[j-nsp] EX4550 - global or per-vlan mac table?

[Jeff]

Hi,

thanks for the quick reply. Do you think a static entry on any vlan for 
the router mac will overwrite any dynamically learned (same) mac from a 
different vlan?


Thanks!

Am 22.08.2016 um 12:04 schrieb Sebastian Wiesinger:
> * Jeff <Jeff.Meyers at gmx.net> [2016-08-22 10:45]:
>> Hello,
>>
>> does anyone know if the EX4550 has a real "per VLAN" mac table? I am asking
>> because we recently saw the router MAC changing from the switches uplink to
>> the customer's downlink in his vlan, most likely caused by a loop of some
>> kind. According to
>>
>>> show ethernet-switching table
>> The location of the mac changed on the customer's vlan only but we had
>> global effects that reached every customer not only on that switch but on
>> other switches in the same hierarchy and below as well and many, many
>> storm-control messages in the devices. So it looks like although the switch
>> RE shows a per-vlan mac table, it actually uses a kind of "least recently
>> learned" algorithm globally as long as the mac is identical.
> Hi,
>
> a specific MAC table entry is VLAN specific but a loop will wreck
> havoc on all customers on the switch, as the table itself is global
> and aging-out / learning happens globally. In case of a loop entries
> will age out and be relearned continously which will impact everybody.
>
> Regards
>
> Sebastian
>