[c-nsp] Duplicate IP add on CAt6509

[Dave Lim]

Yes, I am.

On 2/12/07, Hyunseog Ryu <r.hyunseog at ieee.org> wrote:
>
> Are you using HSRP?
>
> Hyun
>
> Dave Lim wrote:
> > Anyone have faced this log message of duplicate IP address before?
> >
> > Here is the network topology
> >
> > C6509CS01 --------------- C6509CS02
> > ---------------
> >
> > This problem occured for 5 min and brought the customer vlan 1 network.
> Note
> > that the
> >
> > C6509CS01
> > Feb 8 08:08:32: %STANDBY-3-DUPADDR: Duplicate address 10.1.1.253 on
> Vlan1,
> > sourced by 0000.0c07.ac09
> >
> > VLAN 1 MAC address on C6509CS01
> > Vlan1 is up, line protocol is up
> > Hardware is Cat6k RP Virtual Ethernet, address is 0009.b63e.cffc (bia
> > 0009.b63
> >
> > C6509CS02
> > *Feb 9 01:29:49: %STANDBY-3-DUPADDR: Duplicate address 10.1.1.252 on
> Vlan1,
> > sourced by 0009.b63e.bffc
> >
> > VLAN 1 MAC address on C6509CS02
> > Vlan1 is up, line protocol is up
> > Hardware is Cat6k RP Virtual Ethernet, address is 0009.b63e.bffc (bia
> > 0009.b63e.bffc)
> > Internet address is 10.1.1.252/24
> >
> > I am suspecting this is a spanning tree loop and causes the switch to
> see a
> > duplicate IP address. But logically, there is no loop between the 2 6509
> > unless the port-channel connecting the 2 switches fail and in turns
> there is
> > a loop. But in this cases, STP should kick in.
> > _______________________________________________
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> >
> >
> >
> >
>
>
>