The MPLS-OPS Archive

[Sundeep Singh <singh0de@ee.iitb.ac.in>]

Thanx everyone for replying to my query... 
Especially eric thanx a lot, u told me what i really wanted to know.

Sundeep.


On Thu, 20 May 2004, Eric Osborne wrote:

> On Thu, 20 May 2004 10:15:29 +0530 (IST), Sundeep Singh  
> <singh0de@ee.iitb.ac.in> wrote:
> 
> > Hi,
> > I fail to understand the format of the "Path message" as specified in RFC
> > 3209. what does the different types of brackets signify?
> 
> That stuff is written in Backus-Naur Form (BNF):
> 
> http://cui.unige.ch/db-research/Enseignement/analyseinfo/AboutBNF.html
> 
> 
> > And say i wish to reserve 10kbps of bandwidth for a particular FEC, how  
> > is
> > this conveyed using a Path message?
> 
> This is signalled in the SENDER_TSPEC.  On a cisco box:
> 
> *Dec 23 17:57:17.029:  SENDER_TSPEC         type 2 length 36:
> *Dec 23 17:57:17.029:   version=0, length in words=7
> *Dec 23 17:57:17.029:   Token bucket fragment (service_id=1, length=6 words
> *Dec 23 17:57:17.029:     parameter id=127, flags=0, parameter length=5
> *Dec 23 17:57:17.029:     average rate=1250 bytes/sec, burst depth=1000  
> bytes
> *Dec 23 17:57:17.029:     peak rate   =1250 bytes/sec
> *Dec 23 17:57:17.029:     min unit=0 bytes, max pkt size=4294967295 bytes
> 
> average rate==peak rate==1250 Bytes/sec==10,000 bits/sec==10Kbps
> 
> Exactly where to put the BW isn't well specified, so it was a source of  
> confusion during the early days of TE, but seems to have all settled down  
> now.
> 
> > Also is there some good reference other than the RFC, where i can look  
> > for
> > a better understanding of RSVP-TE.
> 
> I can wholeheartedly recommend "Traffic Engineering with MPLS" by Osborne  
> & Simha, but I'm perhaps a little biased in that area. :)
> 
> 
> 
> eric
> 
> > Thanks,
> > Sundeep.
> 
> 

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