Re: VC type 4 and VC type 5

Pending confusion is : ( please look at scenario below )

CE1 e0/0.201 ---------------- e0/0.201 PE --------------- CLOUD
--------------- PE e1/0.140 ----------------e1/0.140 CE2

PE1
====
int e0/0.201
encap dot1q 201
xconnect 10.1.1.1 33 pw-class TEST
!

PE2
=====
int e1/0.140
encap dot1q 140
xconnect 20.1.1.1 33 pw-class TEST
!

We are connecting CE1(201 vlan) to CE2 (140 vlan )

Q 1 : When vlan tagged pkt of 201 reaches PE1 .. Is this dot1q label
preserved / striped in above config .. There are 2 labels added i
know ( VC label and IGP/MPLS label ) .. But is original label from CE
preserved ?

Q 2 : How is it changed / re-written at PE2 ? Kindly explain

I think things will start making sense if these 2 questions are answered .

Thanks in advance
Gaurav Madan

On Fri, Mar 4, 2011 at 2:19 AM, ccie19804_at_gmail.com <ccie19804_at_gmail.com> wrote:
> Look in Ciscopress Layer 2 VPN Architectures, it has good detailed explanation on these topics.
>
> Swap
> #19804
>
>
> Sent from my iPhone
> Plaese ingore seplling mistkaes
> ___________________________
>
> On 3 Mar 2011, at 16:53, GAURAV MADAN <gauravmadan1177_at_gmail.com> wrote:
>
>> Friends ,
>>
>> Is there a good write-up on this ? Any blog / white paper etc ..
>>
>> I am finding it hard to understand by reading how vlan tags / VC ids
>> are travelling across .. EVC concept added to it are making things
>> even more confusing ..
>> Please point to good doc if you know of one ?
>>
>> Thanks
>> Gaurav Madan
>>
>>
>> Blogs and organic groups at http://www.ccie.net
>>
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Received on Fri Mar 04 2011 - 23:28:15 ART