Re: [Idr] draft-walton-bgp-add-paths-06.txt as IDR WG document

Hi Danny,

 > and advertising the capability may well result in considerable
 > reductions in the ability to update pack, etc..

How would it ? Path_id is part of NLRI not any of the attached attributes.

Yes some applications which build on top of add-path may require new 
attributes but after all this is the price one needs to pay distribute 
more then best path around. And I think the numerous applications of the 
latter proves the price vs benefit much into the benefit zone.

Cheers,
R.

> 
> On Nov 25, 2008, at 8:58 AM, Pradosh Mohapatra (pmohapat) wrote:
>>
>> Right. It MUST preserve the path-id that it received in the path
>> structure since the id would be used for replacing any new
>> advertisement received for that path or removing the path upon
>> withdrawl.
> 
> Ahh, of course..
> 
>> This makes parsing extremely difficult. Reception of the capability
>> from a peer is the only indication that the UPDATE parsing needs
>> to retrieve the first four octets as path-id and the prefix
>> follows after that. How would you differentiate an UPDATE message
>> where prefixes are encoded with path-id vs. another where they
>> aren't?
>>
>> If a speaker is able to send only one path and has advertised
>> add-path capability, there are simpler ways to encode a (dummy)
>> path-id, like always encode 0 or 1 or whatever...
> 
> While I'm an advocate of this work, I'm just a little
> concerned about the fact that we're introducing more paths,
> and advertising the capability may well result in considerable
> reductions in the ability to update pack, etc..
> 
> Some explicit text around error handling would be useful here.
> 
> Of course, the call was to become a WG document, not WG LC,
> and so none of my queries should be considered gating.
> 
> -danny
> 
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr
> 

_______________________________________________
Idr mailing list
Idr@ietf.org
https://www.ietf.org/mailman/listinfo/idr