Hi All,
I have some doubts on PWE3 using LDP. It would be helpful if someone could clarify them. I might clearly miss few things, please bear with me.
1. Will there be a scenario to use the same PWid at both the end points? Or is it up to the administrator to decide what to use (assign same PWid at both the ends or assign different end point identifiers using the Generalized PWid FEC element)?
2. Is the AGI field in the Generalized PWid FEC element used to identify the PW. In that case, can we assume it is similar to the PWid field of the PWid FEC element.
3. Is the Group ID field of the PWid FEC element and the value in the Grouping ID TLV of the Generalized PWid FEC element similar? If not how different are they?
4. RFC 4447 Section 3, Page 6, Para 4
"It is REQUIRED that the same PW ID and PW type be assigned for a given circuit in both directions. The group ID MUST NOT be required to match in both directions."
Could some one explain the above statement? It seems to contradict the use of Generalized PWid FEC element. And how will the PW be mapped to a VPLS instance if the group ID doesn't match in both the directions?
Thanks in advance.
Regards,
Sriram