ip verify unicast source reachable-via

To configure Unicast Reverse Path Forwarding (Unicast RPF) on an interface, use the ip verify unicast source reachable-via command. To remove Unicast RPF from an interface, use the no form of this command.

ip verify unicast source reachable-via { any [ allow-default ] | rx }

no ip verify unicast source reachable-via { any [ allow-default ] | rx }

Syntax Description

any
Specifies loose checking.
allow-default
(Optional) Specifies the MAC address to be used on the specified interface.
rx
Specifies strict checking.

Command Default

None

Command Modes

Interface configuration mode

Command History

Release
Modification
5.0(3)N1(1)
This command was introduced.

Usage Guidelines

You can configure one of the following Unicast RPF modes on an ingress interface:

This command does not require a license.

Examples

This example shows how to configure loose Unicast RPF checking on an interface:

switch# configure terminal
switch(config)# interface ethernet 2/3
switch(config-if)# ip verify unicast source reachable-via any
 

This example shows how to configure strict Unicast RPF checking on an interface:

switch# configure terminal
switch(config)# interface ethernet 2/3
switch(config-if)# ip verify unicast source reachable-via rx
 

Related Commands

Command
Description
show ip interface ethernet
Displays the IP-related information for an interface.
show running-config interface ethernet
Displays the interface configuration in the running configuration.
show running-config ip
Displays the IP configuration in the running configuration.