We've seen similar issues. Primarily when the 1072's routing table is over one full set of BGP routes. I've also seen issues where it will invalidate all BGP learned routes and show the peer as unreachable even though the peer is still active. Bouncing the peer resolves it, but if the router isn't rebooted the issues continue and get more sporadic as time goes on. Our debugging lead us to believe it's a memory leak issue (bug).
We've also seen several similar issues related to aggregates as well. Sometimes the 1072 will drop OSPF routes and sometimes they're still installed in the routing table but the aggregate function fails to see them and complete the function. We've reported several instances to support and you should do that same and include support files. Lance Laughter VCP4, CCIP, MCTS President LR Communications, Inc. 307.352.9997 307.367.4766 www.LRComputerServices.com "We cannot solve our problems with the same thinking we used when we created them." -Albert Einstein "Any society that would give up a little liberty to gain a little security will deserve neither and lose both." - Benjamin Franklin "My reading of history convinces me that most bad government results from too much government." - Thomas Jefferson -----Original Message----- > From: "Scott via Mikrotik-users" <mikrotik-users@wispa.org> > To: "Mikrotik Users" <mikrotik-users@wispa.org> > Date: 01/15/18 02:08 PM > Subject: Re: [Mikrotik Users] CCR 1072 BGP trivia for your Friday Night > > I have seen MikroTik fail to announce a connected route after changing > the netmask. It withdraws the old route, but never announces the new > one. I have to disable the IP on the MikroTik then re-enable it. I > could imagine it having a similar issue after some other change to the > route's metadata, but haven't observed it happening. > > Could something have changed to connected routes on the router(s) which > is(are) originating the problem /30s? > > On 2018/1/15 08:31, Steve Barnes via Mikrotik-users wrote: > > We are seeing very similar issues with ospf through our brocade. It is > > kind of like every so often a route goes stale and the brocade ignores it. > > I don’t have to kill upstream, Just change something in the /29 OSPF path > > and everything wakes up. > > > > Have a Brocade Core and 3- 1072 distribution routers connected to Brocade > > onto different network segments. One Dist router has no issue getting to > > all sections but another will not be able to ping one or a few /29 or /30 > > even though all devices have the same number of routes. Quick change of a > > ospf route or flushing the Brocade OSPF records on the Dist router port > > clears the issue. > > > > Steve Barnes > > Wireless Ops Manager > > NLBC.com > > > > -----Original Message----- > > From: mikrotik-users-boun...@wispa.org > > [mailto:mikrotik-users-boun...@wispa.org] On Behalf Of Dennis Burgess via > > Mikrotik-users > > Sent: Saturday, January 13, 2018 9:49 AM > > To: mike.l...@gmail.com; Mikrotik Users <mikrotik-users@wispa.org> > > Subject: Re: [Mikrotik Users] CCR 1072 BGP trivia for your Friday Night > > > > Sounds like an internal routing issue on the 1032 to me. And/or something > > up with your firewall. I would have to take a look. > > > > Dennis Burgess > > www.linktechs.net – 314-735-0270 x103 – dmburg...@linktechs.net > > > > -----Original Message----- > > From: mikrotik-users-boun...@wispa.org > > [mailto:mikrotik-users-boun...@wispa.org] On Behalf Of mike.lyon--- via > > Mikrotik-users > > Sent: Friday, January 12, 2018 7:18 PM > > To: christ...@cybernet1.com > > Cc: Mikrotik Users <mikrotik-users@wispa.org> > > Subject: Re: [Mikrotik Users] CCR 1072 BGP trivia for your Friday Night > > > > No, i am only advertising the two /22s to my upstreams. Verified that they > > are only recieving the two /22s. > > > > I should also mention that the CCR 1072 connects to a CCR 1036 and the > > various /30s and /29s hang off the 1036. There is a 10.x /30 between the > > two routers. The 1036 has a default route pointing to the 1072. The 1072 > > has two staric routes routing the two /22s to the 1036. > > > > It would appear the route is getting dropped at the 1072. > > > > Joe Bob Random /30 will report that he is unable to browse the internet at > > one moment, traceroute stops at the 1072. Drop one of the two BGP upstreams > > (doesnt matter which one) and Joe Bob Random /30 begins to work again. > > > > Thanks, > > Mike > > > >> On Jan 12, 2018, at 17:08, <christ...@cybernet1.com> > >> <christ...@cybernet1.com> wrote: > >> > >> Are you actually advertising /29's and /30's to your providers? > >> > >> > >> Also, what exactly do you mean by dropping /30's? Like the packets are > >> being dropped to those ip's, or the /30's are being discarded, the routes > >> are disappearing? > >> > >> -----Original Message----- > >> From: mikrotik-users-boun...@wispa.org > >> [mailto:mikrotik-users-boun...@wispa.org] On Behalf Of mike.lyon--- via > >> Mikrotik-users > >> Sent: Friday, January 12, 2018 5:54 PM > >> To: Mikrotik Users <mikrotik-users@wispa.org> > >> Subject: [Mikrotik Users] CCR 1072 BGP trivia for your Friday Night > >> > >> Howdy! > >> > >> I have an interesting issue that i can’t seem to figure out... > >> > >> Quick overview: > >> > >> -1x CCR 1072 running 6.40.1 > >> -2 upstream providers, taking full tables from both to the 1072. > >> -2x public /22s behind the 1072 and am advertising both /22s to my > >> upstreams. > >> -The /22s are chopped up into various /29s and /30s. > >> > >> Out of the blue, the 1072 will randomly drop various /30s (havent seen any > >> dropped /29s) out of those 2 /22s that im advertising upstream. > >> > >> If i drop one of either of my upstreams , the problem goes away and > >> everything is swell. > >> > >> Any ideas or thoughts on what may be causing this? > >> > >> Thank You, > >> Mike > > > -- > Scott Lambert KC5MLE Unix SysAdmin > lamb...@lambertfam.org > > > _______________________________________________ > Mikrotik-users mailing list > Mikrotik-users@wispa.org > http://lists.wispa.org/mailman/listinfo/mikrotik-users _______________________________________________ Mikrotik-users mailing list Mikrotik-users@wispa.org http://lists.wispa.org/mailman/listinfo/mikrotik-users
