switch not sharing networks to other ospf neighbours.

[Question]

I have a problem i configured ospf but this switch does not get the networks friom other switches in the configuration it only gives it's own. please how can i solve this?

L3 switch:

# sh ip route

Codes: C - connected, S - static, I - IGRP, 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, E - EGP

i - IS-IS, 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 172.45.2.4 to network 0.0.0.0

172.16.0.0/24 is subnetted, 1 subnets

C 172.16.45.0 is directly connected, Vlan100

172.17.0.0/24 is subnetted, 1 subnets

C 172.17.45.0 is directly connected, Vlan200

172.18.0.0/24 is subnetted, 1 subnets

C 172.18.45.0 is directly connected, Vlan300

172.19.0.0/24 is subnetted, 1 subnets

C 172.19.45.0 is directly connected, Vlan400

172.20.0.0/24 is subnetted, 1 subnets

C 172.20.45.0 is directly connected, Vlan500

172.45.0.0/29 is subnetted, 1 subnets

C 172.45.2.0 is directly connected, Port-channel3

S* 0.0.0.0/0 [1/0] via 172.45.2.4

configuration:

router ospf 100

router-id 5.5.5.5

log-adjacency-changes

network 172.45.2.0 0.0.0.7 area 0

network 172.16.45.0 0.0.0.255 area 0

network 172.20.45.0 0.0.0.255 area 0

network 172.18.45.0 0.0.0.255 area 0

!

[Richard Burts]

We do not have enough information to be able to understand your issue or to provide useful advice. Please provide output of these commands:

show ip ospf interface

show ip ospf neighbor

show cdp neighbor

[Question]

#sh cdp neighbors

Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge

S - Switch, H - Host, I - IGMP, r - Repeater, P - Phone

Device ID Local Intrfce Holdtme Capability Platform Port ID

SW-1AE Gig 1/0/2 85 S 2960 Gig 0/2

SW0-AE Gig 1/0/7 85 S 2960 Fas 0/3

MIL-AE Gig 1/0/3 145 3650 Gig 1/0/3

MIL-AE Gig 1/0/4 145 3650 Gig 1/0/4

SW2-AE Por 4 144 S 2960 Fas 0/2

SW-1AE Gig 1/0/1 85 S 2960 Gig 0/1

SW-1AE Gig 1/0/1 85 S 2960 Por 1

SW0-AE Gig 1/0/8 85 S 2960 Fas 0/4

SW0-AE Gig 1/0/8 85 S 2960 Por 3

SW0-AE Por 3 145 S 2960 Fas 0/4

SW0-AE Por 3 145 S 2960 Por 3

SW-1AE Por 1 145 S 2960 Gig 0/2

SW0-AE Por 3 145 S 2960 Fas 0/3

SW2-AE Por 4 144 S 2960 Fas 0/1

SW2-AE Por 4 144 S 2960 Por 4

SW-1AE Por 1 145 S 2960 Gig 0/1

SW-1AE Por 1 145 S 2960 Por 1

sh ip ospf neighbor

Neighbor ID  Pri    State Dead Time Address Interface

1.1.1.1       0      FULL/DROTHER 00:00:34 172.45.2.2 Port-channel3

3.3.3.3     0        FULL/DROTHER 00:00:34 172.45.2.3 Port-channel3

4.4.4.4    254     FULL/DR 00:00:34 172.45.2.5 Port-channel3

2.2.2.2     0        FULL/DROTHER 00:00:34 172.45.2.4 Port-channel3

sh ip ospf interface

Vlan100 is up, line protocol is up

Internet address is 172.16.45.2/24, Area 0

Process ID 100, Router ID 5.5.5.5, Network Type BROADCAST, Cost: 1

Transmit Delay is 1 sec, State DR, Priority 1

Designated Router (ID) 5.5.5.5, Interface address 172.16.45.2

No backup designated router on this network

Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5

Hello due in 00:00:03

Index 1/1, flood queue length 0

Next 0x0(0)/0x0(0)

Last flood scan length is 1, maximum is 1

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)

Vlan300 is up, line protocol is up

Internet address is 172.18.45.2/24, Area 0

Process ID 100, Router ID 5.5.5.5, Network Type BROADCAST, Cost: 1

Transmit Delay is 1 sec, State DR, Priority 1

Designated Router (ID) 5.5.5.5, Interface address 172.18.45.2

No backup designated router on this network

Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5

Hello due in 00:00:03

Index 2/2, flood queue length 0

Next 0x0(0)/0x0(0)

Last flood scan length is 1, maximum is 1

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)

Vlan500 is up, line protocol is up

Internet address is 172.20.45.2/24, Area 0

Process ID 100, Router ID 5.5.5.5, Network Type BROADCAST, Cost: 1

Transmit Delay is 1 sec, State DR, Priority 1

Designated Router (ID) 5.5.5.5, Interface address 172.20.45.2

No backup designated router on this network

Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5

Hello due in 00:00:03

Index 3/3, flood queue length 0

Next 0x0(0)/0x0(0)

Last flood scan length is 1, maximum is 1

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)

Vlan400 is up, line protocol is up

Internet address is 172.19.45.2/24, Area 0

Process ID 100, Router ID 5.5.5.5, Network Type BROADCAST, Cost: 1

Transmit Delay is 1 sec, State DR, Priority 1

Designated Router (ID) 5.5.5.5, Interface address 172.19.45.2

No backup designated router on this network

Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5

Index 4/4, flood queue length 0

Next 0x0(0)/0x0(0)

Last flood scan length is 1, maximum is 1

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)

Vlan200 is up, line protocol is up

Internet address is 172.17.45.2/24, Area 0

Process ID 100, Router ID 5.5.5.5, Network Type BROADCAST, Cost: 1

Transmit Delay is 1 sec, State DR, Priority 1

Designated Router (ID) 5.5.5.5, Interface address 172.17.45.2

No backup designated router on this network

Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5

Index 5/5, flood queue length 0

Next 0x0(0)/0x0(0)

Last flood scan length is 1, maximum is 1

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)

Port-channel3 is up, line protocol is up

Internet address is 172.45.2.1/29, Area 0

Process ID 100, Router ID 5.5.5.5, Network Type BROADCAST, Cost: 1

Transmit Delay is 1 sec, State BDR, Priority 255

Designated Router (ID) 4.4.4.4, Interface address 172.45.2.5

Backup Designated Router (ID) 5.5.5.5, Interface address 172.45.2.1

Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5

Hello due in 00:00:04

Index 6/6, flood queue length 0

Next 0x0(0)/0x0(0)

Last flood scan length is 1, maximum is 1

Last flood scan time is 0 msec, maximum is 0 msec

Neighbor Count is 4, Adjacent neighbor count is 4

Adjacent with neighbor 1.1.1.1

Adjacent with neighbor 3.3.3.3

Adjacent with neighbor 4.4.4.4 (Designated Router)

Adjacent with neighbor 2.2.2.2

Suppress hello for 0 neighbor(s)

Message digest authentication enabled

Youngest key id is 1

[Richard Burts]

Thanks for the additional information. The results are quite puzzling. The output of show ip ospf neighbor shows that there are 4 neighbors. But the output of show ip ospf interface indicates these

No backup designated router on this network

Neighbor Count is 0, Adjacent neighbor count is 0

These outputs seem to be mutually contradictory. Is this implemented on real hardware or implemented in some emulator? Is so which emulator?

[Jon Marshall]

Rick 

Unless I am reading it incorrectly this router is the BDR and it has does have 4 neighbors on the port channel interface 172.45.2.1 (the last interface in the output). 

Perhaps the neighbors are not advertising any routes ? 

Jon

[Richard Burts]

Jon

You are correct. I read carefully the first several interfaces (vlan interfaces) and was not as careful as I got toward the bottom on the output and missed the fact that port channel does have OSPF neighbors.

So the question is why are those neighbors not advertising any networks? We need the original poster to provide more detail about the topology and the environment of those neighbors.

[Georg Pauwen]

Hello,

I agree with Richard, the output does not make much sense. Can you post the full running configuration of this switch and one neigbor ?

[Deepak Kumar]

Hello, 

Can you share a few more outputs as

Show run | se r o

Show ip ospf inter br

show ip protocol