IPV6 Mgmt LIFs suddently become unreachable

Yosief — Fri, 25 Apr 2025 01:30:34 GMT

Hello,

Several servers are configured to use NetApp Version 9.9.1P2 as a storage backend. Each server is connected using IPV6 mgmt/data LIFs to its own SVM. Each server deployed Trident CSI to communicate with its own SVM. These configurations have been working fine without any issues for several months. Suddenly, the IPV6 connection got dropped, and the backend appeared offline from the server side:

SVMs with IPV4 mgmt/data LIFs work fine. Only IPV6 is not working.

I can ping the SVM's LIFs gateway IPV6 address but not the mgmt LIF nor the data LIF.

IPv6 is enabled on both cluster nodes:

netapp-cluster-001::> network options ipv6 show

IPv6 Enabled: true
Router Advertisement (RA) Processing Enabled: true

From trident logs:

time="2025-04-24T06:47:15Z" level=error msg="Could not initialize storage driver." crdControllerEvent=add error="error initializing ontap-nas driver; could not create Data ONTAP API client: error creating ONTAP API client: error reading SVM details: Post \"https://[xxxx:xxxx:xxx::2]/servlets/netapp.servlets.admin.XMLrequest_filer\": dial tcp [xxxx:xxxx:xxx::x]:443: connect: no route to host"

time="2025-04-25T01:16:53Z" level=error msg="API invocation failed. Post \"https://[xxxx:xxxx:xxx::2]/servlets/netapp.servlets.admin.XMLrequest_filer\": context deadline exceeded (Client.Timeout exceeded while awaiting headers)"

Any idea what caused the IPV6 connectivity to stop working.

Thank you

Yosief G

Re: IPV6 Mgmt LIFs suddently become unreachable

Yosief — Fri, 25 Apr 2025 17:50:15 GMT

After further investigation, we found that the issue might be within the network between the NetApp and the servers. Will update the outcome.

Re: IPV6 Mgmt LIFs suddently become unreachable

Yosief — Mon, 28 Apr 2025 16:17:34 GMT

No obvious issue found on the network side.

The ping6 from the server to SVM’s ipv6 management LIF sporadically works but not always.

topic Re: IPV6 Mgmt LIFs suddently become unreachable in Network and Storage Protocols

IPV6 Mgmt LIFs suddently become unreachable

Re: IPV6 Mgmt LIFs suddently become unreachable

Re: IPV6 Mgmt LIFs suddently become unreachable