loopbacks...

add the loopbacks, then the network statement
netw 10.1.x.0 0.0.0.255 area 0 in router config mode

this is incorrect... loopbacks should be configured as host routes... note below

r2(config-if)#do sh ip ospf int lo2
Loopback2 is up, line protocol is up
  Internet Address 10.1.2.1/24, Area 0
  Process ID 1, Router ID 10.1.2.1, Network Type LOOPBACK, Cost: 1
  Loopback interface is treated as a stub Host

r2(config-if)#ip ospf netw point-to-p
r2(config-if)#do sh ip ospf int lo2
Loopback2 is up, line protocol is up
  Internet Address 10.1.2.1/24, Area 0
  Process ID 1, Router ID 10.1.2.1, Network Type POINT_TO_POINT, Cost: 1
  Transmit Delay is 1 sec, State POINT_TO_POINT
  Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
    oob-resync timeout 40
  Supports Link-local Signaling (LLS)
  Cisco NSF helper support enabled
  IETF NSF helper support enabled
  Index 3/3, flood queue length 0
  Next 0x0(0)/0x0(0)
  Last flood scan length is 0, maximum is 0
  Last flood scan time is 0 msec, maximum is 0 msec
  Neighbor Count is 0, Adjacent neighbor count is 0
  Suppress hello for 0 neighbor(s)
r2(config-if)#

or simply configure them as host routes in the first place...

loopback love...

loopback  interfaces are an absolute good...

i'm sure i've said it before but loopbacks are a great way to troubleshoot your routing protocol without a lot of effort...

when you sh ip route, loopbacks are easily spotted, especially if you've assigned contextually significant addresses... ie, r1 gets lo0 1.1.1.1, r2 gets 2.2.2.2, etc.

but you knew this and that's why whenever you build a router or a mls you always include loopbacks as part of your configuration, and you never forget to add them as networks to your routing protocol...

correct...


r1#sh ip route
Codes: 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

Gateway of last resort is not set

     1.0.0.0/24 is subnetted, 1 subnets
C       1.1.1.0 is directly connected, Loopback0
     2.0.0.0/32 is subnetted, 1 subnets
O IA    2.2.2.2 [110/2] via 10.1.1.2, 00:08:13, FastEthernet0/0
     3.0.0.0/32 is subnetted, 1 subnets
O IA    3.3.3.3 [110/66] via 10.1.1.2, 00:08:13, FastEthernet0/0
     4.0.0.0/32 is subnetted, 1 subnets
O IA    4.4.4.4 [110/130] via 10.1.1.2, 00:08:13, FastEthernet0/0
     10.0.0.0/30 is subnetted, 3 subnets
O IA    10.1.1.8 [110/129] via 10.1.1.2, 00:08:13, FastEthernet0/0
C       10.1.1.0 is directly connected, FastEthernet0/0
O IA    10.1.1.4 [110/65] via 10.1.1.2, 00:08:13, FastEthernet0/0
r1#