vlan routing with ospf

[shaqkori]

Subject: Need help configuring OSPF on a multi-router network

Hello,

I'm having some trouble configuring OSPF on my network, and I'm hoping someone can help me out. I have several routers connected together, each with their own VLANs in different networks. I want to be able to route traffic between these VLANs using OSPF.

I've tried setting up OSPF using the commands "router ospf 1", " and adding the addresses of the sub interfaces , but there are no adjacencies being formed 

Here's a diagram of my network:

Can anyone help me figure out what I'm doing wrong? I can provide more details about my configuration if needed.

Thanks in advance for any help you can provide!

[Flavio Miranda]

Hello,

 If you enabled "router ospf 1"  On each router, what you need to do now is advertise the OSPF on every interface.

You can do this by using the interface network. 

router osp1

network x.x.x.x x.x.x.x (wildcard mask) area 0

Then you can use a command to simplify you configuration, which is:

redistribute connected. 

After that, you only nee to check in each router with the command:

show ip ospf nei 

and show ip route ospf

[shaqkori]

ive done this but i want to advertise the routes of the different vlans but nothing happens

[Flavio Miranda]

You need to check first the adjacency. If you have neighbor, you are good. 

Then, you add the command network in order to advertise. 

But, you need to use Area 0 (Zero) . 

[MHM Cisco World]

Can you share config as text 

[shaqkori]

Router ospf 1

Network 172.16.16.0 0.0.0.255 area 1

Network 172.16.17.0 0.0.0.255 area 1

Network 172.16.18.0 0.0.0.255 area 1

this is the routes for the sub interfaces

[shaqkori]

Router#show ip ospf

Routing Process "ospf 1" with ID 1.0.0.0

FastEthernet0/0.1 is up, line protocol is up

Internet address is 172.16.16.1/24, Area 1

Process ID 1, Router ID 1.0.0.0, Network Type BROADCAST, Cost: 1

Transmit Delay is 1 sec, State DR, Priority 1

Designated Router (ID) 1.0.0.0, Interface address 172.16.16.1

No backup designated router on this network

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

Hello due in 00:00:08

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)

FastEthernet0/0.2 is up, line protocol is up

Internet address is 172.16.17.1/24, Area 1

Process ID 1, Router ID 1.0.0.0, Network Type BROADCAST, Cost: 1

Transmit Delay is 1 sec, State DR, Priority 1

Designated Router (ID) 1.0.0.0, Interface address 172.16.17.1

No backup designated router on this network

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

Hello due in 00:00:08

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)

FastEthernet0/0.3 is up, line protocol is up

Internet address is 172.16.18.1/24, Area 1

Process ID 1, Router ID 1.0.0.0, Network Type BROADCAST, Cost: 1

Transmit Delay is 1 sec, State DR, Priority 1

Designated Router (ID) 1.0.0.0, Interface address 172.16.18.1

No backup designated router on this network

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

Hello due in 00:00:08

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)

Serial0/1/0 is up, line protocol is up

Internet address is 1.0.0.1/30, Area 1

Process ID 1, Router ID 1.0.0.0, Network Type POINT-TO-POINT, Cost: 64

Transmit Delay is 1 sec, State POINT-TO-POINT,

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

Hello due in 00:00:04

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 1 , Adjacent neighbor count is 1

Adjacent with neighbor 1.0.0.5

Suppress hello for 0 neighbor(s)

Serial0/1/1 is up, line protocol is up

Internet address is 1.0.0.29/30, Area 1

Process ID 1, Router ID 1.0.0.0, Network Type POINT-TO-POINT, Cost: 64

Transmit Delay is 1 sec, State POINT-TO-POINT,

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

Hello due in 00:00:06

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 1 , Adjacent neighbor count is 1

Adjacent with neighbor 1.0.0.30

Suppress hello for 0 neighbor(s)

Supports only single TOS(TOS0) routes

Supports opaque LSA

SPF schedule delay 5 secs, Hold time between two SPFs 10 secs

Minimum LSA interval 5 secs. Minimum LSA arrival 1 secs

Number of external LSA 0. Checksum Sum 0x000000

Number of opaque AS LSA 0. Checksum Sum 0x000000

Number of DCbitless external and opaque AS LSA 0

Number of DoNotAge external and opaque AS LSA 0

Number of areas in this router is 1. 1 normal 0 stub 0 nssa

External flood list length 0

Area 1

Number of interfaces in this area is 5

Area has no authentication

SPF algorithm executed 4 times

Area ranges are

Number of LSA 16. Checksum Sum 0x06b35e

Number of opaque link LSA 0. Checksum Sum 0x000000

Number of DCbitless LSA 0

Number of indication LSA 0

Number of DoNotAge LSA 0

Flood list length 0

1.0.0.30 0 FULL/ - 00:00:35 1.0.0.30 Serial0/1/1

1.0.0.5 0 FULL/ - 00:00:34 1.0.0.2 Serial0/1/0

Router#

[MHM Cisco World]

Friend' if these subinterface is in area 1 then router that these subinterface is connect to must also connect to area 0 otherwise router never advertise lsa3 for these subinterface subnet to other router.

So either config all area same in all router 

Or 

Make subinterface in different area and make area  interconnect routers area 0