>Right. >But all I wanted to confirm is that the book implies that >ALL traffic is suspended until the OSPF network is converged? > >Elmer
Not necessarily. In general, routing will continue even with a route failure longer than will bridging. OSPF has to send a new route to the RIB, which then has to make its way to the FIB. Incidentally, there are drafts underway in the IETF to continue "optimistic" forwarding even after a complete shutdown and restart of routing protocols. > >-----Original Message----- >From: Peter Van Oene [mailto:[EMAIL PROTECTED]] >Sent: Tuesday, October 02, 2001 10:09 AM >To: [EMAIL PROTECTED] >Subject: Re: Doyle on OSPF DR failure-election [7:21659] > >When the DR fails, the BDR takes over as soon as it ages out the its dead >timer for the DR. The BDR already has adjacencies with all other routers on >the segment and has been keeping tabs on the DR such that it can take over >rather gracefully. A BDR election is then subsequently held to backfill the >BDR position. No adjacencies should be torn down during this process, >though new ones may be created between the set of non DR/BDR routers and the >new BDR. > >Hope that helps. > >Pete > > >*********** REPLY SEPARATOR *********** > >On 10/2/2001 at 8:10 AM Elmer Deloso wrote: > >>Hello again. >>On page 419 of Doyle's book, it explains that "if the DR fails, a new >>DR must be elected,new adjacencies must be established, and all >>Routers on the network must synchronize....while all this is happening, >>The network is UNAVAILABLE for transit packets." >>My question is: >>What about EXISTING sessions between DROTHERs, will these get >>Interrupted when the DR fails? Or is this in reference to packets using the >>Area where the failed DR is as a TRANSIT area? >>Wouldn't individual routers still maintain a CACHED copy of which way >>To route remaining packets (e.g. to complete an FTP download?) >> >>Elmer Deloso Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=21696&t=21659 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
