Re: Re: [OSPF] draft-ietf-ospf-ospfv3-graceful-restart-03
"Vivek Dubey" <vivek_ospf@rediffmail.com> Mon, 08 May 2006 05:14 UTC
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From: Vivek Dubey <vivek_ospf@rediffmail.com>
To: Acee Lindem <acee@cisco.com>
Subject: Re: Re: [OSPF] draft-ietf-ospf-ospfv3-graceful-restart-03
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Hi Acee, It takes care of my concern. Thanks Vivek On Fri, 05 May 2006 Acee Lindem wrote : >Hi Vivek, > >Ok - if I explain the problem in section 2.3 as I did below (only more >elegantly :^), will that eliminate your concern? Since, heretofore, this is are >only WG Last Call comment, I'm compelled to address it. > >Thanks, >Acee > >Vivek Dubey wrote: > >>Acee, >>I agree/understand the, reasons to keep Interface-Id same across restarts. >>But the current phrasing seems to imply that reason for preserving Interface-Id is to keep "the pre-restart and post-restart LSAs same". >> >>The phrasing used in explanation below is more clear. >> >>Thanks >>Vivek >> >> >>On Wed, 03 May 2006 Acee Lindem wrote : >> >>>Vivek, >>> >>>Vivek Dubey wrote: >>> >>> >>>>Section 3.2: >>>>If this were not the case, the pre-restart and post-restart LSAs wouldn't be the same and the restart would be disruptive. >>>> >>>><vivek> If "post-restart" here means "after router undergoing restart has exited/exiting graceful-restart", it is supposed to reoriginate LSAs as per Section 2.3 RFC 3623. Description in Section 2.3 RFC 3623 does not mandate the contents to be same. Than why do pre-restart and post-restart LSAs need to be same? >>>> >>>>Preservation of Interface IDs have more to do with figuring out whether restarting router has re-established all its adjacencies. >>>> >>>> >>>Since the interface ID is in the link data for OSPFv3 router LSAs, a change in interface ID >>>could result in a mismatch between neighbor adjacency state for the restarting router and >>>the pre-restart router LSA. Synchronizing the change across the restarting router and >>>the helping routers would be very difficult (if not next to impossible) and would probably >>>result in unreachability or premature graceful restart termination. It is much better for the >>>restarting router to preserve this state across restarts. >>> >>>Hope this helps, >>>Acee >>> >>> >>>>-Vivek >>>> >>>> >>>> >>>> >>>>------------------------------------------------------------------------ >>>> >>>>_______________________________________________ >>>>OSPF mailing list >>>>OSPF@ietf.org >>>>https://www1.ietf.org/mailman/listinfo/ospf >>>> >>>> >> >>
_______________________________________________ OSPF mailing list OSPF@ietf.org https://www1.ietf.org/mailman/listinfo/ospf
- [OSPF] draft-ietf-ospf-ospfv3-graceful-restart-03 Vivek Dubey
- Re: [OSPF] draft-ietf-ospf-ospfv3-graceful-restar… Acee Lindem
- Re: Re: [OSPF] draft-ietf-ospf-ospfv3-graceful-re… Vivek Dubey
- Re: [OSPF] draft-ietf-ospf-ospfv3-graceful-restar… Acee Lindem
- Re: Re: [OSPF] draft-ietf-ospf-ospfv3-graceful-re… Vivek Dubey