Re: [mpls-linux-general] generation of the label release message

[James R. L. <jl...@mi...>]

On Wed, Sep 19, 2001 at 12:19:59PM +0530, Abhijit Gadgil wrote:
> amit goyal wrote :
> 
> >I have a doubt regarding generation of Label release
> >message in response of withdraw message ,
> >Its like this:
> >If upstream receives wildcard FEC in the withdraw
> >message then will it send individual release message
> >for each of the FEC's for which it has received labels
> >from the down stream LSR or it will send a single
> >release message with the same FEC and label TLV
> >combination as of the withdraw message.
> 
> Here sending a release message with wild card FEC may be a bit problematic
> for the end which sent the withdraw message. (Note that this is not
> incorrect if one looks at the specifications. But it won't be guaranteed
> that this is interoperable.) The better idea would be to send FEC vector
> corrosponding to the released FECs.

First, if the downstream sent a wild card FEC in the withdraw it most
likely will support a wild card FEC in the release.

Second, exploding a single withdraw into possibly thousands of releases is
not practical.  The reason the wild card FEC was created was to keep
traffic being generated at session tear down time to a minimum.

Jim

> 
> --a
> 
> 
> 
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-- 
James R. Leu