From: Ben (ccieben@cox.net)
Date: Fri Feb 16 2007 - 16:07:46 ART
I agree - I just tested it with Dynamips and saw the GARP in Ethereal as
I changed the MAC.
Ben
Jian Gu wrote:
> I guess when you change MAC address of router, the router will send out GARP
> packets.
>
> On 2/16/07, Stefan Grey <examplebrain@hotmail.com> wrote:
>
>> Well guys when I configured this on the switch I have mentioned the
>> strange
>> thing. Maybe you could test this... or tell why the following heppens??
>>
>> PC--- Switchfa0/1 - fa0/0-router.
>>
>> on the switch fa0/1 interface is configured:
>> switchport mode acc
>> sw port-security
>> sw port-security maximum-mac 1.
>> sw port-security violate shutdown
>>
>> Than although I didn't do anything the mac address entry for fa0/0
>> interface
>> of the router appears in the CAM table of the router. I change the Mac on
>> the interface of the router... the interface of the switch goes in the
>> shutdown mode. I just wonder how the switch makes the entries in its CAM
>> table?? NO packets are sent through the network. Well I thought maybe its
>> due CDP frames.. but I disabled it and the behaviour is still the same.
>> How
>> does the switch make an entry for the router in its CAM table?? (Are there
>> any frames inbetween excep CDP about which I don't know??)
>>
>> Any thoughts??
>>
>> Thanks.
>>
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