Duplicate Address query

dan_track · ‎08-23-2007

Hi

I'm getting lots of these error msgs. Are these genuine or could these be created by HSRP in anyway?

Aug 23 10:56:06 10.3.3.3 50523: *Mar 22 23:27:38: %HSRP-4-DUPADDR: Duplicate address 10.1.3.3 on Vlan2, sourced by 0011.93d2.8c42

Thanks

Dan

massimiliano.serafino · ‎08-23-2007

From 12.3 T System Guide: http://www.cisco.com/en/US/products/sw/iosswrel/ps5207/products_system_message_guide_chapter09186a0080228540.html#wp780949

%HSRP-4-DUPADDR : Duplicate address [IP_address] on [chars], sourced by [enet]

Explanation

The IP address in an HSRP message that was received on the specified interface is the same as the IP address of the router. Another router might be configured with the same IP address. The most likely cause of this condition is a network loop or a misconfigured switch that is causing the router to see its own HSRP hello messages.

Recommended Action

Check the configurations on all the HSRP routers to ensure that the interface IP addresses are unique. Make sure that no network loops exist. If port channels are configured, check that the switch is correctly configured for port channels. Enter the standby use-bia command so that the error message displays the interface MAC address of the sending router, which can be used to determine if the error message is caused by a misconfigured router or a network loop.

I hope this helps.

Best regards.

Massimiliano.