Specifications

IP Switching Commands
mls ip cef rpf hw-enable-rpf-acl
ISW-99
Cisco IOS IP Switching Command Reference
May 2008
mls ip cef rpf hw-enable-rpf-acl
To enable hardware unicast Reverse Path Forwarding (uRPF) for packets matching the deny ACL when
uRPF with ACL is enabled, use the mls ip cef rpf hw-enable-rpf-acl command in global configuration
mode. To disable hardware uRPF when RPF and ACL are enabled, use the no form of this command.
mls ip cef rpf hw-enable-rpf-acl
no mls ip cef rpf hw-enable-rpf-acl
Syntax Description This command has no arguments or keywords.
Command Default This command has no default settings.
Command Modes Global configuration
Command History
Usage Guidelines This command is supported on systems configured with a PFC3 (Supervisor Engine 720 and Supervisor
Engine
32) only.
If you do not enter the mls ip cef rpf hw-enable-rpf-acl command, when the uRPF with ACL is
specified, packets that are permitted by the uRPF ACL are forwarded in hardware and the denied packets
are sent to the Multilayer Switching Feature Card (MSFC) for the uRPF check. This command enables
hardware forwarding with the uRPF check for the packets that are denied by the uRPF ACL. However,
in this case packets permitted by the uRPF ACL are sent to the MSFC for forwarding.
Examples This example shows how to enable hardware uRPF when RPF and ACL are enabled:
mls ip cef rpf hw-enable-rpf-acl
This example shows how to disable hardware uRPF when RPF and ACL are enabled:
no mls ip cef rpf hw-enable-rpf-acl
Related Commands
Release Modification
12.2(18)SXF6 This command was introduced.
Command Description
ip verify unicast
source reachable-via
Enables and configures RPF checks with ACL.