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New Member

OSPF Troubleshooting - updates

sh log for router A says:

2d00h: OSPF: Send with youngest Key 10

2d00h: OSPF: Rcv pkt from 10.10.248.1, FastEthernet0/0, area 0.0.0.0 : src not on the same network

abbreviated router configs

int fa0/0

ip address 192.168.129.37 255.255.255.240

ip ospf message-digest-key 10 xxx

router ospf 100

router-id 192.168.129.37

area 0 authentication message-digest

redistribute static subnets

network 192.168.129.0 0.0.0.255 area 0

router b

fa 0/1

ip address 10.10.248.1 255.255.255.0

ip address 192.168.129.33 255.255.255.240 secondary

ip ospf message-digest-key 10 xxx

router ospf 100

router-id 10.10.248.1

area 0 authentication message-digest

redistribute static subnets

network 10.10.248.0 0.0.0.255 area 0

network 192.168.129.0 0.0.0.255 area 0

Do I need to have the primary ip address for router b within the same network block as router A to exchange updates?

3 REPLIES

Re: OSPF Troubleshooting - updates

yes you do.

OSPF does not form neighbors on secondary networks.

New Member

Re: OSPF Troubleshooting - updates

Yes. In fact, you should only be able to form adjacencies on the primary subnet.

Alvaro.

New Member

Re: OSPF Troubleshooting - updates

Thanks, everything works fine now.

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