How are the two green underlined routers connected to each other? Have you actually determined that you don't have a flapping route?
Casey On Mon, Feb 6, 2012 at 10:43 AM, Nick W <lists-wi...@atomsplash.com> wrote: > Just double-checked and all routers are NTP sync'd. By time-out values you > mean OSPF retransmit-interval, transmit-delay, hello-interval, and > router-dead-interval? If so, all active interfaces are set the same. All > routers/neighbors show State:Full even during the route flapping. > > > > On Mon, Feb 6, 2012 at 3:15 AM, Scott Reed <sr...@nwwnet.net> wrote: > >> All routers must have the same time-out values. >> Clocks must all me synced. >> >> >> On 2/6/2012 4:17 AM, Nick W wrote: >> >>> I've got a very strange OSPF route flapping issue that has me stumped for >>> about the last 2 weeks. I have two internet connections feeding from >>> opposite sides of my network, 14 routers in total, looks similar to this >>> drawing: >>> http://i40.tinypic.com/ogwbwg.**png<http://i40.tinypic.com/ogwbwg.png> >>> >>> Both internet routers are set to always distribute default route as type >>> 1. >>> Internet routers are receiving full BGP route tables. The problem I'm >>> seeing is that the first router on the left with the green line will load >>> routes from the second (on right), totaling ~202 routes, then after 8 >>> seconds or so, it removes all of those routes and only has the original 76 >>> routes from the routers to the left of it. Rinse and repeat every ~10 >>> seconds. The router on the top-right sits equal distance to both internet >>> routers, so I have a higher cost on the interface flowing below. >>> Everything >>> is NBMA, and all routers are 5.7 or 5.12. >>> >>> I've set up debug, ospf logging on the left-green router, and the only >>> thing that stands out is this: >>> >>> "Feb/06/2012 00:41:28 route,ospf,debug Ignoring LSA Update: failed >>> MinArrival test" >>> >>> I found a forum post which looks similar, but unfortunately his solution >>> won't work for me, since I want two default routes. ( >>> http://forum.mikrotik.com/**viewtopic.php?f=14&t=36092<http://forum.mikrotik.com/viewtopic.php?f=14&t=36092> >>> ) >>> >>> Any thoughts? I can provide a detailed log if someone wants to look at it. >>> >>> Nick >>> -------------- next part -------------- >>> An HTML attachment was scrubbed... >>> URL:<http://www.butchevans.**com/pipermail/mikrotik/** >>> attachments/20120206/80b80a02/**attachment.html<http://www.butchevans.com/pipermail/mikrotik/attachments/20120206/80b80a02/attachment.html> >>> > >>> ______________________________**_________________ >>> Mikrotik mailing list >>> Mikrotik@mail.butchevans.com >>> http://www.butchevans.com/**mailman/listinfo/mikrotik<http://www.butchevans.com/mailman/listinfo/mikrotik> >>> >>> Visit http://blog.butchevans.com/ for tutorials related to Mikrotik >>> RouterOS >>> >>> >>> ----- >>> No virus found in this message. >>> Checked by AVG - www.avg.com >>> Version: 2012.0.1913 / Virus Database: 2112/4791 - Release Date: 02/05/12 >>> >>> >>> >> -- >> Scott Reed >> Owner >> NewWays Networking, LLC >> Wireless Networking >> Network Design, Installation and Administration >> >> >> >> Mikrotik Advanced Certified >> >> www.nwwnet.net >> (765) 855-1060 >> (765) 439-4253 >> (855) 231-6239 >> >> >> ______________________________**_________________ >> Mikrotik mailing list >> Mikrotik@mail.butchevans.com >> http://www.butchevans.com/**mailman/listinfo/mikrotik<http://www.butchevans.com/mailman/listinfo/mikrotik> >> >> Visit http://blog.butchevans.com/ for tutorials related to Mikrotik >> RouterOS >> >> > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > <http://www.butchevans.com/pipermail/mikrotik/attachments/20120206/fc20d1e0/attachment.html> > _______________________________________________ > Mikrotik mailing list > Mikrotik@mail.butchevans.com > http://www.butchevans.com/mailman/listinfo/mikrotik > > Visit http://blog.butchevans.com/ for tutorials related to Mikrotik RouterOS _______________________________________________ Mikrotik mailing list Mikrotik@mail.butchevans.com http://www.butchevans.com/mailman/listinfo/mikrotik Visit http://blog.butchevans.com/ for tutorials related to Mikrotik RouterOS
