CSR1
router ospf 1
 network 10.30.0.0 0.0.255.255 area 0


CSR2
router ospf 1
 network 10.30.0.0 0.0.255.255 area 0


XR9
router ospf 1
 area 0
  interface Loopback0
  !
  interface GigabitEthernet0/0/0/0


XR13
router ospf 1
 area 0
  interface Loopback0
  !
  interface GigabitEthernet0/0/0/0
  !
  interface GigabitEthernet0/0/0/1




RP/0/0/CPU0:XR13#show route ospf 
Fri May  8 22:51:44.974 UTC

O    10.30.0.1/32 [110/3] via 10.30.123.2, 00:01:07, GigabitEthernet0/0/0/0
O    10.30.0.2/32 [110/2] via 10.30.123.2, 00:01:07, GigabitEthernet0/0/0/0
O    10.30.0.9/32 [110/2] via 10.30.139.9, 00:00:34, GigabitEthernet0/0/0/1
O    10.30.12.0/24 [110/2] via 10.30.123.2, 00:01:07, GigabitEthernet0/0/0/0



​CSR2#sh ip route ospf
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area 
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route
       o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
       a - application route
       + - replicated route, % - next hop override, p - overrides from PfR

Gateway of last resort is not set

      10.0.0.0/8 is variably subnetted, 9 subnets, 2 masks
O        10.30.0.1/32 [110/2] via 10.30.12.1, 00:02:29, GigabitEthernet1
O        10.30.0.9/32 [110/3] via 10.30.123.13, 00:00:52, GigabitEthernet2
O        10.30.0.13/32 [110/2] via 10.30.123.13, 00:01:25, GigabitEthernet2
O        10.30.139.0/24 [110/2] via 10.30.123.13, 00:01:25, GigabitEthernet2