09-09-2009 07:01 AM - edited 03-04-2019 05:59 AM
All,
I'm playing with redistribution from OSPF into BGP for failover routes. The problem is that BGP doesn't show in the routing table until I clear the ospf process. These are set at the default distances:
RTRB#sh ip protocols
Routing Protocol is "bgp 3000"
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
IGP synchronization is disabled
Automatic route summarization is disabled
Redistributing: ospf 1 (internal)
Neighbor(s):
Address FiltIn FiltOut DistIn DistOut Weight RouteMap
192.168.2.2
Maximum path: 1
Routing Information Sources:
Gateway Distance Last Update
10.12.12.1 20 00:44:30
192.168.2.2 20 00:13:03
Distance: external 20 internal 200 local 200
Routing Protocol is "ospf 1"
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Router ID 3.3.3.1
Number of areas in this router is 1. 1 normal 0 stub 0 nssa
Maximum path: 4
Routing for Networks:
10.12.12.0 0.0.0.3 area 0
192.168.2.0 0.0.0.3 area 0
Routing Information Sources:
Gateway Distance Last Update
1.1.1.1 110 00:32:13
192.168.1.1 110 00:05:02
172.12.5.2 110 00:05:02
Distance: (default is 110)
1.0.0.0/24 is subnetted, 1 subnets
O 1.1.1.0 [110/3] via 10.12.12.1, 00:08:10, FastEthernet0/1
3.0.0.0/24 is subnetted, 1 subnets
C 3.3.3.0 is directly connected, Loopback1
172.12.0.0/30 is subnetted, 1 subnets
O 172.12.5.0 [110/2] via 10.12.12.1, 00:08:10, FastEthernet0/1
10.0.0.0/30 is subnetted, 1 subnets
C 10.12.12.0 is directly connected, FastEthernet0/1
192.168.1.0/30 is subnetted, 1 subnets
O 192.168.1.0 [110/3] via 10.12.12.1, 00:08:10, FastEthernet0/1
192.168.2.0/30 is subnetted, 1 subnets
C 192.168.2.0 is directly connected, FastEthernet0/0
RTRB#sh ip bgp
BGP table version is 59, local router ID is 3.3.3.1
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
* 1.1.1.0/24 192.168.2.2 0 100 1000 i
*> 10.12.12.1 3 32768 ?
*> 3.3.3.0/24 0.0.0.0 0 32768 i
*> 10.12.12.0/30 0.0.0.0 0 32768 ?
* 172.12.5.0/30 192.168.2.2 0 100 1000 i
*> 10.12.12.1 2 32768 ?
* 192.168.1.0/30 192.168.2.2 0 100 1000 i
*> 10.12.12.1 3 32768 ?
*> 192.168.2.0/30 0.0.0.0 0 32768 i
router ospf 1
log-adjacency-changes
network 10.12.12.0 0.0.0.3 area 0
network 192.168.2.0 0.0.0.3 area 0
!
router bgp 3000
no synchronization
bgp log-neighbor-changes
network 3.3.3.0 mask 255.255.255.0
network 192.168.2.0 mask 255.255.255.252
redistribute ospf 1 match internal
neighbor 192.168.2.2 remote-as 100
no auto-summary
Thanks,
John
Solved! Go to Solution.
09-09-2009 08:07 AM
John
You are having fun with BGP at the moment :-)
Rather than change the OSPF weight you actually just make the BGP weight perferable ie.
router bgp 3000
neighbor 192.168.2.2 weight 40000
Jon
09-09-2009 07:28 AM
I know why it's not. "sh ip bgp" shows that the weight for the redistributed route is 32768, but the externally learned route from BGP is 0. How can I change the weight of the redistributed OSPF since it thinks it's locally generated?
Thanks,
John
09-09-2009 08:07 AM
John
You are having fun with BGP at the moment :-)
Rather than change the OSPF weight you actually just make the BGP weight perferable ie.
router bgp 3000
neighbor 192.168.2.2 weight 40000
Jon
09-09-2009 08:23 AM
..or route-map with set weight - then redistribute OSPF into BGP with such route-map..
Having the weight at the neighbor level will affect all routes, not just OSPF routes.
__
Edison.
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