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New Member

IP VERIFY UNICAST REVERSE-PATH

Hi everybody,

Please can someone tell what the above command "ip verify unicast reverse-path" does or achieves on a router interface. I discovered that when it is set on an interface I cannot ping the interface.

I was wondering if it is a security device, if disabling it will have any adverse security risk to my network.

Thanks

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Cisco Employee

Re: IP VERIFY UNICAST REVERSE-PATH

Tom,

Below is an excellent document that should answer most of your questions on URPF.

http://www.cisco.com/en/US/docs/ios/11_1/feature/guide/uni_rpf.html#wp1042332

Regards,

Arul

*Pls rate if it helps*

2 REPLIES
New Member

Re: IP VERIFY UNICAST REVERSE-PATH

Hey,

It is a security hardening command which can check the integrity of the source ip address. it protects from attacks like ip spoofing and all. a number of common types of denial-of-service (DoS) attacks, including Smurf and Tribe Flood Network (TFN), can take advantage of spoofed or rapidly changing source IP addresses. I hope i have helped a little. if you find anymore info do let me know

Thanks and Regards,

Srinath Muralidharan

Cable&Wireless

+91 99809 30364

Cisco Employee

Re: IP VERIFY UNICAST REVERSE-PATH

Tom,

Below is an excellent document that should answer most of your questions on URPF.

http://www.cisco.com/en/US/docs/ios/11_1/feature/guide/uni_rpf.html#wp1042332

Regards,

Arul

*Pls rate if it helps*

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