[c-nsp] Bridging dot1q on a 7200

[Jeff Fitzwater]

Hello Skeeve,

Let me try to pull some teeth here.

 From the information you have given, it sounds like you have a 7200 
router in the middle of two switches that are each 400 meters apart  and 
therefor must have fiber connections.   You say the 2 switch ports that 
connect to the 7200 are dot1q ports, so I would guess that the 7200 
ports they connect to, are trunks. 

Q1.  What are the vlans on the ports from the switches, and do they 
carry a native vlan?
Q2.   Do you want to bridge the same vlan or different vlans from these 
two switches?
Q3.   Are you trying to route and bridge IP traffic from two different 
vlans? No can do. One or the other.
Q4.   Are the two vlans you are trying to bridge, native or tagged?
Q5. Are you running CDP or Spanning-tree on these vlans?


Let's go from here, maybe the additional info will help the list give 
you a better answer.


Sincerely;


Jeff Fitzwater
OIT Network Systems
Princeton University

Tom Storey wrote:
> Why bridge them on the router?
>
> If the two interfaces are connected to different switches, why not either:
>
> a) Run a cable between the two and trunk the VLAN accross if its the same VLAN ID; or
> b) Run a cable between the two, with each end in its respective VLAN
>
> But a little more detail about what you want to achieve might help us better advise of a solution.
>
>
>   
>> I am full of questions tonight - that's what happens when you are working on
>> a dozen things at once.
>>
>> I am looking to bridge two layer 2 dot1q interfaces coming in on 2 different
>> Ethernet interfaces on a 7200(g1/300/400)
>>
>> Is what I am looking at a BVI?
>>
>> Skeeve
>>
>> --
>> Skeeve Stevens, RHCE
>> skeeve at skeeve.org / www.skeeve.org
>> Cell +61 (0)414 753 383 / skype://skeeve
>>
>> eintellego - skeeve at eintellego.net - www.eintellego.net 
>> --
>> I'm a groove licked love child king of the verse 
>> Si vis pacem, para bellum
>>
>>
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