Subject: RE: unified control plane

From: Jonathan Lang <[email-masked]>
Date: Wed, 15 May 2002 09:03:26 -0700

Zafar,
  Comments inline.

Thanks,
Jonathan

>-----Original Message-----
>From: Zafar Ali [mailto:[email-masked]]
>Sent: Wednesday, May 15, 2002 8:50 AM
>To: sushantm; [email-masked]
>Cc: [email-masked]
>Subject: Re: unified control plane
>Importance: High
>
>
>Dear sushantm, 
>
>Please see comments in-lined. 
>
>Thanks
>
>Regards... Zafar 
>
>>At 08:21 PM 5/15/2002 +0530, sushantm wrote:
>>
>>Hi,
>>
>>I have following queries.
>>
>>In an unified control plane(RSVP,LMP,OSPF)
>>-----------------------------------------
>>Does the LMP protocol exchange Label information with the ajacent node.?
>
>No, 
In the case where you are doing port or wavelength switching, the data link
Interface_Ids are used in the port/wavelength Label.

>>LMP in the correlation procedure  exchange along with TE links,the
datalink ID's.
>>Is Datalink Id's are the labels ?
>>
>No, A data link may contain multiple labels. LMP does not operate at the
label level.  
see comment above.

>>RSVP has IF_ID RSVP_HOP object which specifies the data channel in which
the LSP is will
>>be established .From Where does RSVP get this data interface information.
>>Does it get it from LMP.?
>>
>At the sender LSR, the selection of the component link in a TE Link (the
bundled case) is a >local decision or the information comes directly from
ERO (unbundled case). However, when 
>an LSR receives a Path message containing the IF_ID RSVP_HOP object with
the IF_INDEX TLV, 
>it uses an interface ID mapping functions (generated by using LMP or some
other means) and 
>the neighbor router ID to identify the unnumbered component link in
question.
Correct. The local/remote mapping can be learned using LMP.