Debian
tun0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
inet addr:10.8.1.18 P-t-P:10.8.1.18 Mask:255.255.255.0
UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1500 Metric:1
RX packets:159 errors:0 dropped:0 overruns:0 frame:0
TX packets:160 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:10128 (9.8 KiB) TX bytes:10820 (10.5 KiB)
/ospfd.conf
!
interface eth0
!
interface eth1
!
interface lo
!
interface tun0
!
router ospf
ospf router-id 10.8.1.18
network 10.8.1.0/24 area 0.0.0.0
network 192.168.18.0/24 area 0.0.0.0
!
line vty
!
show ip ospf neighbor
Neighbor ID Pri State Dead Time Address Interface RXmtL RqstL DBsmL
10.8.1.1 1 Init/DROther 31.533s 10.8.1.1 tun0:10.8.1.18 0 0 0
Mikrotik
/log print
23:21:42 route,ospf,info Discarding Hello packet: mismatch in network mask
23:21:42 route,ospf,info mine=255.255.255.255
23:21:42 route,ospf,info remote=0.0.0.0
23:21:42 route,ospf,info source=10.8.1.18
[xxx@mkrt /ppp secret> print
Flags: X - disabled
NAME SERVICE CALLER-ID PASSWORD PROFILE REMOTE-ADDRESS
0 ppp-1 ovpn xxxxxxx default 10.8.1.2
1 ppp-2 ovpn xxxxxxx default 10.8.1.4
2 ppp-3 ovpn xxxxxxx default 10.8.1.18
ppp-1 ppp-2 - mikrotiks work good
[xxx@mkrt] /routing ospf neighbor> print
0 instance=default router-id=10.8.1.2 address=10.8.1.2 interface= priority=1 dr-address=10.8.1.2 backup-dr-address=10.8.1.1 state="Full"
state-changes=6 ls-retransmits=0 ls-requests=0 db-summaries=0 adjacency=2h15m58s
1 instance=default router-id=10.8.1.4 address=10.8.1.4 interface= priority=1 dr-address=10.8.1.4 backup-dr-address=10.8.1.1 state="Full"
state-changes=6 ls-retransmits=0 ls-requests=0 db-summaries=0 adjacency=17h35m39s