How PDU(BPDU, VTP, CDP) L2 cross between PE PW?

Hi all!

I want to know how L2 PDU(BPDU, VTP, CDP) cross between PE PW(in AToM).

CE1 - PE1 = PW = PE2 - CE2

Hello

Whenever the traffic of the CE device between the of in mpls backbone of the complete pdu of THIS will be preservered and encapsulated in the new format according to transfer table as if it is etherne that external header will be ethernet MPLS lable will be there and that the complete PDU of the CE device. and layer two broadcast and multicast transmission must be done by the spine. in the case of STP BPDUS and CDP have all multicast in 01-80-c2-xx-xx-xx 01-80-c2-00-00-00 range address they eliminates to the spine at s appropriate PE that are discovered via the sender VE device.

This document will help you surely

http://www.Cisco.com/warp/public/121/mpls_packflow.html

HTH

Please rate if this helps.

Tags: Cisco Support

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