My customer Cat65 VSS switches down due to power.
The standby Cat65 was failed, I convert it to standby then back to VSS.
The standby Cat65 got the following messages then to rommon>
"cisco IOS Software, s72033_sp Software (s72033_sp-ADVENTERPRISEK9-M), Version 12
.2(33)SXI5, RELEASE SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2010 by Cisco Systems, Inc.
Compiled Sat 23-Oct-10 02:08 by prod_rel_team
Image text-base: 0x40101328, data-base: 0x4231C7C0
System detected Virtual Switch configuration...
Interface TenGigabitEthernet 2/5/4 is member of PortChannel 20
Interface TenGigabitEthernet 2/5/5 is member of PortChannel 20
Active crashed three times, disabling auto-boot and dropping to rommon"
This is the messages on standby Cat65:
*Jul 20 23:42:28.571: %SYS-SW2_SPSTBY-5-RELOAD: Reload requested - From Active S
witch (Reload peer unit).
*Jul 20 23:42:30.083: %VSLP-SW2_SPSTBY-3-VSLP_LMP_FAIL_REASON: 5/4 : Link down
*Jul 20 23:42:30.087: %VSLP-SW2_SPSTBY-3-VSLP_LMP_FAIL_REASON: 5/5 : Link down
*Jul 20 23:42:30.087: %VSLP-SW2_SPSTBY-2-VSL_DOWN: Last VSL interface 5/5 we
nt down
*Jul 20 23:42:30.091: %VSLP-SW2_SPSTBY-2-VSL_DOWN: All VSL links went down whi
le switch is in Standby role
*Jul 20 23:42:30.119: %SATVS_IBC-SW2_SPSTBY-5-VSL_DOWN_SCP_DROP: VSL inactive -
dropping cached SCP packet: (SA/DA:0x4/0x4, SSAP/DSAP:0x2/0x1, OP/SEQ:0x1E/0x15,
SIG/INFO:0x1/0x502, eSA:0000.0500.0000)
*Jul 20 23:42:31.231: %SYS-SW2_SPSTBY-5-RELOAD: Reload requested by Delayed Relo
ad. Reload Reason: Reason unspecified.
The 10G port 5/4,5/5 TenGBIC and cables is good and connected.