OSPF help

[alexhosier]

Hello,

I have a OSPF routing issue

Say we have 3 routers

R1 and R2 are connected through a physical interface, useing the config:

interface GigabitEthernet1/0/28

switchport trunk encapsulation dot1q

switchport trunk allowed vlan 1,2,3

switchport mode trunk

router ospf 1

area 0.0.0.0 authentication message-digest

network 10.0.0.0 0.0.0.15 area 0.0.0.0

network 10.1.0.0 0.0.0.31 area 0.0.0.0

network 10.2.0.0 0.0.255.255 area 0.0.0.0

They are transfering OSPF routes between each other.

So R3 is connected to R1 through a network drop and into an interface also using the config below on both sides and same ospf router 1 above.

switchport trunk encapsulation dot1q

switchport trunk allowed vlan 1,2,3

switchport mode trunk

However on R3 I am not getting any OSPF routes....any thoughts?

[mahmoodmkl]

Hi
can u please provide more details
the interface configs on the routers can be useful

Sent from Cisco Technical Support iPhone App

[stephenshaw]

Hi,

you may have an authentication string mismatch. Run "debug ip ospf events" and you should see if that is the case. If there is a mismatch, no routes will show up in the table.

HTH,

Steve