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ISSU to NX-OS 8.4.1 ISSUE: ISSU upgrade to 8.4(1) on MDS 9710 results with ISL reporting the following from the rest of the fabric Error = Illegal state transition and segmented Symptom: Failure communicating between switches for applications FSPF, CFS, FCNS, and FCS Examples: FSPF: %FSPF-3-FC2_PROC_ERR: %$VSAN 1%$ Error in processing LSA packet on interface port-channel xx, Error = Illegal state transition CFS example: show cfs internal notification log name device-alias` Sun Dec 8 18:46:58 2019: Remote app cap change for 20:00:00:05:73:d9:35:60 Sun Dec 8 18:46:58 2019: Peer add 20:00:00:05:73:d9:35:60 vsan 102, domain 48 Sun Dec 8 18:47:31 2019: Remote app cap change for 20:00:00:de:fb:bd:ba:c0 Sun Dec 8 18:47:31 2019: Peer add 20:00:00:de:fb:bd:ba:c0 vsan 102, domain 50 Sun Dec 8 18:47:37 2019: Peer gone 20:00:00:05:9b:2c:1b:f8 vsan 102, domain 44 Sun Dec 8 18:47:39 2019: Peer gone 20:00:00:3a:9c:02:d1:10 vsan 102, domain 60 Sun Dec 8 18:47:39 2019: Peer gone 20:00:00:de:fb:10:91:a0 vsan 102, domain 58 Sun Dec 8 18:47:39 2019: Peer gone 20:00:00:2a:6a:9e:14:48 vsan 102, domain 56 Sun Dec 8 18:47:39 2019: Peer gone 20:00:00:05:9b:2c:1b:a8 vsan 102, domain 46 In the logs after upgrade: 2019 Dec 8 18:57:40 E11NFCS02 %SYSMGR-SLOT4-5-LC_UPGRADE_START: Starting linecard upgrade 2019 Dec 8 18:57:44 E11NFCS02 %SYSMGR-SLOT4-5-LC_UPGRADE_REBOOT: Non-disruptively rebooting linecard as a part of upgrade 2019 Dec 8 18:58:41 E11NFCS02 %FSPF-3-FC2_PROC_ERR: %$VSAN 102%$ Error in processing LSA packet on interface port-channel22, Error = Illegal state transition *** 2019 Dec 8 18:58:59 E11NFCS02 %SYSMGR-SLOT4-4-READCONF_STARTED: Configuration update started (PID 1118). 2019 Dec 8 18:59:00 E11NFCS02 %SYSMGR-SLOT4-5-RUNTIME_DB_RESTORE_STARTED: Runtime database controller started (PID 1119). .. Continuous Port channel errors as below.... 2019 Dec 9 01:22:42 E11NFCS02 %FSPF-3-FC2_PROC_ERR: %$VSAN 102%$ Error in processing LSA packet on interface port-channel12, Error = Illegal state transition 2019 Dec 9 01:36:27 E11NFCS02 %FSPF-3-FC2_PROC_ERR: %$VSAN 102%$ Error in processing LSA packet on interface port-channel12, Error = Illegal state transition 2019 Dec 9 01:46:09 E11NFCS02 %FSPF-3-FC2_PROC_ERR: %$VSAN 102%$ Error in processing LSA packet on interface port-channel12, Error = Illegal state transition 2019 Dec 9 01:55:11 E11NFCS02 %FSPF-3-FC2_PROC_ERR: %$VSAN 102%$ Error in processing LSA packet on interface port-channel6, Error = Illegal state transition 2019 Dec 9 02:07:27 E11NFCS02 %FSPF-3-FC2_PROC_ERR: %$VSAN 102%$ Error in processing LSA packet on interface port-channel8, Error = Illegal state transition 2019 Dec 9 02:19:28 E11NFCS02 %FSPF-3-FC2_PROC_ERR: %$VSAN 102%$ Error in processing LSA packet on interface port-channel12, Error = Illegal state transition Could be any application where CFS is used for distribution.
Failure of FC2 frames between the switches causing segmentation.
Workaround: Do a system switchover to recover the cfs function. Switchover would recover the fabric segmentation.
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