Quick ODR question

Mrock4

So, I have an 8 router topology, with multiple protocols being used and such. The simplest part of the lab is acting weird, and I just want to know why..

This part of the network consists of a hub router, with two stubs, running ODR over the links..simple enough. A loopback (2.2.2.2) is being used on one of the stub routers, and I am filtering that network via a distribute-list on the hub router, just to ensure it's filtering properly. The route for 2.2.2.2 is not showing up on the hub, so that's good. Both stub's have a default route to the hub, which is also right. The strange issue is, one stub router, can ping 2.2.2.2 using it's default route..but the hub can NOT ping 2.2.2.2.

To make it worse, the stub repeatedly pings at 60%, everytime. The hub has no route for the network anymore, since it is being filtered.

Something I'm missing here? I just was attempting to ping from one stub to the other, to ensure the distribute-list was working. It seems it is, since there's no route for that network I'm blocking, but...if traffic can still reach the network, it's obviously not right.

EdTheLad

Sounds strange, provide an output of all 3 routing&forwarding tables.

Mrock4

Will do..let me open those 3 routers up again. I began having some distribute-list/offset list fun while waiting on some brighter folks to offer insight

Well..I just started up the three routers..and it is working how I intended now...4 separate ping's resulting in 0% success rate...but either way..these are the tables for thoroughness:

R1:

172.16.0.0/16 is variably subnetted, 2 subnets, 2 masks
C 172.16.2.2/32 is directly connected, Serial1/0
C 172.16.2.0/30 is directly connected, Serial1/0
192.168.1.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.1.0/30 is directly connected, Serial2/0
C 192.168.1.2/32 is directly connected, Serial2/0



R2:

Gateway of last resort is 192.168.1.1 to network 0.0.0.0

2.0.0.0/32 is subnetted, 1 subnets
C 2.2.2.2 is directly connected, Loopback0
192.168.1.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.1.1/32 is directly connected, Serial1/0
C 192.168.1.0/30 is directly connected, Serial1/0
o* 0.0.0.0/0 [160/1] via 192.168.1.1, 00:00:06, Serial1/0


R3:

Gateway of last resort is 172.16.2.1 to network 0.0.0.0

172.16.0.0/16 is variably subnetted, 2 subnets, 2 masks
C 172.16.2.0/30 is directly connected, Serial1/0
C 172.16.2.1/32 is directly connected, Serial1/0
o* 0.0.0.0/0 [160/1] via 172.16.2.1, 00:00:17, Serial1/0


So, I guess it's OK but..why would it do that, any thoughts, or just a freak accident? Nothing has changed since I closed dynamips..just saved the config, made the post, and started them back up to copy the configs. Thanks again.

EdTheLad

My guess is your forwarding tables were screwed up, once you did a relaod the forwarding tables got repopulated with the correct routing info.

Mrock4

Hmm. Gotta love technology...I appreciate the input. I'll have to keep a closer eye next time.