Specifications

IP Switching Commands
switchover pxf restart
ISW-348
Cisco IOS IP Switching Command Reference
May 2008
switchover pxf restart
To configure the number of parallel express forwarding (PXF) restarts that are allowed before a
switchover to a redundant Performance Routing Engine (PRE) module, use the switchover pxf restart
command in redundancy configuration (main-cpu) mode. To reset the router to the default values, use
the no form of this command.
switchover pxf restart number-of-restarts time-period
no switchover pxf restart
Syntax Description
Defaults 2 PXF restarts within 5 hours
Command Modes Redundancy configuration, main-cpu mode
Command History
Usage Guidelines The startup and running configurations of the standby PRE are synchronized with the active PRE,
ensuring the fastest possible cut-over time if the active PRE fails. A second switchover is prevented for
2 hours if a PXF restart occurs on the new active PRE.
A PXF restart following a PXF fault may restore service more quickly when the features in use are not
configured for nonstop forwarding with stateful switchover (NSF/SSO), or when SSO mode is not configured
on the router. Conversely, a PRE switchover in response to a PXF restart may restore service more quickly
when NSF/SSO is configured on the router and all configured features support NSF/SSO.
When a switchover occurs because of repeated PXF restarts, the router displays the following system
message:
C10KEVENTMGR-3-PXF_FAIL_SWITCHOVER: Multiple PXF failures, switchover to redundant PRE
initiated.
number-of-restarts The number of PXF restarts that are allowed within the specified time period.
If the PXF processors restart this many times within the given time period,
the router switches over to the redundant PRE module. The valid range is 1
to 25.
time-period Time period, in hours, that PXF restart counts are monitored. The valid range
is 0 to 120 hours.
Note A value of 0 specifies that a switchover occurs on the configured
number-of-restarts regardless of the time period.
Release Modification
12.2(15)BC2 This command was introduced on the Cisco uBR10012 router.
12.3(7) This command was introduced on the Cisco 10000 series router and
integrated into Cisco IOS Release 12.3(7).
12.2SB This command was integrated into Cisco IOS Release 12.2SB.