May I ask why the Standby on the C9404R rebooted suddenly. Please see logs below.
May 30 17:18:51 PST: %IOSXE_OIR-6-REMCARD: Card (cc) removed from chassis 2 slot 1
May 30 17:18:51 PST: %IOSXE_OIR-6-REMCARD: Card (cc) removed from chassis 2 slot 2
May 30 17:18:51 PST: %IOSXE_OIR-6-REMCARD: Card (cc) removed from chassis 2 slot 3
May 30 17:18:51 PST: %IOSXE_OIR-6-REMCARD: Card (cc) removed from chassis 2 slot 4
May 30 17:18:51 PST: %IOSXE_PEM-6-REMPEM_FM: PEM/FM chassis 2 slot P1 removed
May 30 17:18:51 PST: %IOSXE_PEM-6-REMPEM_FM: PEM/FM chassis 2 slot P2 removed
May 30 17:18:51 PST: %IOSXE_PEM-6-REMPEM_FM: PEM/FM chassis 2 slot P3 removed
May 30 17:18:51 PST: %IOSXE_PEM-6-REMPEM_FM: PEM/FM chassis 2 slot P4 removed
May 30 17:18:51 PST: %IOSXE_PEM-6-REMPEM_FM: PEM/FM chassis 2 slot P9 removed
May 30 17:18:51 PST: %IOSXE_OIR-6-REMSPA: SPA removed from chassis 2 subslot 1/0, interfaces disabled
May 30 17:18:51 PST: %IOSXE_OIR-6-REMSPA: SPA removed from chassis 2 subslot 2/0, interfaces disabled
May 30 17:18:51 PST: %IOSXE_OIR-6-REMSPA: SPA removed from chassis 2 subslot 4/0, interfaces disabled
May 30 17:18:51 PST: %REDUNDANCY-3-STANDBY_LOST: Standby processor fault (PEER_NOT_PRESENT)
May 30 17:18:51 PST: %REDUNDANCY-3-STANDBY_LOST: Standby processor fault (PEER_DOWN)
May 30 17:18:51 PST: %REDUNDANCY-3-STANDBY_LOST: Standby processor fault (PEER_REDUNDANCY_STATE_CHANGE)
May 30 17:18:51 PST: %SPA_OIR-6-OFFLINECARD: SPA (C9400-LC-48S) offline in chassis 2 subslot 1/0
May 30 17:18:51 PST: %SPA_OIR-6-OFFLINECARD: SPA (C9400-SUP-1XL) offline in chassis 2 subslot 2/0
May 30 17:18:51 PST: %STACKMGR-6-CHASSIS_REMOVED: Chassis 1 R0/0: stack_mgr: Chassis 2 has been removed from the stack.
May 30 17:18:52 PST: %SPA_OIR-6-OFFLINECARD: SPA (C9400-LC-48S) offline in chassis 2 subslot 4/0
May 30 17:18:52 PST: %RF-5-RF_RELOAD: Peer reload. Reason: EHSA standby down
May 30 17:18:52 PST: %IOSXE_REDUNDANCY-6-PEER_LOST: Active detected switch 2 is no longer standby
show version
Cisco IOS XE Software, Version 16.09.03
Cisco IOS Software [Fuji], Catalyst L3 Switch Software (CAT9K_IOSXE), Version 16.9.3, RELEASE SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2019 by Cisco Systems, Inc.
