Now, let's make example for OSPF Non Broadcast. By default, using Frame Relay is Non broadcast
R1#
int s0/0
encap frame-relay
ip addr 123.123.123.1 255.255.255.0
frame-relay map ip 123.123.123.2 102 broadcast
frame-relay map ip 123.123.123.3 103 broadcast
int lo0
ip addr 1.1.1.1 255.255.255.255
R2#
int s0/0
encap frame-relay
ip addr 123.123.123.2 255.255.255.0
frame-relay map ip 123.123.123.1 201 broadcast
frame-relay map ip 123.123.123.3 201
int lo0
ip addr 2.2.2.2 255.255.255.255
R3#
int s0/0
encap frame-relay
ip addr 123.123.123.3 255.255.255.0
frame-relay map ip 123.123.123.1 301 broadcast
frame-relay map ip 123.123.123.2 301
int lo0
ip addr 3.3.3.3 255.255.255.255
Check frame mapping. It should be active
R1#sh fram map
Serial0/0 (up): ip 123.123.123.2 dlci 102(0x66,0x1860), static,
broadcast,
CISCO, status defined, active
Serial0/0 (up): ip 123.123.123.3 dlci 103(0x67,0x1870), static,
broadcast,
CISCO, status defined, active
R2(config)#do sh fram map
Serial0/0 (up): ip 123.123.123.1 dlci 201(0xC9,0x3090), static,
broadcast,
CISCO, status defined, active
Serial0/0 (up): ip 123.123.123.3 dlci 201(0xC9,0x3090), static,
CISCO, status defined, active
R3#sh fram map
Serial0/0 (up): ip 123.123.123.2 dlci 301(0x12D,0x48D0), static,
CISCO, status defined, active
Serial0/0 (up): ip 123.123.123.1 dlci 301(0x12D,0x48D0), static,
broadcast,
CISCO, status defined, active
Make sure IP point to point already ok by test ping
R1#ping 123.123.123.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 123.123.123.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/23/52 ms
R1#ping 123.123.123.3
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 123.123.123.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/11/28 ms
R2(config)#do ping 123.123.123.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 123.123.123.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/19/52 ms
R2(config)#do ping 123.123.123.3
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 123.123.123.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 4/31/92 ms
Now, lets configure OSPF so the ip loopback can be ping
R1(config)#router ospf 1
R1(config-router)#network 1.1.1.1 0.0.0.0 area 0
R1(config-router)#network 123.123.123.1 0.0.0.0 area 0
R2(config)#router ospf 2
R2(config-router)#network 2.2.2.2 0.0.0.0 area 0
R2(config-router)#network 123.123.123.2 0.0.0.0 area 0
R3(config-if)#router ospf 3
R3(config-router)#network 3.3.3.3 0.0.0.0 area 0
R3(config-router)#network 123.123.123.3 0.0.0.0 area 0
Check OSPF neighbor
R1(config-router)#do sh ip ospf neighbor
R1(config-router)#
R2(config-if)#do sh ip ospf nei
R2(config-if)#
Hmm, actually default frame relay is Non Broadcast. It means no any OSPF adjacency to the neighbor by default. So we need to introduce all neighbors in OSPF
R3(config-if)#do sh ip ospf int s0/0
Serial0/0 is up, line protocol is up
Internet Address 123.123.123.3/24, Area 0
Process ID 3, Router ID 3.3.3.3, Network Type NON_BROADCAST, Cost: 64
As we use hub, we need introduce all neighbors in hub only. In this example R1 is hub and R2 and R3 is spoke.
R1(config-if)#router ospf 1
R1(config-router)#neighbor 123.123.123.2
R1(config-router)#nei 123.123.123.3
Let's check the OSPF neighbor and routing table in R1, R2, and R3.
R1(config-router)#do sh ip ospf nei
Neighbor ID Pri State Dead Time Address Interface
2.2.2.2 1 FULL/DROTHER 00:01:46 123.123.123.2 Serial0/0
3.3.3.3 1 FULL/DR 00:01:35 123.123.123.3 Serial0/0
R2(config-if)#do sh ip ospf nei
Neighbor ID Pri State Dead Time Address Interface
1.1.1.1 1 FULL/BDR 00:01:41 123.123.123.1 Serial0/0
R3(config-if)#do sh ip ospf nei
Neighbor ID Pri State Dead Time Address Interface
1.1.1.1 1 FULL/BDR 00:01:36 123.123.123.1 Serial0/0
R1(config-router)#do sh ip rou
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
1.0.0.0/32 is subnetted, 1 subnets
C 1.1.1.1 is directly connected, Loopback0
3.0.0.0/32 is subnetted, 1 subnets
O 3.3.3.3 [110/65] via 123.123.123.3, 00:05:27, Serial0/0
123.0.0.0/24 is subnetted, 1 subnets
C 123.123.123.0 is directly connected, Serial0/0
R2(config-if)#do sh ip rout
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
2.0.0.0/32 is subnetted, 1 subnets
C 2.2.2.2 is directly connected, Loopback0
123.0.0.0/24 is subnetted, 1 subnets
C 123.123.123.0 is directly connected, Serial0/0
R3(config-if)#do 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
1.0.0.0/32 is subnetted, 1 subnets
O 1.1.1.1 [110/65] via 123.123.123.1, 00:05:41, Serial0/0
3.0.0.0/32 is subnetted, 1 subnets
C 3.3.3.3 is directly connected, Loopback0
123.0.0.0/24 is subnetted, 1 subnets
C 123.123.123.0 is directly connected, Serial0/0
If we see in R2 and R3 the routing table is not complete. Than from neighbor information, 3.3.3.3 is the DR. So, this is the problem. R1 is hub and should be DR. Let's change R1 to be DR and R2/R3 can not be DR.
R1(config-router)#INT S0/0
R1(config-if)#ip ospf priority 255
R1(config-if)#shut
R1(config-if)#no shut
R2(config)#int s0/0
R2(config-if)#ip ospf prio 0
R2(config-if)#shut
R2(config-if)#no shu
R3(config-if)#int s0/0
R3(config-if)#ip ospf prio 0
R3(config-if)#shut
R3(config-if)#no shu
Just wait a moment... This is frame relay :)
*Mar 1 00:36:06.643: %OSPF-5-ADJCHG: Process 1, Nbr 0.0.0.0 on Serial0/0 from ATTEMPT to DOWN, Neighbor Down: Dead timer expired
*Mar 1 00:36:06.831: %OSPF-5-ADJCHG: Process 1, Nbr 3.3.3.3 on Serial0/0 from LOADING to FULL, Loading Done
*Mar 1 00:36:06.955: %OSPF-5-ADJCHG: Process 1, Nbr 2.2.2.2 on Serial0/0 from LOADING to FULL, Loading Done
Oups, now the neighbor adjacency already up again. Let's check again the OSPF neighbor and routing table :)
R1(config-if)#do sh ip ospf nei
Neighbor ID Pri State Dead Time Address Interface
2.2.2.2 0 FULL/DROTHER 00:01:57 123.123.123.2 Serial0/0
3.3.3.3 0 FULL/DROTHER 00:01:50 123.123.123.3 Serial0/0
R2(config-if)#do sh ip ospf nei
Neighbor ID Pri State Dead Time Address Interface
1.1.1.1 255 FULL/DR 00:01:56 123.123.123.1 Serial0/0
R3(config-if)#do sh ip ospf nei
Neighbor ID Pri State Dead Time Address Interface
1.1.1.1 255 FULL/DR 00:01:37 123.123.123.1 Serial0/0
R1(config-if)#do sh ip rou
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
1.0.0.0/32 is subnetted, 1 subnets
C 1.1.1.1 is directly connected, Loopback0
2.0.0.0/32 is subnetted, 1 subnets
O 2.2.2.2 [110/65] via 123.123.123.2, 00:04:01, Serial0/0
3.0.0.0/32 is subnetted, 1 subnets
O 3.3.3.3 [110/65] via 123.123.123.3, 00:04:01, Serial0/0
123.0.0.0/24 is subnetted, 1 subnets
C 123.123.123.0 is directly connected, Serial0/0
R2(config-if)#do sh ip rout
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
1.0.0.0/32 is subnetted, 1 subnets
O 1.1.1.1 [110/65] via 123.123.123.1, 00:04:15, Serial0/0
2.0.0.0/32 is subnetted, 1 subnets
C 2.2.2.2 is directly connected, Loopback0
3.0.0.0/32 is subnetted, 1 subnets
O 3.3.3.3 [110/65] via 123.123.123.3, 00:04:15, Serial0/0
123.0.0.0/24 is subnetted, 1 subnets
C 123.123.123.0 is directly connected, Serial0/0
R3(config-if)#do sh ip rou
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
1.0.0.0/32 is subnetted, 1 subnets
O 1.1.1.1 [110/65] via 123.123.123.1, 00:04:32, Serial0/0
2.0.0.0/32 is subnetted, 1 subnets
O 2.2.2.2 [110/65] via 123.123.123.2, 00:04:22, Serial0/0
3.0.0.0/32 is subnetted, 1 subnets
C 3.3.3.3 is directly connected, Loopback0
123.0.0.0/24 is subnetted, 1 subnets
C 123.123.123.0 is directly connected, Serial0/0
Now R2 should be able to ping to R3 and vice versa
R2(config-if)#do ping 3.3.3.3
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 3.3.3.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 8/32/108 ms
R3(config-if)#do ping 2.2.2.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 2.2.2.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/29/84 ms
