606/loc/en_US (requires login)

The following command displays information about the failover targets for all LIFs in a two-node cluster. The Failover Targets row shows the (prioritized) list of node-port combinations for a given LIF.

cluster-1::> network interface show -failover
         Logical       Home                  Failover        Failover
Vserver  Interface     Node:Port             Policy          Group
-------- ------------- --------------------- --------------- ---------
Cluster
         node1_clus1   node1:e0a             local-only      Cluster
                       Failover Targets: node1:e0a,
                                         node1:e0b
         node1_clus2   node1:e0b             local-only      Cluster
                       Failover Targets: node1:e0b,
                                         node1:e0a
         node2_clus1   node2:e0a             local-only      Cluster
                       Failover Targets: node2:e0a,
                                         node2:e0b
         node2_clus2   node2:e0b             local-only      Cluster
                       Failover Targets: node2:e0b,
                                         node2:e0a
cluster1
         cluster_mgmt  node1:e0c             broadcast-domain-wide
                                                             Default
                       Failover Targets: node1:e0c,
                                         node1:e0d,
                                         node2:e0c,
                                         node2:e0d
         node1_mgmt1   node1:e0c             local-only      Default
                       Failover Targets: node1:e0c,
                                         node1:e0d
         node2_mgmt1   node2:e0c             local-only      Default
                       Failover Targets: node2:e0c,
                                         node2:e0d
vs1
         data1         node1:e0e             system-defined  bcast1
                       Failover Targets: node1:e0e,
                                         node1:e0f,
                                         node2:e0e,
                                         node2:e0f

Reference http://docs.netapp.com/ontap-9/index.jsp?topic=%2Fcom.netapp.doc.dot-cm-nmg%2FGUID-964FE956-1687-4255-A5AE-71BB990F5BCF.html

[Gbar333]

First of all thank you for replying!
Your comment doesn't state explicitly whether system defined policy would allow migrating lifs to ha partner in a one HA pair cluster. The valid ports for migration are a combination of the failover group and the restriction enforced by the policy. It is still not 100% clear to me if it would allow the migration stated above. I came to an understanding that this policy surely won't allow migration to a ha partner in a multinode cluster. It would help me greatly if anyone can find out if the above mentioned migration is possible.
Thanks in advance!

[wareer]

IF failover refers to the automatic migration of a LIF to a different network port in response to a link failure on the LIF's current port. This is a key component to providing high availability for the connections to SVMs. Configuring LIF failover involves creating a failover group, modifying the LIF to use the failover group, and specifying a failover policy.

A failover group contains a set of network ports (physical ports, VLANs, and interface groups) from one or more nodes in a cluster. The network ports that are present in the failover group define the failover targets available for the LIF. A failover group can have cluster management, node management, intercluster, and NAS data LIFs assigned to it.When you create a broadcast domain, a failover group of the same name is created automatically that contains the same network ports. This failover group is automatically managed by the system, meaning that as ports are added or removed from the broadcast domain, they are automatically added or removed from this failover group. This is provided as an efficiency for administrators who do not want to manage their own failover groups.You can refer to the links below：https://docs.netapp.com/us-en/ontap/networking/configure_failover_groups_and_policies_for_lifs_overview.html