From: Jeff Nelson (jnelson@rackspace.com)
Date: Mon Dec 29 2003 - 01:40:19 GMT-3
I've been going throught the netmaster sample and I came across an issue with the route reflection of R3.
It short, it does seem to be passing along the 192.168 routes to R4.
no sync is configured on R4 (it is receiveing the 3.0.0.0 route, but I can see from a show blahblah advertised routes that R3 is not re-advertising the 192.168 range)
bgp is being redistributed into OSPF on R2
There does not seem to be a valid reason, but I'm sure I'm missing ?something? No time to waste time, but this kind of stuff should be cake.
Here is the bgp configs from each router:
r4:
router bgp 64600
no synchronization
bgp log-neighbor-changes
neighbor 172.16.34.3 remote-as 64600
r3:
router bgp 64600
bgp log-neighbor-changes
network 3.0.0.0
neighbor 172.16.34.4 remote-as 64600
neighbor 172.16.34.4 route-reflector-client
neighbor 172.16.123.2 remote-as 64600
neighbor 172.16.123.2 route-reflector-client
r2:
router bgp 64600
bgp log-neighbor-changes
neighbor 172.16.123.1 remote-as 100
neighbor 172.16.123.3 remote-as 64600
r1
router bgp 100
no synchronization
bgp log-neighbor-changes
aggregate-address 192.168.100.0 255.255.252.0 as-set summary-only
neighbor 172.16.17.7 remote-as 700
neighbor 172.16.17.7 remove-private-AS
neighbor 172.16.123.2 remote-as 64600
no auto-summary
This is the routing table on R3:
O E2 192.168.104.0/24 [110/1] via 172.16.123.1, 00:06:27, Serial0/1
3.0.0.0/24 is subnetted, 1 subnets
C 3.3.3.0 is directly connected, Loopback31
O E2 192.168.105.0/24 [110/1] via 172.16.123.1, 00:06:27, Serial0/1
172.16.0.0/16 is variably subnetted, 12 subnets, 4 masks
O IA 172.16.50.0/24 [110/129] via 172.16.123.2, 00:06:27, Serial0/1
D EX 172.16.40.0/23 [170/156160] via 172.16.34.4, 02:29:34, FastEthernet0/0
C 172.16.34.0/24 is directly connected, FastEthernet0/0
C 172.16.28.0/22 is directly connected, Loopback30
O IA 172.16.25.0/24 [110/128] via 172.16.123.2, 00:06:28, Serial0/1
O IA 172.16.20.0/24 [110/65] via 172.16.123.2, 00:06:28, Serial0/1
O E2 172.16.17.0/24 [110/100] via 172.16.123.1, 00:06:28, Serial0/1
O E2 172.16.2.0/24 [110/20] via 172.16.123.2, 00:06:28, Serial0/1
C 172.16.123.0/24 is directly connected, Serial0/1
O E2 172.16.88.0/24 [110/100] via 172.16.123.1, 00:06:28, Serial0/1
O E2 172.16.80.0/27 [110/100] via 172.16.123.1, 00:06:28, Serial0/1
O E2 172.16.77.0/24 [110/100] via 172.16.123.1, 00:06:28, Serial0/1
O*E2 0.0.0.0/0 [110/1] via 172.16.123.2, 00:06:28, Serial0/1
O E2 192.168.100.0/22 [110/1] via 172.16.123.1, 00:06:28, Serial0/1
Here is the bgp table from R3 (note type is IGP and not incomplete because I was playing with how it was injected to see if it would propagate--of course it didn't)
Network Next Hop Metric LocPrf Weight Path
*> 3.0.0.0 0.0.0.0 0 32768 i
* i192.168.100.0/22 172.16.123.1 100 0 100 700 i
* i192.168.104.0 172.16.123.1 100 0 100 700 i
* i192.168.105.0 172.16.123.1 100 0 100 700 i
Would appreciate a tip from someone that's gone through this scenario.
Thanks,
Jeff
This archive was generated by hypermail 2.1.4 : Sat Jan 03 2004 - 08:25:46 GMT-3