Re: [Isis-wg] draft-wei-isis-tlv-03 (Purge Originator Id)

On 22/04/2010 07:41, Les Ginsberg (ginsberg) wrote:
> A couple of other comments that come to mind:
>
> We need to define what an implementation SHOULD do when it receives a
> purged LSP with the additional TLVs i.e. store it (including the body)
> and flood it unchanged.
>    
Yes. I think that is what would be expected from the existing spec, but 
it does no harm to clarify it. I wonder if any existing implementations 
would take it upon themselves to remove the body from a purge? I hope not.
> If the same purged LSP is received from two different originators, the
> choice of which "copy" to flood is a local matter.
>    

Hmmm. Would it not be the case that the first one received was always 
the one flooded, since any later ones received would be regarded as 
duplicates?
>     Les
>
>    
>> -----Original Message-----
>> From: isis-wg-bounces@ietf.org [mailto:isis-wg-bounces@ietf.org] On
>> Behalf Of Les Ginsberg (ginsberg)
>> Sent: Wednesday, April 21, 2010 11:25 PM
>> To: Tony Li; lizhenqiang@chinamobile.com; Jie Dong;
>> bruno.decraene@orange-ftgroup.co; isis-wg@ietf.org;
>> weifang@chinamobile.com
>> Subject: Re: [Isis-wg] draft-wei-isis-tlv-03 (Purge Originator Id)
>>
>>
>>
>>      
>>> -----Original Message-----
>>> From: isis-wg-bounces@ietf.org [mailto:isis-wg-bounces@ietf.org] On
>>> Behalf Of Tony Li
>>> Sent: Wednesday, April 21, 2010 10:55 PM
>>> To: lizhenqiang@chinamobile.com; Jie Dong; bruno.decraene@orange-
>>> ftgroup.co; isis-wg@ietf.org; weifang@chinamobile.com
>>> Subject: Re: [Isis-wg] draft-wei-isis-tlv-03 (Purge Originator Id)
>>>
>>>
>>>
>>>
>>>        
>>>> I renamed the draft as draft-ietf-isis-purge-tlv-00.txt and
>>>>          
>> submitted
>>      
>>>> it to IETF. Its status is Initial Version Approval Requested.
>>>>          
>>>
>>> As long as that's stuck in the queue, there's not much point in
>>> submitting a
>>> -01 verison.  So here's the document as an attachment.
>>>        
>> But hopefully we can comment on 01 anyway?? :-)
>>
>> ****************
>>
>> I don't see the need for Section 3. It was interesting discussion
>> material while we were debating the merits of making this a WG
>> document,
>> but I think it has drawbacks when it is included in what is intended
>>      
> to
>    
>> become a standards document.
>>
>> The first three points suggest (no doubt unintentionally) that this
>> document may in some way be redefining/clarifying the base spec in
>> regards to when it is permissible to purge. I don't think we want to
>> even remotely suggest that. If you want to know when it is OK to
>>      
> purge,
>    
>> look at the base spec.
>>
>> In the second set of three points, only the first (which documents the
>> lamentable purge on checksum error experience) has value. The last two
>> are anecdotal and could be translated as "there are some weird bugs
>>      
> out
>    
>> there". Interesting - but unnecessary. The first point could be
>> mentioned in the introduction as part of the justification for the
>> protocol extensions - but I think even that is unnecessary.
>>
>> ********************
>> In Section 5 I would like to see language which says "hostname TLV
>> SHOULD only be used in addition to the system ID TLV". As every IS
>>      
> MUST
>    
>> have a unique systemID but hostnames are optional I would prefer that
>> if
>> an implementation chooses to include the extra info in the purge that
>> the system ID ALWAYS be there. (This is unenforceable of course)
>>
>> *******************
>>
>> I think there needs to be language which makes clear that the absence
>> or
>> presence of this additional information has no impact on the
>>      
> acceptance
>    
>> of a purged LSP as valid i.e. no changes to the operation of the
>>      
> Update
>    
>> process are introduced by this draft.
>>
>> Thanx.
>>
>>     Les
>>
>>
>>      
>>> Tony
>>>        
>> _______________________________________________
>> Isis-wg mailing list
>> Isis-wg@ietf.org
>> https://www.ietf.org/mailman/listinfo/isis-wg
>>      
> _______________________________________________
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> Isis-wg@ietf.org
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>
>    

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