Hi,
I'm having problems with ospf in the current setup;
2 customer L3 switches (S1 and S2)(using 3750s to simulate)(Running ospf only) dual homed to 2 x 3750 metro switches running ospf and BGP (S3 and S4). These 2 switches connect to another switch that I have setup to simulate a BT BGP peer (S5).
It all runs fine at first. One of the Metros is the preferred route that will have a faster link.
The problem occurs when I power off the preferred gateway metro switch. When it comes back its neighbours can all be seen but it does not learn any ospf routes at all. This happens until the ospf process is cleared and then the ospf routes return. running 12.2-25.SEG3
S1
router ospf 100
router-id 172.29.0.133
log-adjacency-changes
network 172.16.0.0 0.0.0.255 area 0
network 172.16.1.0 0.0.0.255 area 0
network 172.16.2.0 0.0.0.127 area 0
network 172.16.2.240 0.0.0.7 area 0
network 172.16.3.0 0.0.0.255 area 0
network 172.29.0.132 0.0.0.3 area 0
S2
router ospf 100
router-id 172.29.0.137
log-adjacency-changes
network 172.16.0.0 0.0.0.255 area 0
network 172.16.1.0 0.0.0.255 area 0
network 172.16.2.0 0.0.0.127 area 0
network 172.16.2.248 0.0.0.7 area 0
network 172.16.3.0 0.0.0.255 area 0
network 172.29.0.136 0.0.0.3 area 0
S3
router ospf 1
log-adjacency-changes
passive-interface FastEthernet1/0/24
network 172.16.2.240 0.0.0.7 area 0
network 172.16.2.248 0.0.0.7 area 0
network 172.41.1.16 0.0.0.0 area 0
network 172.41.2.60 0.0.0.3 area 0
default-information originate metric 100
!
router bgp 6001
no synchronization
bgp router-id 172.41.2.61
bgp log-neighbor-changes
redistribute ospf 1
neighbor 172.41.2.62 remote-as 2856
neighbor 172.41.2.62 ebgp-multihop 255
neighbor 172.41.2.62 update-source FastEthernet1/0/24
neighbor 172.41.2.62 route-map setMED out
no auto-summary
!
route-map setMED permit 10
set metric 100
!
S4
router ospf 1
log-adjacency-changes
passive-interface FastEthernet1/0/24
network 172.16.2.240 0.0.0.7 area 0
network 172.16.2.248 0.0.0.7 area 0
network 172.41.1.17 0.0.0.0 area 0
network 172.41.2.64 0.0.0.3 area 0
default-information originate metric 200
!
router bgp 6002
no synchronization
bgp router-id 172.41.2.65
bgp log-neighbor-changes
redistribute ospf 1
neighbor 172.41.2.66 remote-as 2856
neighbor 172.41.2.66 ebgp-multihop 255
neighbor 172.41.2.66 update-source FastEthernet1/0/24
neighbor 172.41.2.66 route-map setMED out
no auto-summary
!
route-map setMED permit 10
set metric 200
!
