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Rfulton
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Posts: 99
Joined: Tue Aug 08, 2017 2:17 am

OSPF over GRE

Fri Apr 24, 2020 5:00 pm

Hello,

I have a GRE tunnel build with a pfsense box across a wan link, That is working great. When setting up OSPF between the two, I get a dynamic link as such.

1 D interface=GRE cost=10 priority=1 authentication=none
authentication-key="" authentication-key-id=1 network-type=point-to-point
instance-id=0 retransmit-interval=5s transmit-delay=1s hello-interval=10s
dead-interval=40s use-bfd=no

0 instance=default router-id=3.3.3.3 address=192.168.255.6 interface=GRE
priority=1 dr-address=0.0.0.0 backup-dr-address=0.0.0.0 state="Full"
state-changes=5 ls-retransmits=0 ls-requests=0 db-summaries=0 adjacency=4m6s

but I'm running into an issue where the OSPF routes aren't populating the main table.
OSPF ROUTES
2 10.10.10.1/32 intra-area 20
5 192.168.90.0/24 intra-area 11 192.168.255.2 Uplink To C.
6 192.168.100.0/24 intra-area 11 192.168.255.2 Uplink To C.
7 192.168.106.0/24 intra-area 20
8 192.168.107.0/24 intra-area 20
9 192.168.108.0/24 intra-area 20
10 192.168.150.0/24 intra-area 11 192.168.255.2 Uplink To C.
11 192.168.255.0/30 intra-area 10 0.0.0.0 Uplink To C.
12 192.168.255.4/30 intra-area 10 0.0.0.0 GRE

ROUTING TABLE

3 ADC 192.168.88.0/24 192.168.88.1 bridge 0
4 ADo 192.168.90.0/24 192.168.255.2 110
5 ADo 192.168.100.0/24 192.168.255.2 110
6 X S 192.168.106.0/24 192.168.255.6 1
7 X S 192.168.107.0/24 192.168.255.6 1
8 X S 192.168.108.0/24 192.168.255.6 1
9 ADo 192.168.150.0/24 192.168.255.2 110
10 ADC 192.168.255.0/30 192.168.255.1 Uplink To Cisco 0
11 ADC 192.168.255.4/30 192.168.255.5 Chance 0


Someone on reddit seemed to have the same issue as me with a point to point OSPF link.

https://www.reddit.com/r/mikrotik/comme ... ng_routes/
 
Rfulton
Frequent Visitor
Frequent Visitor
Topic Author
Posts: 99
Joined: Tue Aug 08, 2017 2:17 am

Re: OSPF over GRE

Fri Apr 24, 2020 5:23 pm

Here's what my LSA with the Pfsense over GRE looks like.
instance=default area=backbone type=router id=3.3.3.3 originator=3.3.3.3
sequence-number=0x8000003D age=289 checksum=0x6872 options="E"
body=
flags=EXTERNAL
link-type=Point-To-Point id=1.1.1.1 data=0.0.0.16 metric=10
link-type=Stub id=192.168.107.0 data=255.255.255.0 metric=10
link-type=Stub id=192.168.106.0 data=255.255.255.0 metric=10
link-type=Stub id=10.10.10.1 data=255.255.255.255 metric=10
link-type=Stub id=192.168.108.0 data=255.255.255.0 metric=10

Here's my cisco LSA which is local.

instance=default area=backbone type=router id=2.2.2.2 originator=2.2.2.2
sequence-number=0x800002D7 age=1803 checksum=0xB0E4 options="E|DC"
body=
flags=
link-type=Stub id=2.2.2.2 data=255.255.255.255 metric=1
link-type=Stub id=192.168.150.0 data=255.255.255.0 metric=1
link-type=Stub id=192.168.100.0 data=255.255.255.0 metric=1
link-type=Stub id=192.168.90.0 data=255.255.255.0 metric=1
link-type=Transit id=192.168.255.2 data=192.168.255.2 metric=1

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