[c-nsp] About duplicate message

[Hiromasa Sekiguchi]

Hi,

The customer uses two cat3750 as stack.

Suddenly slave switch was removed from stack and reset.
I think the cause of this phenomenon is failure of stack cable or failure slave switch.

I have a question.
Before slave switch was removed from stack,
the duplicate message was generated.

--- snip ---
%IP-4-DUPADDR: Duplicate address A.B.C.D on Vlan1000, sourced by ****.****.****.
%STACKMGR-6-SWITCH_REMOVED: Switch 2 has been REMOVED from the stack
--- snip ---

Why is it generated?
The Vlan1000 and ip address A.B.C.D is configured.
HSRP is not configured in the boxes.

The mac address couldn't find in customer site...

Regards,
Hiromasa