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Software Configuration Guide—Release 15.0(2)SG
OL-23818-01
Chapter 8 Configuring Supervisor Engine Redundancy Using RPR and SSO
Supervisor Engine Redundancy Guidelines and Restrictions
C4K_REDUNDANCY-2-IOS_VERSION_CHECK_FAIL and
ISSU-3-PEER_IMAGE_INCOMPATIBLE messages to appear because the peer image is listed as
incompatible. If the configuration problem can be corrected, you can clear the peer image from the
incompatible list with the redundancy config-sync ignore mismatched-commands EXEC
command while the peer is in a standby cold (RPR) state. This action allows the standy supervisor
engine to boot in standby hot (SSO) state when it reloads.
Here are the steps:
Step 1 Clear the offending configuration (that caused an MCL) while the standby supervisor engine is in
standby cold (RPR) state.
Step 2 Enter the redundancy config-sync ignore mismatched-commands EXEC command at the active
standby supervisor engine.
Step 3 Perform write memory.
Step 4 Reload the standy supervisor engine with the redundancy reload peer command.
• If you configure Supervisor Engine V-10GE to use both Gigabit Ethernet and 10-Gigabit Ethernet
uplinks without WS-X4302-GB in slot 10, module 10 is disabled and you cannot rollback the
configuration to use gigabit ports.
Enter the following commands to recover:
config t
hw-module uplink select tengigabitethernet // This sets the switch back to default
mode
!
ctrl z
wr me
redundancy reload shelf // The switch will reload with all 10 modules working ok
//The switch reloads
config t
hw-module uplink select gigabitethernet // This sets the switch to the desired link
!
ctrl z
wr me
redundancy reload shelf // The switch reloads with module 10 active with the gigabit
ethernet port(s) ON and the ten gigabit ethernet port(s) Off
• RPR requires Cisco IOS Release 12.1(12c)EW, Release 12.1(19)E or later releases. SSO requires
Cisco IOS Release 12.2(20)EWA or later releases.
• The Catalyst 4507R switch and the 4510R switch are the only Catalyst 4500 series switches that
support supervisor engine redundancy.
• The Catalyst 4510R series switch only supports the WS-X4516 and WS-X4516-10GE supervisor
engines. The Catalyst 4507R series switch supports supervisor engines WS-X4013+,
WS-X4013+10GE, WS-X4515, WS-X4516, and WS-X4516-10GE.
• In Cisco IOS Release 12.2(25)SG and later releases on a Catalyst 4507R series switch, 10-Gigabit
Ethernet and Gigabit Ethernet uplinks are concurrently usable on the Supervisor Engine V-10GE
(WS-X4516-10GE) and the Supervisor Engine II+10GE (WS-4013+10GE). In Cisco IOS releases
earlier than 12.2(25)SG, you need to use the hw-module uplink select configuration command to
select either the 10-Gigabit Ethernet or Gigabit Ethernet uplinks.