I have 3 routers -2610,1601,1603.
2610(s0/0.2, 192.168.100.1) and 1601(s1.1,192.168.100.2) connected by Frame Relay,
2610(e0/0,A.B.C.1) and 1603(e0,A.B.C.111) connected by Ethernet.
Because i have FR => NBMA environment -than (from O'Reilly book) - "In an NBMA environment, broadcasts or multicasts do not propogate over the FR."
And i should use
#neighbor A.B.C.D
to enable static OSPF neighbor relationship. But i did not do it. And it's work!Why?
( Addresses 141.108.*.* , 131.108.*.* i took from O'Reilly book).
All routers have information about networks:
2610#sh ip route ospf
141.108.0.0/32 is subnetted, 3 subnets
O 141.108.9.129 [110/782] via 192.168.100.2, 00:43:05, Serial0/0.2
O 141.108.9.1 [110/782] via 192.168.100.2, 00:43:05, Serial0/0.2
O 141.108.12.1 [110/782] via 192.168.100.2, 00:43:05, Serial0/0.2
131.108.0.0/16 is variably subnetted, 6 subnets, 3 masks
O 131.108.5.32/27 [110/1010] via A.B.C.111, 00:48:42, Ethernet0/0
O 131.108.6.1/32 [110/11] via A.B.C.111, 00:48:42, Ethernet0/0
O 131.108.6.2/32 [110/11] via A.B.C.111, 00:48:42, Ethernet0/0
192.168.17.0/32 is subnetted, 1 subnets
O 192.168.17.1 [110/782] via 192.168.100.2, 00:43:05, Serial0/0.2
192.168.16.0/32 is subnetted, 1 subnets
O 192.168.16.1 [110/11] via A.B.C.111, 00:48:42, Ethernet0/0
------------------------------
c1603#sh ip route ospf
141.108.0.0/32 is subnetted, 3 subnets
O IA 141.108.9.129 [110/792] via A.B.C.1, 00:50:15, Ethernet0
O IA 141.108.9.1 [110/792] via A.B.C.1, 00:50:15, Ethernet0
O IA 141.108.12.1 [110/792] via A.B.C.1, 00:50:15, Ethernet0
131.108.0.0/16 is variably subnetted, 6 subnets, 2 masks
O 131.108.4.129/32 [110/11] via A.B.C.1, 00:50:15, Ethernet0
O 131.108.4.1/32 [110/11] via A.B.C.1, 00:50:15, Ethernet0
O 131.108.5.1/32 [110/11] via A.B.C.1, 00:50:15, Ethernet0
192.168.17.0/32 is subnetted, 1 subnets
O IA 192.168.17.1 [110/792] via A.B.C.1, 00:44:35, Ethernet0
O IA 192.168.100.0/24 [110/791] via A.B.C.1, 00:50:15, Ethernet0
----------------------------------------
Cisco1601#sh ip route ospf
131.108.0.0/16 is variably subnetted, 6 subnets, 2 masks
O IA 131.108.4.129/32 [110/1563] via 192.168.100.1, 00:46:21, Serial1.1
O IA 131.108.5.32/27 [110/2572] via 192.168.100.1, 00:46:21, Serial1.1
O IA 131.108.6.1/32 [110/1573] via 192.168.100.1, 00:46:21, Serial1.1
O IA 131.108.4.1/32 [110/1563] via 192.168.100.1, 00:46:21, Serial1.1
O IA 131.108.6.2/32 [110/1573] via 192.168.100.1, 00:46:21, Serial1.1
O IA 131.108.5.1/32 [110/1563] via 192.168.100.1, 00:46:21, Serial1.1
192.168.16.0/32 is subnetted, 1 subnets
O IA 192.168.16.1 [110/1573] via 192.168.100.1, 00:46:21, Serial1.1
___________________________________________
Here configs:
---------------------------------2610-----------------------
!
interface Loopback0
ip address 131.108.4.1 255.255.255.128
!
interface Loopback1
ip address 131.108.4.129 255.255.255.128
!
interface Loopback2
ip address 131.108.5.1 255.255.255.224
!
interface Ethernet0/0
ip address A.B.C.1 255.255.255.0
!
interface Serial0/0
bandwidth 512
no ip address
encapsulation frame-relay
!
....
!
interface Serial0/0.2 point-to-point
bandwidth xxx
ip address 192.168.100.1 255.255.255.0
frame-relay interface-dlci xxx
!
..........
!
router ospf 1
log-adjacency-changes
area 2 virtual-link 141.108.12.1
network 131.108.4.0 0.0.0.127 area 1
network 131.108.4.128 0.0.0.127 area 1
network 131.108.5.0 0.0.0.31 area 1
network 192.168.100.0 0.0.0.255 area 2
network A.B.C.0 0.0.0.255 area 1
!
----------------------------------1603--------------------------------------
!
interface Loopback0
ip address 131.108.5.33 255.255.255.224
no ip directed-broadcast
ip ospf network point-to-point
ip ospf cost 1000
!
interface Loopback1
ip address 131.108.6.1 255.255.255.255
no ip directed-broadcast
!
interface Loopback2
ip address 131.108.6.2 255.255.255.255
no ip directed-broadcast
!
interface Loopback3
ip address 192.168.16.1 255.255.255.0
no ip directed-broadcast
!
interface Ethernet0
ip address A.B.C.111 255.255.255.0
.................
!
router ospf 2
network 131.108.5.32 0.0.0.31 area 1
network 131.108.6.1 0.0.0.0 area 1
network 131.108.6.2 0.0.0.0 area 1
network 192.168.16.0 0.0.0.255 area 1
network A.B.C.0 0.0.0.255 area 1
!
------------------------------------1601-------------------------------------
!
interface Loopback0
ip address 141.108.9.1 255.255.255.128
!
interface Loopback1
ip address 141.108.9.129 255.255.255.128
!
interface Loopback2
ip address 141.108.12.1 255.255.255.0
!
interface Loopback3
ip address 192.168.17.1 255.255.255.0
!
interface Ethernet0
ip address 192.168.10.1 255.255.255.0
!
.....
!
interface Serial1
bandwidth xxx
no ip address
encapsulation frame-relay
frame-relay lmi-type cisco
!
interface Serial1.1 point-to-point
bandwidth
ip address 192.168.100.2 255.255.255.0
frame-relay interface-dlci xxx
!
router ospf 3
log-adjacency-changes
area 2 virtual-link 131.108.5.1
network 141.108.9.0 0.0.0.127 area 0
network 141.108.9.128 0.0.0.127 area 0
network 141.108.12.0 0.0.0.255 area 0
network 192.168.17.0 0.0.0.255 area 0
network 192.168.100.0 0.0.0.255 area 2
!
----------------------------------------------------------------------------------
