Why does OSPF not generate routes here?

[revenicus]

I attached the packet tracer file, but here are the configs for the two switches connected via layer 3 etherchannel. I have a computer attached to each switch on vlan 10 (f0/1), and they can't ping each other. 

Switch1

Current configuration : 1754 bytes

!

version 12.2(37)SE1

no service timestamps log datetime msec

no service timestamps debug datetime msec

no service password-encryption

!

hostname Switch1

!

!

!

!

!

!

ip routing

!

!

!

!

!

!

!

!

!

!

!

!

!

ip domain-name jon.local

!

!

spanning-tree mode pvst

!

!

!

!

!

!

interface Loopback0

ip address 192.168.255.1 255.255.255.255

!

interface Port-channel1

no switchport

ip address 192.168.0.1 255.255.255.0

!

interface FastEthernet0/1

switchport access vlan 10

!

interface FastEthernet0/2

!

interface FastEthernet0/3

!

interface FastEthernet0/4

!

interface FastEthernet0/5

!

interface FastEthernet0/6

!

interface FastEthernet0/7

!

interface FastEthernet0/8

!

interface FastEthernet0/9

!

interface FastEthernet0/10

!

interface FastEthernet0/11

!

interface FastEthernet0/12

!

interface FastEthernet0/13

!

interface FastEthernet0/14

!

interface FastEthernet0/15

!

interface FastEthernet0/16

!

interface FastEthernet0/17

!

interface FastEthernet0/18

!

interface FastEthernet0/19

!

interface FastEthernet0/20

!

interface FastEthernet0/21

!

interface FastEthernet0/22

!

interface FastEthernet0/23

!

interface FastEthernet0/24

!

interface GigabitEthernet0/1

no switchport

no ip address

channel-group 1 mode active

duplex auto

speed auto

!

interface GigabitEthernet0/2

no switchport

no ip address

channel-group 1 mode active

duplex auto

speed auto

!

interface Vlan1

no ip address

shutdown

!

interface Vlan10

mac-address 0050.0fd3.9b02

ip address 192.168.10.1 255.255.255.0

!

router ospf 10

log-adjacency-changes

network 192.168.10.0 0.0.0.255 area 0

network 192.168.255.1 0.0.0.0 area 0

network 192.168.0.0 0.0.0.255 area 0

!

ip classless

!

ip flow-export version 9

!

!

!

!

!

!

!

!

line con 0

!

line aux 0

!

line vty 0 4

login

!

!

!

!

end

Switch2

Current configuration : 1754 bytes

!

version 12.2(37)SE1

no service timestamps log datetime msec

no service timestamps debug datetime msec

no service password-encryption

!

hostname Switch2

!

!

!

!

!

!

ip routing

!

!

!

!

!

!

!

!

!

!

!

!

!

ip domain-name jon.local

!

!

spanning-tree mode pvst

!

!

!

!

!

!

interface Loopback0

ip address 192.168.255.2 255.255.255.255

!

interface Port-channel1

no switchport

ip address 192.168.0.2 255.255.255.0

!

interface FastEthernet0/1

switchport access vlan 10

!

interface FastEthernet0/2

!

interface FastEthernet0/3

!

interface FastEthernet0/4

!

interface FastEthernet0/5

!

interface FastEthernet0/6

!

interface FastEthernet0/7

!

interface FastEthernet0/8

!

interface FastEthernet0/9

!

interface FastEthernet0/10

!

interface FastEthernet0/11

!

interface FastEthernet0/12

!

interface FastEthernet0/13

!

interface FastEthernet0/14

!

interface FastEthernet0/15

!

interface FastEthernet0/16

!

interface FastEthernet0/17

!

interface FastEthernet0/18

!

interface FastEthernet0/19

!

interface FastEthernet0/20

!

interface FastEthernet0/21

!

interface FastEthernet0/22

!

interface FastEthernet0/23

!

interface FastEthernet0/24

!

interface GigabitEthernet0/1

no switchport

no ip address

channel-group 1 mode active

duplex auto

speed auto

!

interface GigabitEthernet0/2

no switchport

no ip address

channel-group 1 mode active

duplex auto

speed auto

!

interface Vlan1

no ip address

shutdown

!

interface Vlan10

mac-address 000b.be0c.bd01

ip address 192.168.10.2 255.255.255.0

!

router ospf 10

log-adjacency-changes

network 192.168.10.0 0.0.0.255 area 0

network 192.168.255.2 0.0.0.0 area 0

network 192.168.0.0 0.0.0.255 area 0

!

ip classless

!

ip flow-export version 9

!

!

!

!

!

!

!

!

line con 0

!

line aux 0

!

line vty 0 4

login

!

!

!

!

end

[Reza Sharifi]

Is there a neighborship between the 2 switches?

sh ip ospf nei

should show you that.

HTH

[Richard Burts]

I agree that show ip ospf neighbor is a good starting point. It would also be helpful if there were some type of diagram which could clarify the relationships. And the output of show cdp neighbors might be helpful.

We are told that the switches are connected by EtherChannel. So I am surprised to see that both switches have a loopback interface in network 192.168.255.0. And surprised to see that both switches have a vlan 10 in network 192.168.10.0. So each switch has an interface in network 192.168.10.0. The switch will receive an OSPF advertisement for that network. But since there is a locally connected network that is what is inserted into the routing table and the OSPF advertised route is not inserted into the routing table.

This is a seriously flawed network design.

[MHM Cisco World]

friend, since they share same VLAN which is VLAN 10 they need L2 connect, only connect both SW with one L2 link and your issue will be solve.

[Martin L]

OSPF is fine and established adjacency and route is exchange. Problem is with IP addressing of PCs. it is the same

192.168.10.x /24 network. PC0 with 192.168.10.101 pings PC1 192.168.10.102.  they are on the same network/subnet! no routing is needed!   This is not going to work without NAT between them and NAT is not supported on switches; need router for NAT/PAT thing. 

I would change one of PCs addressing to different subnet and corresponding switch vlan 10 to match PC subnet.

Regards, ML
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