Specifications

IP Switching Commands
ip verify unicast reverse-path
ISW-63
Cisco IOS IP Switching Command Reference
May 2008
ip verify unicast reverse-path
Note This command was replaced by the ip verify unicast source reachable-via command effective with
Cisco IOS Release 12.0(15)S. The ip verify unicast source reachable-via command allows for more
flexibility and functionality, such as supporting asymmetric routing, and should be used for any Reverse
Path Forward implementation
To enable Unicast Reverse Path Forwarding (Unicast RPF), use the ip verify unicast reverse-path
command in interface configuration mode. To disable Unicast RPF, use the no form of this command.
ip verify unicast reverse-path [list]
no ip verify unicast reverse-path [list]
Syntax Description
Defaults Unicast RPF is disabled.
Command Modes Interface configuration mode
Command History
list (Optional) Specifies a numbered access control list (ACL) in the following
ranges:
• 1 to 99 (IP standard access list)
• 100 to 199 (IP extended access list)
• 1300 to 1999 (IP standard access list, expanded range)
• 2000 to 2699 (IP extended access list, expanded range)
Release Modification
11.1(CC), 12.0 This command was introduced. This command was not included in
Cisco
IOS Release 11.2 or 11.3
12.1(2)T Added ACL support using the list argument. Added per-interface statistics
on dropped or suppressed packets.
12.0(15) S The ip verify unicast source reachable-via command replaced this
command, and the following keywords were added: allow-default,
allow-self-ping, rx, and any.
12.1(8a)E The ip verify unicast source reachable-via command was integrated into
Cisco
IOS Release 12.1(8a)E.
12.2(13)T The ip verify unicast source reachable-via command was integrated into
Cisco
IOS Release 12.2(13)T.
12.2(14)S The ip verify unicast source reachable-via command was integrated into
Cisco
IOS Release 12.2(14)S.
12.2(33)SRA This command was integrated into Cisco IOS Release 12.2(33)SRA.