I would have to re-read the RFC to see if something like this is mentioned, but it's definitely borderline :-). The good thing is that it cannot possibly create the loop, because NOTHING is sent to the other router on the segment, therefore making that router entirely oblivious to anything connected to the router not advertising the LSAs.
-- Marko Milivojevic - CCIE #18427 Senior Technical Instructor - IPexpert FREE CCIE training: http://bit.ly/vLecture Mailto: [email protected] Telephone: +1.810.326.1444 Web: http://www.ipexpert.com/ On Sun, Nov 21, 2010 at 22:24, Artem Nedoshepa <[email protected]> wrote: > database-filter all out <----Does it "break" the RFC for OSPF or it's > somewhere there? > > On Fri, Nov 19, 2010 at 7:39 AM, Bojan Zivancevic > <[email protected]> wrote: >> >> I will just reply to myself... :) >> >> >> >> Could it be that ip ospf flood-reduction command is used to filter LSA >> flooding that occurs after 30 minutes? Every router after 30 mins floods all >> LSAs that he advertised originally etc. etc. >> >> >> >> database-filter all out just stops every LSA update. No LSAs coming out, >> period. OK. Nice for hub/spoke networks, especially with slow links ... >> >> >> >> But what about that first one? When should we use it? >> >> >> >> Best Regards, >> >> >> >> Bojan Zivancevic >> >> Network Engineer >> >> >> >> From: Bojan Zivancevic [mailto:[email protected]] >> Sent: Friday, November 19, 2010 11:42 >> To: [email protected] >> Subject: [OSL | CCIE_RS] OSPF: flood-reduction and/or database-filter all >> out? >> >> >> >> Can somebody explain the exact difference between these two? Maybe I >> should rephrase that... I found adequate info on the database-filter >> command, and can understand its purpose. But I cannot find anything detalied >> enough for the flood-reduction command. >> >> >> >> Doc-CD is not useful for these commands, in my opinion. Not much info >> there. >> >> >> >> Best Regards, >> >> >> >> Bojan Zivancevic >> >> Network Engineer >> >> _______________________________________________ >> For more information regarding industry leading CCIE Lab training, please >> visit www.ipexpert.com >> > > > _______________________________________________ > For more information regarding industry leading CCIE Lab training, please > visit www.ipexpert.com > > _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com
