Let’s set up a basic OSPF adjacency between JunOS and IOS. I’ve got the following simple topology:
The good thing here is that the configs shown will show the difference between JunOS and IOS as the actual configuration goal is the same for both.
The Cisco config is as follows:
Router>conf t #int fa0 #ip address 192.168.1.2 255.255.255.0 #int lo100 #ip address 172.16.10.1 255.255.255.0 #router ospf 1 #network 192.168.1.0 0.0.0.255 area 0 #network 172.16.10.0 0.0.0.255 area 0 #exit
Now onto JunOS:
[email protected]>configure # set interfaces em1 unit 0 family inet address 192.168.1.2/24 # set interfaces lo0 unit 100 family inet address 172.16.20.1/24 # edit protocols ospf area 0 # set interface 192.168.1.1 # set interface 172.16.20.1
Let’s see what we see on the Cisco:
Router#sh ip ospf neighbor
Neighbor ID Pri State Dead Time Address Interface
172.16.20.1 128 FULL/BDR 00:00:34 192.168.1.1 FastEthernet0
Router#sh ip route
172.16.0.0/16 is variably subnetted, 3 subnets, 2 masks
O 172.16.20.0/24 [110/1] via 192.168.1.1, 00:00:25, FastEthernet0
O 172.16.20.1/32 [110/1] via 192.168.1.1, 00:00:25, FastEthernet0
C 172.16.10.0/24 is directly connected, Loopback100
C 192.168.1.0/24 is directly connected, FastEthernet0
What about the Olive?
[email protected]> show ospf neighbor Address Interface State ID Pri Dead 192.168.1.2 em1.0 FULL 172.16.10.1 1 36 [email protected]>show route 172.16.10.1/32 *[OSPF/10] 00:09:05, metric 2 > to 192.168.1.2 via em1.0
And yes, both routers can ping both loopbacks :)