Taqdir, One example is where the primary RP crashes and the backup RP takes over. Several documents on cisco.com explain graceful restart and non-stop forwarding for the various protocols that support it. Take a look at the High Availability guide:
http://www.cisco.com/en/US/docs/ios/ha/configuration/guide/12_2sr/ha_12_2sr_book.html On Sat, Aug 15, 2009 at 2:47 PM, Taqdir Singh <[email protected]> wrote: > Thanks adrian , but what kind of go down it keeps the packet forwarding ? > > Sincerely, > Taqdir Singh > 91-9911709496 > > > Do today what others won't, So that you can live tomorrow what others can't > > > ------------------------------ > *From:* Adrian Brayton <[email protected]> > *To:* Taqdir Singh <[email protected]> > *Cc:* [email protected] > *Sent:* Saturday, 15 August, 2009 8:31:40 PM > *Subject:* Re: [OSL | CCIE_RS] Gracefull Restart > > It doesn't really go down as you would think if you powered it off... It > continues to forward packets using hardware and what's currently in the RIB. > > HTHs > > > On Aug 15, 2009, at 3:34 PM, Taqdir Singh wrote: > > Books say in gracefull restart , if there are two neighbors.. the router > which is going down will send a gracefull msg to its peer and that peer will > not alter its routing table for specific period of time and will continue > forwarding packets to router which is going down. and when the router which > went down comes up will take all the routes from its peer router. > > I have confusion , if the router is going down how will it forward packets > coming from the peer ? > > Could any1 clear the concept of gracefull restart , with a simple > example of two routers , I would be very thankfull ? > > Sincerely, > Taqdir Singh > 91-9911709496 > > Do today what others won't, So that you can live tomorrow what others can't > > > ------------------------------ > Yahoo! recommends that you upgrade to the new and safer Internet Explorer > 8<http://in.rd.yahoo.com/tagline_ie8_1/*http://downloads.yahoo.com/in/internetexplorer/> > ._______________________________________________ > For more information regarding industry leading CCIE Lab training, please > visit www.ipexpert.com > > > > ------------------------------ > Yahoo! recommends that you upgrade to the new and safer Internet Explorer > 8<http://in.rd.yahoo.com/tagline_ie8_1/*http://downloads.yahoo.com/in/internetexplorer/> > . > > _______________________________________________ > For more information regarding industry leading CCIE Lab training, please > visit www.ipexpert.com > > -- Bryan Bartik CCIE #23707 (R&S), CCNP Sr. Support Engineer - IPexpert, Inc. URL: http://www.IPexpert.com
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