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Adapter timeouts causing lun disconnects

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Category:
ontap-9
Specialty:
san
Last Updated:

Applies to

Issue

  • LIF registration with Fabric name server manager is not "NS Registration Done" , may see timeout or failed

net int show -vserver * -data-protocol fcp -fields status-oper,status-extended

  • Hosts lose LUN after reboot
  • New FC LIF's created do not come up with operational status up
  • Host unable to connect to LUN until takeover (TO)/ Giveback (GB)   done on ONTAP
  • LUN disconnected from hosts after ONTAP upgrade
  • Rebooting host does not resolve issue
  • Initiator will report  not logged in state

A22xxxG1::*> igroup show COKHCH1xx10 -v
              Vserver Name: sxx0
               Igroup Name: COKHCxxL10
                  Protocol: mixed
                   OS Type: vmware
    Portset Binding Igroup: -
                Initiators: 50:0x:0x:00:0x:cx:7e:2x
                            50:0x:0x:00:0x:cx:7e:2x
             Child Igroups: -
               Igroup UUID: c5ec904e-18xx-11ed-bbxx-d039ea903bxx
                      ALUA: true
                Initiators: 50:0x:0x:00:0x:cx:7e:2x (not logged in)
                            50:0x:0x:00:0x:cx:7e:2x (logged in)
              Vserver UUID: 2ef579xx-18b5-11xx-bbxx-d039ea903bxx
          ...
              Igroup Comment:

  • Several adaptors on ONTAP report timeout causing disconnection to multiple 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

  • Down/UP  port from ONTAP temporarily resolves, but the issue returns in an hour or two
  • Down/UP port at the switch side does not resolve

 

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