ospf routing problems

[efuenteso]

hi every one, i got a issue trying to setting up a ospf config betwen 2 summit450 extreme

network switches. here is the topology...

----------
| NAT | { }
| |--------------{To Internet}
| | { }
----------
|192.168.150.151
|
|192.168.150.1
---------- ---------
| router |192.168.150.1 192.168.150.20| server |
| A |---------------------------------| tftp |
| | | dhcp |
---------- ---------
|192.168.204.2
|
|192.168.204.1
---------- ----------
| router |172.18.2.1 172.18.2.2| router |
| B |---------------------------------| Y |
| | | |
---------- ----------
|172.18.6.1/30
|
|172.18.6.2/30
----------
| router |
| X |
| |
----------

when i try to reach 172.18.6.1/30 (even if this interface is enable as a loopback) from

192.168.150.20 the traceroute shows as follows:


traceroute to 172.18.6.1 (172.18.6.1), 30 hops max, 40 byte packets
1 192.168.150.1 (192.168.150.1) 1.123 ms 0.533 ms 0.323 ms
2 192.168.150.151 (192.168.150.151) 0.320 ms 0.202 ms 0.399 ms
3 lost to internet...

the traceroute to 172.18.2.1 goes directly to the interfase (just like a reference)

the routing table for router b has these routes:

Ori Destination Gateway Mtr Flags VLAN Duration
#s Default Route 192.168.150.151 1 UG---S-um--
#or 172.18.6.0/30 192.168.204.1 8 UG-D---um--
#or 172.18.2.0/30 192.168.204.1 8 UG-D---um--

and the routing table for router a has these ones:

Ori Destination Gateway Mtr Flags VLAN Duration
#o1 Default Route 192.168.204.2 5 UG-D---um--
#d 172.18.6.0/30 172.18.6.1 1 U------um--
#d 172.18.2.0/30 172.18.2.1 1 U------um--


my question is why the traceroute to 172.18.6.1/30 goes to the internet defaul route when is suposed it has to take the the nexthop 192.168.204.1???


it is someting related with the metric? i been around this problem some extra days.. so any tip would be helpfull

thanks.