[Idr] RE: Prefix-list ORF sequence number question

["Vivian Lu" <[e-mail]>]

Thanks for the clarification.

Vivian.

> -----Original Message-----
> From: Enke Chen (enkechen) [mailto:[e-mail]] 
> Sent: Wednesday, February 09, 2005 1:38 PM
> To: Lu, Vivian [BL60:SF21:EXCH]
> Cc: [e-mail]; [e-mail]; [e-mail]
> Subject: RE: Prefix-list ORF sequence number question
> 
> 
> Hi, Vivian:
> 
> Please see my comments inlined.
> 
> > -----Original Message-----
> > From: Vivian Lu [mailto:[e-mail]]
> > Sent: Wednesday, February 09, 2005 6:12 AM
> > To: Vivian Lu; '[e-mail]'; '[e-mail]'
> > Cc: '[e-mail]'
> > Subject: Prefix-list ORF sequence number question
> > 
> > Hi,
> > 
> > I have a question regarding prefix-list ORF draft,
> > draft-ietf-idr-bgp-prefix-orf-00.txt. 
> > 
> > The "sequence" field as specified in the draft is the following, 
> >         "The 'Sequence' field is a number that specifies the
> > relative ordering of the entry." 
> > 
> > What is the scope to which the statement is referring that
> > makes the ordering significant? 
> 
> The "Sequence" field is used in Sect 6. Address Prefix ORF 
> Matching when multiple ORF entries match a particular NLRI.
> 
> We can add some text to the definition in the next revision.
> 
> > 
> > Is the scope
> > 
> > 	*	per bgp peer session? 
> > 
> > 		-- That is, sequence number is continuously
> > incremented for each orf entry through out the peer session. 
> > 		-- Sequence number gets reset when the peer 
> > session is reset. 
> > 	*	per ORF message? 
> > 
> > 		-- That is, sequence number is continuously
> > incremented for each orf entry within an ORF message. 
> > 		-- Sequence number gets reset when a new ORF 
> > message is created. 
> > 	*	per ORF type block in the orf message ?
> > 
> > 		-- That is, sequence number is continuously
> > incremented for each orf entry within an ORF type block 
> > inside an ORF message.
> > 
> > 		-- Sequence number gets reset when a new ORF
> > type block is written. 
> > 
> > We are wondering which one is what you intended and the
> > industry may agree with. 
> 
> Per the base ORF spec., ORFs are exchanged on a per peer
> basis, and the life time of an ORF is the duration of the session.
> 
> The scope of the sequence number is within the prefix-ORF
> type exchanged over the session.  It is a local matter
> (on the sender) how the sequenece number is assigned for
> the intended semantics "relative ordering").
> 
> -- Enke
> 

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