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?
