MikroTik

Hello!
I try to configure dynamic routing with MikroTik.
Now I have working GRE tunnel between opnsense and routerboard.
After start ospf instanses I have corrects routes on opensense. But on MikroTik I have routes without gateway address and interface.


/routing ospf> neighbor print
0 instance=default router-id=172.26.0.1 address=100.100.100.41
interface=vorona-gate priority=1 dr-address=0.0.0.0
backup-dr-address=0.0.0.0 state="Full" state-changes=50 ls-retransmits=0
ls-requests=0 db-summaries=0 adjacency=23m31s

Here we can see, that address 100.100.100.41 (opensense)
But in recieved routes I have:



Why I haven't gateway address here?

Also, I haven't this route in routing table for this reason.

configs:
Tik:
/routing ospf area
set [ find default=yes ] disabled=yes
add area-id=172.16.117.0 name=area1
/routing ospf instance
set [ find default=yes ] router-id=172.16.117.1
/routing ospf interface
add passive=yes
add interface=vorona-gate network-type=point-to-point
/routing ospf network
add area=area1 network=100.100.100.40/30
add area=area1 network=172.16.117.0/24

Opensense:
frr version 7.4
frr defaults datacenter
hostname gate.vorona.su
log syslog
!
interface gre1
ip ospf area 172.16.117.0
!
interface vtnet1
ip ospf area 0.0.0.0
!
router ospf
ospf router-id 172.26.0.1
passive-interface vtnet1
!
ip prefix-list test seq 10 permit 172.26.0.0/28
!
line vty
!
end

Gre interfaces has addresses from 100.100.100.40/30 network

What I'm doing wrong?

Looks like your default backbone area on the Router OS is being disabled:
/routing ospf area
set [ find default=yes ] disabled=yes
add area-id=172.16.117.0 name=area1

Could your try to enable it?

Looks like your default backbone area on the Router OS is being disabled:
/routing ospf area
set [ find default=yes ] disabled=yes
add area-id=172.16.117.0 name=area1

Could your try to enable it?

It looks like hes using area-id=172.16.117.0 on the gre interface between the opensense and mikrotik, and the opensense is acting as an ABR because it also has backbone listed.
Im not familiar with the opensense, but is its default ospf interfaces point to point? I dont see a line in the config saying type, but in the mikrotik you are specifying point to point.

Are your MTUs correct on interfaces? That can cause ospf oddities too.

Hello!
I'm not using BB zone here, for this reason I disabled it. But I try to use BB zone. Result same. I see route, but there is no gateway here.

MTU at both sides of tunnel same. In case, when MTU different MT say it in logs.

Is there more ideas?

Mikrotik does not log l2mtu misconfiguration when type is set to point to point.

Is point to point default on the other router? I did not see you setting type on it.

Same problem with PFSense (FRR / OSPF) - I see routes in OSPF, but without gateway and interface.
PFsense can ping hosts behind mikrotik, but mikrotik can ping hosts only if select which interface to ping through (gre to pfsense).
OSPF between two PFSense routers work great. Mikrotik - won't work :(
What's wrong?