OSPF between two L3 switches are not working

[Khaleelur Rahman]

Hi Team,

i have configured OSPF for two different L3 switches. but the current situation is that link is not working. Please Find the config below

Trichy CORE:

############

!
interface GigabitEthernet1/0/3
 description >>>>> AIRTEL SEZ-U4 <<<<<
 no switchport
 ip address 192.168.15.41 255.255.255.252
 ip ospf network non-broadcast
 ip ospf priority 10
 speed 100
 duplex full
!

!
router ospf 100
 network 10.110.16.0 0.0.1.255 area 0.0.0.0
 network 192.168.15.40 0.0.0.3 area 0.0.0.0
 network 192.168.15.44 0.0.0.3 area 0.0.0.0
!

##############################################################

Chennai Core:

###########

!
interface GigabitEthernet1/0/19
 description connectivity to trichy SEZ
 no switchport
 ip address 192.168.15.42 255.255.255.252
 ip ospf network non-broadcast
 ip ospf 100 area 0.0.0.0
 speed 100
 duplex full
!

!
router ospf 100
 network 10.49.13.128 0.0.0.127 area 0.0.0.0
 network 10.110.19.0 0.0.0.255 area 0.0.0.0
 network 192.168.12.0 0.0.0.255 area 0.0.0.0
 network 192.168.14.0 0.0.0.255 area 0.0.0.0
 network 192.168.15.12 0.0.0.3 area 0.0.0.0
 network 192.168.15.16 0.0.0.3 area 0.0.0.0
 network 192.168.15.20 0.0.0.3 area 0.0.0.0
 network 192.168.15.28 0.0.0.3 area 0.0.0.0
 network 192.168.15.36 0.0.0.3 area 0.0.0.0
 network 192.168.15.40 0.0.0.3 area 0.0.0.0
 network 192.168.18.0 0.0.0.255 area 0.0.0.0
 network 192.168.20.12 0.0.0.3 area 0.0.0.0
 network 192.168.20.16 0.0.0.3 area 0.0.0.0
 network 192.168.24.40 0.0.0.3 area 0.0.0.0
 network 192.168.100.0 0.0.0.255 area 0.0.0.0
!

when i was using the command " neighbor 192.168.15.42 " and " neighbor 192.168.15.41" that the link is working properly. Otherwise its not working , so kindly advise to help me in this situation

Regards 

Khaleelur Rahman

[paul driver]

Hello

Non Broadcast  means non broadcast/multicast capable link - Thats why when you apply the neighbour command ( which is unicast) the adjecancy is successfull.

If these devcies only require a point-to-point connection, then try changing the opsf network type occordingly.

res

Paul

[Khaleelur Rahman]

Dear Paul,

The Trichy Core and Chennai Core switches are connected through the ISP.

So kindly advice me is there have any other best way to connect each other?

Regards 

Khaleelur Rahman

[paul driver]

Hello

Not knowing you current network topology it hard to suggest.

However your present config looks like it setup as a NBMA Hub/Spoke OSPF topology.

The Chennai core being the Hub router and the Designated router which will have full visibility to all other ospf spokes within you network thus supplying connection between them.

What's the reason why you wish to change setup, seeing as youve have stated it works at present?

res

Paul