From: Sarastra Maya on
Any way to troubleshoot this error? Any idea what this is?


Apr 24 23:36:14 CDT: %STANDBY-3-DUPADDR: Duplicate address
192.168.24.4 on Vlan1
0, sourced by 00d0.015d.2ffc
Apr 24 23:36:44 CDT: %STANDBY-3-DUPADDR: Duplicate address
192.168.57.4 on Vlan6
2, sourced by 0000.0c07.ac00
Apr 24 23:37:20 CDT: %STANDBY-3-DUPADDR: Duplicate address
192.168.82.4 on Vlan2
3, sourced by 00d0.015d.2ffc
Apr 24 23:37:55 CDT: %STANDBY-3-DUPADDR: Duplicate address
192.168.18.4 on Vlan7
, sourced by 0000.0c07.ac00]

Thanks!

From: Thrill5 on
On VLAN 6 and VLAN 7 it could be that the standby group is not the same on
both routers running HSRP. VLAN 1 and VLAN2 are sourced with the same MAC
address, so this is the same router. Looks like you have an VLAN 1 and VLAN
2 being bridged together somewhere.

Scott


"Sarastra Maya" <k40n30(a)gmail.com> wrote in message
news:1177942933.248102.210280(a)y80g2000hsf.googlegroups.com...
> Any way to troubleshoot this error? Any idea what this is?
>
>
> Apr 24 23:36:14 CDT: %STANDBY-3-DUPADDR: Duplicate address
> 192.168.24.4 on Vlan1
> 0, sourced by 00d0.015d.2ffc
> Apr 24 23:36:44 CDT: %STANDBY-3-DUPADDR: Duplicate address
> 192.168.57.4 on Vlan6
> 2, sourced by 0000.0c07.ac00
> Apr 24 23:37:20 CDT: %STANDBY-3-DUPADDR: Duplicate address
> 192.168.82.4 on Vlan2
> 3, sourced by 00d0.015d.2ffc
> Apr 24 23:37:55 CDT: %STANDBY-3-DUPADDR: Duplicate address
> 192.168.18.4 on Vlan7
> , sourced by 0000.0c07.ac00]
>
> Thanks!
>


From: Andrey Tarasov on
Sarastra Maya wrote:
> Any way to troubleshoot this error? Any idea what this is?
>
>
> Apr 24 23:36:14 CDT: %STANDBY-3-DUPADDR: Duplicate address
> 192.168.24.4 on Vlan1
> 0, sourced by 00d0.015d.2ffc
> Apr 24 23:36:44 CDT: %STANDBY-3-DUPADDR: Duplicate address
> 192.168.57.4 on Vlan6
> 2, sourced by 0000.0c07.ac00
> Apr 24 23:37:20 CDT: %STANDBY-3-DUPADDR: Duplicate address
> 192.168.82.4 on Vlan2
> 3, sourced by 00d0.015d.2ffc
> Apr 24 23:37:55 CDT: %STANDBY-3-DUPADDR: Duplicate address
> 192.168.18.4 on Vlan7
> , sourced by 0000.0c07.ac00]

Classical case of loop at layer 2. Check your spanning tree configuration.

Andrey.
From: Sarastra Maya on
Thanks guys!

I also want to point out that I have 3 core switches (running HSRP)..

Now this is very likely as Andrey pointed out ....spanning tree issue.
I just need to know best way to fix it...now :)

From: Andrey Tarasov on
Sarastra Maya wrote:
> Thanks guys!
>
> I also want to point out that I have 3 core switches (running HSRP)..
>
> Now this is very likely as Andrey pointed out ....spanning tree issue.
> I just need to know best way to fix it...now :)

Since you didn't mention complete network meltdown, my guess is it's
some kind of transient issue. Make sure you don't have switches running
with high CPU utilization, switches with more VLANs that they can
support STP instances for, etc.

Here is nice article at cisco.com -

http://cisco.com/en/US/tech/tk389/tk621/technologies_tech_note09186a0080136673.shtml

Regards,
Andrey.