Hi So this happened last night for no reason I can see, the simrtr re installed its own loop back address And then that got flooded out to the network ? Aug 10 21:50:13 simrtr1 route,ospf,debug simrtr1: Originate Router LSA Aug 10 21:50:13 simrtr1 route,ospf,debug simrtr1: area=VDC Aug 10 21:50:13 simrtr1 route,ospf,debug simrtr1: Installing an LSA Aug 10 21:50:13 simrtr1 route,ospf,debug simrtr1: lsa=Router LSA id=10.32.255.11 originator=10.32.255.11 seqnum=0x80000466 Aug 10 21:50:13 simrtr1 route,ospf,debug simrtr1: old=Router LSA id=10.32.255.11 originator=10.32.255.11 seqnum=0x80000465 Aug 10 21:50:13 simrtr1 route,ospf,debug simrtr1: Flooding an LSA Aug 10 21:50:13 simrtr1 route,ospf,debug simrtr1: lsa=Router LSA id=10.32.255.11 originator=10.32.255.11 seqnum=0x80000466 Aug 10 21:50:13 simrtr1 route,ospf,debug simrtr1: area=VDC Aug 10 21:50:13 simrtr1 route,ospf,debug simrtr1: Deleting an LSA Aug 10 21:50:13 simrtr1 route,ospf,debug simrtr1: lsa=Router LSA id=10.32.255.11 originator=10.32.255.11 seqnum=0x80000465 Aug 10 21:50:14 simrtr1 route,ospf,debug simrtr1: Originate SummaryPrefix LSA Aug 10 21:50:14 simrtr1 route,ospf,debug simrtr1: area=backbone Aug 10 21:50:14 simrtr1 route,ospf,debug simrtr1: prefix=10.32.41.0/24 Aug 10 21:50:14 simrtr1 route,ospf,debug simrtr1: metric=10 Aug 10 21:50:14 simrtr1 route,ospf,debug simrtr1: Installing an LSA Aug 10 21:50:14 simrtr1 route,ospf,debug simrtr1: lsa=Summary Network LSA id=10.32.41.0 originator=10.32.255.11 seqnum=0x80000379 Aug 10 21:50:14 simrtr1 route,ospf,debug simrtr1: old=Summary Network LSA id=10.32.41.0 originator=10.32.255.11 seqnum=0x80000378 Aug 10 21:50:14 simrtr1 route,ospf,debug simrtr1: Flooding an LSA Aug 10 21:50:14 simrtr1 route,ospf,debug simrtr1: lsa=Summary Network LSA id=10.32.41.0 originator=10.32.255.11 seqnum=0x80000379 Aug 10 21:50:14 simrtr1 route,ospf,debug simrtr1: area=backbone Aug 10 21:50:14 simrtr1 route,ospf,debug simrtr1: Adding to neighbor's retransmit list Aug 10 21:50:14 simrtr1 route,ospf,debug simrtr1: lsa=Summary Network LSA id=10.32.41.0 originator=10.32.255.11 seqnum=0x80000379 Aug 10 21:50:14 simrtr1 route,ospf,debug simrtr1: neighbor=10.34.255.3 Aug 10 21:50:14 simrtr1 route,ospf,debug simrtr1: number of retransmits=1 Aug 10 21:50:14 simrtr1 route,ospf,debug simrtr1: Adding to neighbor's retransmit list Aug 10 21:50:14 simrtr1 route,ospf,debug simrtr1: lsa=Summary Network LSA id=10.32.41.0 originator=10.32.255.11 seqnum=0x80000379 Aug 10 21:50:14 simrtr1 route,ospf,debug simrtr1: neighbor=10.34.255.2 Aug 10 21:50:14 simrtr1 route,ospf,debug simrtr1: number of retransmits=1 Aug 10 21:50:14 simrtr1 route,ospf,debug simrtr1: Deleting an LSA Aug 10 21:50:14 simrtr1 route,ospf,debug simrtr1: lsa=Summary Network LSA id=10.32.41.0 originator=10.32.255.11 seqnum=0x80000378 Aug 10 21:50:14 simrtr1 route,ospf,debug simrtr1: SEND: Link State Update 10.31.19.130 -> 224.0.0.6 on MAN Aug 10 21:50:14 gsrtr1 route,ospf,debug gsrtr1: RECV: Link State Update <- 10.31.19.130 on MAN (10.31.19.3) Aug 10 21:50:14 gsrtr1 route,ospf,debug gsrtr1: LSA Update received: Installing and flooding it Aug 10 21:50:14 gsrtr1 route,ospf,debug gsrtr1: header=Summary Network LSA id=10.32.41.0 originator=10.32.255.11 seqnum=0x80000379 Aug 10 21:50:14 gsrtr1 route,ospf,debug gsrtr1: Installing an LSA A -----Original Message----- From: Public [mailto:public-bounces@talk.mikrotik.com.au] On Behalf Of Alex Samad - Yieldbroker Sent: Tuesday, 11 August 2015 6:49 AM To: MikroTik Australia Public List <public@talk.mikrotik.com.au> Subject: Re: [MT-AU Public] OSPF issues Checked all my RouterOs and asa's. correct password ! -----Original Message----- From: Public [mailto:public-bounces@talk.mikrotik.com.au] On Behalf Of Alex Samad - Yieldbroker Sent: Tuesday, 11 August 2015 6:40 AM To: MikroTik Australia Public List <public@talk.mikrotik.com.au> Subject: Re: [MT-AU Public] OSPF issues Hi Its been working great for ..... 8 months + Pretty sure the MD5 signatures are right. I will double check though. 29.2 I'm general 1-2 months behind the latest A -----Original Message----- From: Public [mailto:public-bounces@talk.mikrotik.com.au] On Behalf Of Paul Julian Sent: Monday, 10 August 2015 9:32 PM To: 'MikroTik Australia Public List' <public@talk.mikrotik.com.au> Subject: Re: [MT-AU Public] OSPF issues Alex, the first thing I would be doing is fixing the authentication failures, Mikrotiks do behave strangely sometimes with OSPF I have found and occasionally need a kick in the butt, but in general it works well. Are you running recent versions of RouterOS everywhere and are they all the same version ? Regards Paul -----Original Message----- From: Public [mailto:public-bounces@talk.mikrotik.com.au] On Behalf Of Alex Samad - Yieldbroker Sent: Monday, 10 August 2015 8:01 PM To: public@talk.mikrotik.com.au Subject: [MT-AU Public] OSPF issues Hi Need some help debugging some OSPF issue. I have some flapping on the data center network Bascially I have a backbone with 1 asa5520 4 CCR1036 4 RouterOS VM's I am using OSPF to get the routing done. After the issue in the morning I turn on ospf,debug,!raw to my syslog server. To see if I can find out what the issue was This seems to be unusual behaviour (I think), doesn't normally happen, seem to be re inserting known routes but with a different seqnum ? Aug 10 17:47:23 gsrtr1 route,ospf,debug gsrtr1: LSA Update received: Installing and flooding it Aug 10 17:47:23 gsrtr1 route,ospf,debug gsrtr1: header=AS-External LSA id=206.190.96.0 originator=10.43.255.2 seqnum=0x80001814 Aug 10 17:47:23 gsrtr1 route,ospf,debug gsrtr1: Installing an LSA Aug 10 17:47:23 gsrtr1 route,ospf,debug gsrtr1: lsa=AS-External LSA id=206.190.96.0 originator=10.43.255.2 seqnum=0x80001814 Aug 10 17:47:23 gsrtr1 route,ospf,debug gsrtr1: old=AS-External LSA id=206.190.96.0 originator=10.43.255.2 seqnum=0x80001813 Aug 10 17:47:23 gsrtr1 route,ospf,debug gsrtr1: Adding to neighbor's retransmit list Aug 10 17:47:23 gsrtr1 route,ospf,debug gsrtr1: lsa=AS-External LSA id=206.190.96.0 originator=10.43.255.2 seqnum=0x80001814 Aug 10 17:47:23 gsrtr1 route,ospf,debug gsrtr1: neighbor=10.32.255.13 Aug 10 17:47:23 gsrtr1 route,ospf,debug gsrtr1: number of retransmits=1 .... Aug 10 17:47:24 gsrtr1 route,ospf,info gsrtr1: Invalid sequence number Aug 10 17:47:24 gsrtr1 route,ospf,info gsrtr1: mine=587629 Aug 10 17:47:24 gsrtr1 route,ospf,info gsrtr1: received=587628 Aug 10 17:47:24 gsrtr1 route,ospf,info gsrtr1: Discarding packet: MD5 authentication failed Aug 10 17:47:24 gsrtr1 route,ospf,info gsrtr1: source=10.31.19.4 Aug 10 17:47:24 gsrtr1 route,ospf,info gsrtr1: Invalid sequence number Aug 10 17:47:24 gsrtr1 route,ospf,info gsrtr1: mine=581231 Aug 10 17:47:24 gsrtr1 route,ospf,info gsrtr1: received=581230 Aug 10 17:47:24 gsrtr1 route,ospf,info gsrtr1: Discarding packet: MD5 authentication failed Aug 10 17:47:24 gsrtr1 route,ospf,info gsrtr1: source=10.31.17.3 I'm not sure how they get out of sequence. The network is not being overly used ... If somebody can tell me if this is normal behaviour ... "install and flooding". Or its normal for when seq numbers get out.. What might be things that might through a seq out ? Also the network is very static.. so ... I have actually gone in and add static routes with metric 250 for 90% of the routes.. A _______________________________________________ Public mailing list Public@talk.mikrotik.com.au http://talk.mikrotik.com.au/mailman/listinfo/public_talk.mikrotik.com.au _______________________________________________ Public mailing list Public@talk.mikrotik.com.au http://talk.mikrotik.com.au/mailman/listinfo/public_talk.mikrotik.com.au _______________________________________________ Public mailing list Public@talk.mikrotik.com.au http://talk.mikrotik.com.au/mailman/listinfo/public_talk.mikrotik.com.au _______________________________________________ Public mailing list Public@talk.mikrotik.com.au http://talk.mikrotik.com.au/mailman/listinfo/public_talk.mikrotik.com.au