> On 15 Jan 2015, at 23:16 , Jay Ford <[email protected]> wrote:
> 
> On Thu, 15 Jan 2015, Maarten Carels wrote:
>> Investigation learned however that both the 6500 had static entries in their 
>> MAC address tables for
>> 3333.0001.0002
> 
> That's most likely the result of MLD snooping.  In this case "static" means 
> not "dynamic" (normal traffic-based MAC learning);  the switch put the MAC 
> entry there as part of the MLD snooping mechanism.
> 
> In my experience, MLD snooping is broken in various older hardware & in some 
> software.  You could try disabling it instead of overriding it with your own 
> static MAC entry.
Static entries were my 'workaround'. You directed me to the real cause!
Disabling mld by setting:
no ipv6 mld snooping
removed that idiotic entry

Many thanks, you saved my day!

--maarten

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