The MPLS WG Archive

["Amarnath Honnavalli Anantharamaiah" <amarnath.honnavalli@wipro.com>]

Hi vijay,

Given a combination of upstream LSR (Ru) and downstream LSR (Rd) - Distribution procedure is Downstream's distribution procedure & Request procedure is upstreams. Hence in the combination below,
<PushUnConditional, RequestWhenNeeded, RequestNoRetry,ReleaseOnChange, *> Distribution procedure represents donwstream ' distribution procedure and Request Procedure is Upstream.

Am I wrong ?

The above conclution is made from the mpls architechture draft (or RFC)
5.1.1 Downstream LSR: Distribution Procedure
5.1.2 Upstream LSR: Request Procedure

Regards
Amar

Vijayanand Chandrasekar wrote:

 Amar,This information is needed for configuring the LSRs' on what schemes WE support. For example PushConditional means Unsolicited Ordered control is used by us when we distribute labels as a downstream.It is not what is used ny our downstream.Your question is why you are not allowed to use -  (PushUnCond)UnsolicitedIndependent with (RWN)Conservative .Unsolicited Independent and Conservative are not used in combination,You can look at the mail archives for this.The question should not be not whether ur downstream is ordered or independent? Vijay

-----Original Message-----
From: Amarnath Honnavalli Anantharamaiah [mailto:amarnath.honnavalli@wipro.com]
Sent: Thursday, February 22, 2001 5:39 PM
To: Vijayanand Chandrasekar
Cc: Bob Thomas
Subject: Re: LSP control mode of peer...
 

Vijay,

[1] No, basically question was,  From the list of valid schemes supported  for  merge capable LSR, we don't find this combination.
<PushUnConditional, RequestWhenNeeded, RequestNoRetry,ReleaseOnChange, *>
 however we can find the following combination
<PushConditional, RequestWhenNeeded, RequestNoRetry,ReleaseOnChange, *>

Now, how do we know if downstream is PushConditional or PushUnconditional ???

[2] If this is not needed to know, Why is this combination given in the list ?

Regards
Amar

Vijayanand Chandrasekar wrote:

Vinay,I don't think you need to know whether your downstream is Ordered or Independent. You need to just know if it is Ondemand or Unsolicited. Regards,Vijay

-----Original Message-----
From: owner-mpls@UU.NET [mailto:owner-mpls@UU.NET]On Behalf Of Vinay Vernekar
Sent: Thursday, February 22, 2001 1:41 PM
To: 'mpls@uu.net'
Subject: LSP control mode of peer...

Hello,I have a query which came up when implementing the LDP as in rfc3036 - "LDP Specification", keeping in mind the MPLS architecture as given be rfc3031.As discussed in rfc3031 - 5.2.1. Schemes for LSRs that Support Label Merging -If Ru and Rd are label distribution peers, and both support labelmerging one of the supported scheme is - 3. <PushConditional, RequestWhenNeeded, RequestNoRetry,ReleaseOnChange, *>This implies that the label retention mode of the upstream can be conservative given that the downstream is operating in Unsolicited label distribution mode and its LSP control mode is Ordered. But how can the LSP control mode of the peer be determined? This is not available in any of the LDP messages/TLVs. Thanks & RegardsVinay~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Yesterday is history. Tomorrow is mystery.
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Vinay H. Vernekar
Sr. Software Engineer - Global R&D Solutions
Wipro Technologies
No.26, Hosur Main Road, Bommanahalli,
Bangalore-560 068, India.
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