0.0.0.0/0 permits only default route because it matches 0.0.0.0 with /0 sm .It does not match all routes because 192.168.1.0/24 has /24 mask . Thats why 0.0.0.0/0 le 32 matches all routes 192.168.1.0/24 is in the range 0 - 32 sm
2012/4/4 JM NGOK <[email protected]> > That's my concerns. I think this prefix-list is useless since it allows > the default-route (which includes any route) . > > Marko, > > Do you think this prefix-list is accurate for filtering ? > > Thanks > > Jean-Marie NGOK > Senior Network Engineer > > > > ________________________________ > From: Wilson Tuma <[email protected]> > To: JM NGOK <[email protected]>; "[email protected]" < > [email protected]> > Sent: Wednesday, April 4, 2012 1:22 AM > Subject: Re: [OSL | CCIE_RS] Prefix-list doubt > > > Hi all, > > Prefix List have always been tricky for me. But from my understanding. > > ip prefix-list ROUTES seq 10 permit 0.0.0.0/0 : Will permit only a > default route > > ip prefix-list ROUTES seq 999 deny 0.0.0.0/0 le 32 : Will deny anything. > > Combined it would mean permit default route and deny anything else. > Which is as good as permitting only the default route Since everything > else is denied by the implied deny all at the end of the prefix-list. > > So the final thing should be. > > ip prefix-list ROUTES seq 10 permit 0.0.0.0/0 > > > HTH > > > Thanks. > > Wilson F. Tuma > ==================================== > CCNP, CCNA, MCSE, MCSA > > Box 1784 Douala > Cell : +237 77 753 753 > Email : [email protected] > ==================================== > > > ________________________________ > From: JM NGOK <[email protected]> > To: "[email protected]" <[email protected]> > Sent: Tuesday, April 3, 2012 8:09 PM > Subject: [OSL | CCIE_RS] Prefix-list doubt > > Hi all, > > Please excuse my foolishness but I want to understand which subnets are > allowed under this prefix-list: > > > ip prefix-list ROUTES description INBOUND-ROUTES > ip prefix-list ROUTES seq 10 permit 0.0.0.0/0 > ip prefix-list ROUTES seq 999 deny 0.0.0.0/0 le 32 > > Again excuse me if this is not a CCIE level question. I just have some > doubts. > > Thanks > > Jean-Marie NGOK > Senior Network Engineer > 347 - 559 - 1172 > _______________________________________________ > For more information regarding industry leading CCIE Lab training, please > visit www.ipexpert.com > > Are you a CCNP or CCIE and looking for a job? Check out > www.PlatinumPlacement.com > > http://onlinestudylist.com/mailman/listinfo/ccie_rs > _______________________________________________ > For more information regarding industry leading CCIE Lab training, please > visit www.ipexpert.com > > Are you a CCNP or CCIE and looking for a job? Check out > www.PlatinumPlacement.com > > http://onlinestudylist.com/mailman/listinfo/ccie_rs > _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com http://onlinestudylist.com/mailman/listinfo/ccie_rs
