I must be losing it. I'm setting up a 1721 router internally on my nework. I've configured both interfaces and both are up up. I've configured a default route and a name server but I can't seem to get it to route. can anyone see anything obvious?
Current configuration : 706 bytes
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
enable secret 5 $1$jynz$4oGBbyDEp2dk17MPN3i3t/
enable password *******
mmi polling-interval 60
no mmi auto-configure
no mmi pvc
mmi snmp-timeout 180
no aaa new-model
ip name-server 192.168.200.200
ip address 192.168.200.236 255.255.255.0
ip address 172.16.0.254 255.255.0.0
ip route 0.0.0.0 0.0.0.0 192.168.200.1
no ip http server
line con 0
line aux 0
line vty 0 4
The IP Route 172.16.0.0 255.255.0.0 fastethernet0
And IP Route 192.168.200.0 255.255.255.0 ethernet0
commands didn't work. I still can't ping anything on the 192 network except 192.168.200.236.
What is the default-gateway set to on all devices on the 192.168.200.x network ?
If you can't ping the 192.168.200.1 address then check that device to see if it has a route for the 172.16.0.0 pointing back to 192.168.200.236.
It sounds like all the 192.168.200.x devices are using a default-gateway that is not your router ie. probably the 192.168.200.1 device and this is missing a route.
Note that if you have no control over the 192.168.200.1 device then you can NAT your 172.16.x.x addresses to 192.168.200.236 so that the 192.168.200.1 device would know where to send return packets but it would be easier to configure a route on the 192.168.200.1 device if you have access eg.
ip route 172.16.0.0 255.255.0.0 192.168.200.236