Issues with OSPF

RouterOS Forwarding Protocols
1

Hello,

I’ve two CCR1036 using the RouterOS 6.32.3 with last firmware. They are connected by optic fiber and running OSPF.

Sometimes I’ve problems on the OSPF and it stops to work for a short period.

The RouterOS logs these informations:

01:07:52 route,ospf,info Database Description packet has init bit set in middle of an exchange
01:07:52 route,ospf,info OSPFv2 neighbor 10.99.99.12: state change from Full to 2-Way
01:08:43 route,ospf,info OSPFv2 neighbor 10.99.99.12: state change from Full to Init
01:08:49 route,ospf,info Database Description packet has init bit set in middle of an exchange
01:08:49 route,ospf,info OSPFv2 neighbor 10.99.99.12: state change from Exchange to 2-Way
01:09:29 route,ospf,info OSPFv2 neighbor 10.99.99.12: state change from Exchange to 2-Way
01:09:47 route,ospf,info OSPFv2 neighbor 10.99.99.12: state change from Exchange to 2-Way
01:09:59 route,ospf,info OSPFv2 neighbor 10.99.99.12: state change from ExStart to Down
01:10:00 route,ospf,info OSPFv2 neighbor 10.99.99.12: state change from ExStart to Down
01:10:20 route,ospf,info Discarding packet: no neighbor with this source address
01:10:20 route,ospf,info RouterId=10.99.99.12
01:10:20 route,ospf,info source=10.100.101.26
01:10:20 route,ospf,info Discarding packet: no neighbor with this source address
01:10:20 route,ospf,info RouterId=10.99.99.12
01:10:20 route,ospf,info source=10.100.100.26
01:11:02 route,ospf,info OSPFv2 neighbor 10.99.99.12: state change from Exchange to 2-Way
01:11:07 route,ospf,info OSPFv2 neighbor 10.99.99.12: state change from Exchange to 2-Way
01:11:44 route,ospf,info OSPFv2 neighbor 10.99.99.12: state change from Exchange to 2-Way
01:11:48 route,ospf,info OSPFv2 neighbor 10.99.99.12: state change from Exchange to 2-Way
01:11:57 route,ospf,info Database Description packet has init bit set in middle of an exchange
01:11:57 route,ospf,info OSPFv2 neighbor 10.99.99.12: state change from Exchange to 2-Way
01:11:57 route,ospf,info Database Description packet has init bit set in middle of an exchange
01:11:57 route,ospf,info OSPFv2 neighbor 10.99.99.12: state change from Exchange to 2-Way
01:12:54 route,ospf,info OSPFv2 neighbor 10.99.99.12: state change from Exchange to 2-Way
01:12:54 route,ospf,info OSPFv2 neighbor 10.99.99.12: state change from Exchange to 2-Way

OSPF configuration on Router 1:

/ip address> print
Flags: X - disabled, I - invalid, D - dynamic 
#   ADDRESS            NETWORK         INTERFACE                                                                                                                                     
0   10.100.101.25/30    10.100.101.0    ether11  
1   10.100.100.25/30    10.100.100.0    sfp3  
2   10.99.99.2/32       10.99.99.2      lobridge 
 
/routing ospf instance> print
Flags: X - disabled, * - default 
 0  * name="default" router-id=10.99.99.2 distribute-default=never redistribute-connected=no redistribute-static=no redistribute-rip=no redistribute-bgp=no redistribute-other-ospf=no 
      metric-default=1 metric-connected=20 metric-static=20 metric-rip=20 metric-bgp=auto metric-other-ospf=auto in-filter=ospf-in out-filter=ospf-out 

/routing ospf interface> print
Flags: X - disabled, I - inactive, D - dynamic, P - passive 
 #    INTERFACE                                                                                       COST PRIORITY NETWORK-TYPE   AUTHENTICATION AUTHENTICATION-KEY
 0    sfp3                                                                                                   10        1 point-to-point none
 1    ether11                                                                                                30        1 point-to-point none

/routing ospf network> print
Flags: X - disabled, I - invalid 
 #   NETWORK            AREA                                                                                                                                                          
 0   10.100.100.24/30   backbone
 1   10.100.101.24/30   backbone
 2   10.99.99.2/32         backbone

OSPF configuration on Router 2:

/ip address> print
Flags: X - disabled, I - invalid, D - dynamic 
#   ADDRESS            NETWORK         INTERFACE                                                                                                                                     
0   10.100.101.26/30    10.100.101.0    sfp1
1   10.100.100.26/30    10.100.100.0    sfp2 
2   10.99.99.12/32       10.99.99.12   lobridge 

/routing ospf instance> print
Flags: X - disabled, * - default 
 0  * name="default" router-id=10.99.99.12 distribute-default=never redistribute-connected=no redistribute-static=no redistribute-rip=no redistribute-bgp=no redistribute-other-ospf=no 
      metric-default=1 metric-connected=20 metric-static=20 metric-rip=20 metric-bgp=auto metric-other-ospf=auto in-filter=ospf-in out-filter=ospf-out 

/routing ospf interface> print
Flags: X - disabled, I - inactive, D - dynamic, P - passive 
 #    INTERFACE                                                                                       COST PRIORITY NETWORK-TYPE   AUTHENTICATION AUTHENTICATION-KEY
 0    sfp1                                                                                                     30        1 point-to-point none
 1    sfp2                                                                                                     10        1 point-to-point none

/routing ospf network> print
Flags: X - disabled, I - invalid 
 #   NETWORK            AREA                                                                                                                                                          
 0   10.100.100.24/30	backbone
 1   10.100.101.24/30	backbone
 2   10.99.99.12/32		backbone

Can someone help me?

2

I would try setting the Network-Type =Broadcast on all interfaces rather than Point to Point.

With Network-Type=Point to Point no router is elected as designated router under OSPF. This is good on a wireless segment of an OSPF network but perhaps not so good in your situation ?

3

If it’s a production network, I would be running the latest stable bugfix which is 6.30.4 and see if the issue persists.

4

Thanks for the reply!

Yes the router are in production and I’m running 6.32.3 that is the last stable version of RouterOS, do you think that the 6.30.4 is a best choice for OSPF?

5

Latest stable is a bit misleading as the latest bugfix version is generally considered the most stable all around code for production networks unless the latest stable current release contains features that are needed.

we have recommended 6.30.4 bugfix to all of our clients and have multiple networks running OSPF/BGP/MPLS on that version with no issues.

Here is an article we did on the new MikroTik code development

http://www.stubarea51.net/2015/08/04/mikrotik-unveils-new-routeros-development-cycle/