Specifications

IP Switching Commands
clear cef linecard
ISW-11
Cisco IOS IP Switching Command Reference
May 2008
clear cef linecard
To clear Cisco Express Forwarding information from line cards, use the clear cef linecard command in
user EXEC or privileged EXEC mode.
clear cef linecard [slot-number] [adjacency | interface | prefix]
Syntax Description
Command Modes User EXEC
Privileged EXEC
Command History
Usage Guidelines This command is available only on distributed platforms (such as the Cisco 7500 series) running
distributed Cisco Express Forwarding.
Cisco Express Forwarding information on the line cards is cleared; however, Cisco Express Forwarding
information on the Route Processor (RP) is not affected.
After you clear Cisco Express Forwarding information from line cards, the corresponding information
from the RSP is propagated to the line cards. Interprocess communications (IPC) ensures that
Cisco Express Forwarding information on the Route Switch Processor (RSP) matches the Cisco Express
Forwarding information on the line cards.
Because this command might require significant processing resources and can cause dropped traffic or
system error messages about excessive CPU use, it’s use is recommended only as a last resort for
debugging or mitigating serious problems.
slot-number (Optional) Line card slot number to clear. When you omit this argument, all
line card slots are cleared.
adjacency (Optional) Clears line card adjacency tables and rebuilds adjacency for the
specified line card.
interface (Optional) Clears line card interface information and recreates the interface
information for the specified line card.
prefix (Optional) Clears line card prefix tables and starts rebuilding the
Forwarding Information Base (FIB) table.
Release Modification
11.2GS This command was introduced to support the Cisco 12012 Internet router.
11.1CC Support was added for multiple platforms.
12.2(25)S This command was integrated into Cisco IOS Release 12.2(25)S.
12.2(28)SB This command was integrated into Cisco IOS Release 12.2(28)SB and
implemented on the Cisco 7000 series router. This command is not supported
on the Cisco 10000 series router.
12.2(33)SRA This command was integrated into Cisco IOS Release 12.2(33)SRA.
12.2(33)SXH This command was integrated into Cisco IOS Release 12.2(33)SXH.