EdgeRouter Lite Simple OSPF Guide

Here’s a really simple OSPF setup on two Ubiquiti Edge Router Lites.

Two ERLs hooked together via eth0.

ERL20 <-> ERL10
192.168.20.1 192.168.1.2 <-> 192.168.1.1 192.168.10.1

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on ERL20 get into configure and run the following:

# give this router an id. 
set protocols ospf parameters router-id 192.168.20.1

# 0.0.0.0 is backbone. Add in networks to advertise. 
set protocols ospf area 0.0.0.0 network 192.168.1.0/24
set protocols ospf area 0.0.0.0 network 192.168.20.0/24

# enable ospf on eth0 interface (going to ERL10) 
set interfaces ethernet eth0 ip ospf

on ERL10 get into configure and run the following.

# give this router an id. 
set protocols ospf parameters router-id 192.168.10.1

# 0.0.0.0 is backbone. Add in networks to advertise. 
set protocols ospf area 0.0.0.0 network 192.168.1.0/24
set protocols ospf area 0.0.0.0 network 192.168.10.0/24

# enable ospf on eth0 interface (going to ERL20) 
set interfaces ethernet eth0 ip ospf

run ‘commit’ on both them, (‘save’ if you want to) and ‘exit’ to prompt.

Now watch ospf work it’s magic.

[email protected]:~$ show ip ospf neighbor

 Neighbor ID Pri State Dead Time Address Interface RXmtL RqstL DBsmL
192.168.20.1 1 2-Way/DROther 34.213s 192.168.1.2 eth0:192.168.1.1 0 0 0

[email protected]:~$ show ip ospf neighbor

 Neighbor ID Pri State Dead Time Address Interface RXmtL RqstL DBsmL
192.168.10.1 1 2-Way/DROther 36.422s 192.168.1.1 eth0:192.168.1.2 0 0 0

[email protected]:~$ show ip ospf neighbor

 Neighbor ID Pri State Dead Time Address Interface RXmtL RqstL DBsmL
192.168.20.1 1 ExStart/DR 30.837s 192.168.1.2 eth0:192.168.1.1 0 0 0

[email protected]:~$ show ip ospf neighbor

 Neighbor ID Pri State Dead Time Address Interface RXmtL RqstL DBsmL
192.168.10.1 1 Full/Backup 39.764s 192.168.1.1 eth0:192.168.1.2 2 0 0

[email protected]:~$ show ip ospf neighbor

 Neighbor ID Pri State Dead Time Address Interface RXmtL RqstL DBsmL
192.168.20.1 1 Full/DR 39.674s 192.168.1.2 eth0:192.168.1.1 1 0 0

Now you should have routes

[email protected]:~$ show ip route
Codes: K - kernel route, C - connected, S - static, R - RIP, O - OSPF,
 I - ISIS, B - BGP, > - selected route, * - FIB route

C>* 127.0.0.0/8 is directly connected, lo
O 192.168.1.0/24 [110/10] is directly connected, eth0, 00:11:40
C>* 192.168.1.0/24 is directly connected, eth0
O 192.168.10.0/24 [110/10] is directly connected, eth1, 00:11:39
C>* 192.168.10.0/24 is directly connected, eth1
O>* 192.168.20.0/24 [110/20] via 192.168.1.2, eth0, 00:10:58

[email protected]:~$ show ip route
Codes: K - kernel route, C - connected, S - static, R - RIP, O - OSPF,
 I - ISIS, B - BGP, > - selected route, * - FIB route

C>* 127.0.0.0/8 is directly connected, lo
O 192.168.1.0/24 [110/10] is directly connected, eth0, 00:11:34
C>* 192.168.1.0/24 is directly connected, eth0
O>* 192.168.10.0/24 [110/20] via 192.168.1.1, eth0, 00:10:44
O 192.168.20.0/24 [110/10] is directly connected, eth1, 00:11:33
C>* 192.168.20.0/24 is directly connected, eth1

 

2 thoughts on “EdgeRouter Lite Simple OSPF Guide”

  1. Hi,

     

    I am trying to connect to edge router pros together in a similar manner.  We want to use one as a firewall and the main gateway to the other router who’s job it will be to connect to our switches and route network traffic.  I have followed your instructions exactly, but cant seem to get it to work.  any ideas?

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