topic HA pair FC single path per controller question in ONTAP Hardware https://community.netapp.com/t5/ONTAP-Hardware/HA-pair-FC-single-path-per-controller-question/m-p/36211#M2505 <HTML><HEAD></HEAD><BODY><P>Hello,</P><P></P><P>We have recently adquired a FAS2240 dual controller running 8.2P2, options cf.takeover as follow on both nodes:</P><P></P><P>cf.takeover.bypass_optimization off</P><P>cf.takeover.change_fsid&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; on</P><P>cf.takeover.detection.seconds 15</P><P>cf.takeover.on_disk_shelf_miscompare off</P><P>cf.takeover.on_failure&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; on</P><P>cf.takeover.on_network_interface_failure off</P><P>cf.takeover.on_network_interface_failure.policy all_nics&nbsp;&nbsp; (same value in local+partner recommended)</P><P>cf.takeover.on_panic&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; on</P><P>cf.takeover.on_reboot&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; off</P><P>cf.takeover.on_short_uptime&nbsp; on</P><P>cf.takeover.use_mcrc_file&nbsp;&nbsp;&nbsp; off&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (value might be overwritten in takeover)</P><P></P><P>cf.takeover.bypass_optimization off</P><P>cf.takeover.change_fsid&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; on</P><P>cf.takeover.detection.seconds 15</P><P>cf.takeover.on_disk_shelf_miscompare off</P><P>cf.takeover.on_failure&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; on</P><P>cf.takeover.on_network_interface_failure off</P><P>cf.takeover.on_network_interface_failure.policy all_nics&nbsp;&nbsp; (same value in local+partner recommended)</P><P>cf.takeover.on_panic&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; on</P><P>cf.takeover.on_reboot&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; off</P><P>cf.takeover.on_short_uptime&nbsp; on</P><P>cf.takeover.use_mcrc_file&nbsp;&nbsp;&nbsp; off&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (value might be overwritten in takeover)</P><P></P><P>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Local</P><P>Adapter Type&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; State&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Status</P><P>---------------------------------------------------</P><P>&nbsp; 1a&nbsp;&nbsp; initiator&nbsp; CONFIGURED.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; offline</P><P>&nbsp; 1b&nbsp;&nbsp; target&nbsp;&nbsp;&nbsp;&nbsp; CONFIGURED&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; online</P><P></P><P>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Local</P><P>Adapter Type&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; State&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Status</P><P>---------------------------------------------------</P><P>&nbsp; 1a&nbsp;&nbsp; initiator&nbsp; CONFIGURED.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; offline</P><P>&nbsp; 1b&nbsp;&nbsp; target&nbsp;&nbsp;&nbsp;&nbsp; CONFIGURED&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; online</P><P></P><P>We presented a 50GB LUN to a Linux box, when we do disconnect the FC cable from one of the controllers, the one that owns a LUN, it does not automatically failover to the other controller but instead the Linux box stops seeing the LUN.</P><P></P><P>is it possible to have the HA configuration takeover when a FC link is down? We have a single path per controller, so if we loose that path everything goes down.</P><P></P><P>Thank you</P></BODY></HTML> Thu, 05 Jun 2025 05:53:52 GMT datamethz 2025-06-05T05:53:52Z HA pair FC single path per controller question https://community.netapp.com/t5/ONTAP-Hardware/HA-pair-FC-single-path-per-controller-question/m-p/36211#M2505 <HTML><HEAD></HEAD><BODY><P>Hello,</P><P></P><P>We have recently adquired a FAS2240 dual controller running 8.2P2, options cf.takeover as follow on both nodes:</P><P></P><P>cf.takeover.bypass_optimization off</P><P>cf.takeover.change_fsid&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; on</P><P>cf.takeover.detection.seconds 15</P><P>cf.takeover.on_disk_shelf_miscompare off</P><P>cf.takeover.on_failure&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; on</P><P>cf.takeover.on_network_interface_failure off</P><P>cf.takeover.on_network_interface_failure.policy all_nics&nbsp;&nbsp; (same value in local+partner recommended)</P><P>cf.takeover.on_panic&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; on</P><P>cf.takeover.on_reboot&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; off</P><P>cf.takeover.on_short_uptime&nbsp; on</P><P>cf.takeover.use_mcrc_file&nbsp;&nbsp;&nbsp; off&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (value might be overwritten in takeover)</P><P></P><P>cf.takeover.bypass_optimization off</P><P>cf.takeover.change_fsid&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; on</P><P>cf.takeover.detection.seconds 15</P><P>cf.takeover.on_disk_shelf_miscompare off</P><P>cf.takeover.on_failure&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; on</P><P>cf.takeover.on_network_interface_failure off</P><P>cf.takeover.on_network_interface_failure.policy all_nics&nbsp;&nbsp; (same value in local+partner recommended)</P><P>cf.takeover.on_panic&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; on</P><P>cf.takeover.on_reboot&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; off</P><P>cf.takeover.on_short_uptime&nbsp; on</P><P>cf.takeover.use_mcrc_file&nbsp;&nbsp;&nbsp; off&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (value might be overwritten in takeover)</P><P></P><P>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Local</P><P>Adapter Type&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; State&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Status</P><P>---------------------------------------------------</P><P>&nbsp; 1a&nbsp;&nbsp; initiator&nbsp; CONFIGURED.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; offline</P><P>&nbsp; 1b&nbsp;&nbsp; target&nbsp;&nbsp;&nbsp;&nbsp; CONFIGURED&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; online</P><P></P><P>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Local</P><P>Adapter Type&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; State&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Status</P><P>---------------------------------------------------</P><P>&nbsp; 1a&nbsp;&nbsp; initiator&nbsp; CONFIGURED.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; offline</P><P>&nbsp; 1b&nbsp;&nbsp; target&nbsp;&nbsp;&nbsp;&nbsp; CONFIGURED&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; online</P><P></P><P>We presented a 50GB LUN to a Linux box, when we do disconnect the FC cable from one of the controllers, the one that owns a LUN, it does not automatically failover to the other controller but instead the Linux box stops seeing the LUN.</P><P></P><P>is it possible to have the HA configuration takeover when a FC link is down? We have a single path per controller, so if we loose that path everything goes down.</P><P></P><P>Thank you</P></BODY></HTML> Thu, 05 Jun 2025 05:53:52 GMT https://community.netapp.com/t5/ONTAP-Hardware/HA-pair-FC-single-path-per-controller-question/m-p/36211#M2505 datamethz 2025-06-05T05:53:52Z Re: HA pair FC single path per controller question https://community.netapp.com/t5/ONTAP-Hardware/HA-pair-FC-single-path-per-controller-question/m-p/36216#M2506 <HTML><HEAD></HEAD><BODY><P>Yes, it's possible. You need to connect host to both filer heads. There is no filer level failover when FC connection breaks - hosts at use supported multipathing software to handle it.</P></BODY></HTML> Mon, 16 Sep 2013 17:04:47 GMT https://community.netapp.com/t5/ONTAP-Hardware/HA-pair-FC-single-path-per-controller-question/m-p/36216#M2506 aborzenkov 2013-09-16T17:04:47Z