[c-nsp] EoMPLS from ME3750 to 7201 GigE sub-int

[Rado Vasilev]

http://www.cisco.com/en/US/docs/ios/mpls/configuration/guide/mp_any_transport_ps6350_TSD_Products_Configuration_Guide_Chapter.html#wp1187367



On 18 Jan 2009, at 02:31, Chris Phillips wrote:

> Rado,
>
> nyc1(config)#int te1/2.1254
> nyc1(config-subif)#mtu ?
>  <9216-9216>  MTU size in bytes
>
> nyc1(config-subif)#mtu 9216 ?
>  <cr>
>
> nyc1(config-subif)#mtu 9216
> % Sub-interface TenGigabitEthernet1/2.1254 does not support user  
> settable mtu
>
> Afaik, all sub-interfaces assume the MTU of the primary physical  
> port, and that this cannot be changed.
>
> Rado Vasilev wrote:
>> Justin,
>> You should be able to fix the MTU mismatch issue without changing  
>> the interface/sub-interface MTU.
>> conf t
>> interface xxx/x.10
>> xconnect ..
>>    mtu xxx
>> regards,
>> Rado
>> On 18 Jan 2009, at 01:41, Justin Shore wrote:
>>> Chris Phillips wrote:
>>>> The MTU definitely needs to be the same, in my experience.   
>>>> However, I am somewhat new to MPLS and am very much still in the  
>>>> learning process.  But, that would be the first thing that I  
>>>> would change.
>>>
>>> I'm in the same boat for L2VPNs.  I have somewhat better knowledge  
>>> of L3VPNs at this point.  We're just now really diving into L2VPNs.
>>>
>>> I did change the MTU and that fixed it.  That presents a design  
>>> issue for me which I detailed in a self-reply to the list.  I'm  
>>> now trying to figure out what best practice is for EoMPLS on sub- 
>>> ints when the sub-int involves customer and infrastructure VLANs.   
>>> The best answer may be to not mix them.  Thoughts?
>>>
>>> Thanks
>>> Justin
>>>
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>
> -- 
> Chris Phillips
> Senior IP Engineer & Peering Coordinator
> WBS Connect
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