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HSRP question

*Apr 20 11:07:55: %STANDBY-3-DUPADDR: Duplicate address on Vlan114, sourced by 0000.0c07.ac01

this source mac is the virtual mac of HSRP,how does this happen?


Re: HSRP question

Hi Friend,

These error messages do not necessarily indicate an HSRP problem. Rather, the error messages indicate a possible Spanning Tree Protocol (STP) loop or router/switch configuration issue. The error messages are just symptoms of another problem.

In addition, these error messages do not prevent the correct operation of HSRP. The duplicate HSRP packet is ignored. These error messages are throttled at 30-second intervals. However, slow network performance and packet loss can result from the network instability that causes the STANDBY-3-DUPADDR error messages of the HSRP address.

These messages specifically indicate that the router received a data packet that was sourced from the HSRP IP address on VLAN 114 with the MAC address 0000.0c07.ac01. Because the HSRP MAC address is 0000.0c07.ac01, either the router in question received its own packet back or both routers in the HSRP group went into the active state. Because the router received its own packet, the problem most likely is with the network rather than the router. A variety of problems can cause this behavior.

Have a look at his link

Also there are some bugs related to same error message so can you please update the platform and IOS you are running on which you got this error message.

HTH, if yes please rate the post.


Re: HSRP question


the info idicates you would hav set either the standby ip on the vlan interface or vlan interface ip on the standby ip.

switch A

vlan 114

ip address

standby ip

Switch B

vlan 114

ip address

standby ip

this might be the scenario in your case

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