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NetApp Knowledge Base

Adapter timeouts causing lun disconnects

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Votes:
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Category:
ontap-9
Specialty:
san
Last Updated:

Applies to

Issue

  • Hosts lose their access to luns every time there is a host patch update.
  • New FC LIF's created do not come up with operational status up
  • The host is unable to connect to the luns until a TO/GB is done on ONTAP
  • All LUNs are disconnected from the hosts after the Ontap upgrade.
  • Rebooting the hosts does not resolve.
  • Several adaptors on ONTAP are timing out causing disconnection to different hosts
Example:
cluster01::> network fcp adapter show -node node1 -adapter Xa
Error: show failed: Timeout while getting fabric information
cluster01::> network fcp adapter show -node node01 -adapter Xb
Error: show failed: Timeout while getting fabric information
  • MGWD.log timeout messages observed:

Example:[kern_mgwd:info:2548] 0x83771bf00: 0: ERR: SAN::FCP::ADAPTER_KERNEL: src/tables/san/fcp_adapter_internal.cc:get_imp:95 returning: 418/24 - Timeout while getting fabric information
[kern_mgwd:info:2548] 0x83771bf00: 0: ERR: SAN::FCP::ADAPTER: src/tables/san/fcp_adapter.cc:get_imp:719 returning: 418/24 - Timeout while getting fabric information
[kern_mgwd:info:2548] 0x83771bf00: 0: ERR: NET::VIF::SAN: src/tables/san/net_vif_san.cc:populateFcpPortmap:991 Failed getting the FCP port on node netapp01 for lif lif01: Timeout while getting fabric information

  • Bouncing the port from ONTAP temporarily helps, but the issue is back in an hour or two
  • Bouncing the port from the switch does not change anything

 

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