The MPLS-OPS Archive

[ShraddhaH <ShraddhaH@huawei.com>]

Hi all,

 

     I have a question  regarding the processing of label mapping message.

 

Here are the steps copied from the RFC 3036 appendix

for  "Receive Label Mapping Message".

 

LMp.9   Does LSR have a previously received label mapping for FEC
              from MsgSource for the LSP in question?  (See Note 6.)
              If not, goto LMp.11.

 

      LMp.10  Does the label previously received from MsgSource match
              Label (i.e., the label received in the message)?
              (See Note 3.)
              If not, goto LMp.32.  (See Note 4.)

 

In these two steps  It is being checked if the Label mapping message  has been previously received from 

msgsource and if so it is being checked if the present and the previous labels match    only then the LMP

is processed otherwise the Label release message is sent back.

Now the question is if  the LSR is non-merging then it may receive multiple LMPs for same FEC and the

labels may not (of course ,will not)  match. I think it should accept the label in this case ,but the label is

being released.How is the non-merging case taken care of?

 

thanks in advance

 

Rgds

Shraddha