IP Routing Tables

[Guest]

Hi,
Can someone offer any ideas on a routing scenario I have:

I have an XP Pro system that has 2 NICs and I need to route other PCs on the
LAN through this system. It is not the default gateway but is connected to an
Router that connects to another subnet. The registry entry EnableIPRouter
has its value set at 1. I have created a routing table and can ping the
network card on the second subnet but can not get any further than that. The
Local IP structure is 89.0.0.0/8 and I need to route to a network address of
172.0.0.0/28

The routing table for the PC with the two NICS is:
Active Routes:
Network Destination Netmask Gateway Interface Metric
0.0.0.0 0.0.0.0 89.1.1.6 89.1.0.5 1
89.0.0.0 255.0.0.0 89.1.0.5 89.1.0.5 20
89.1.0.5 255.255.255.255 127.0.0.1 127.0.0.1 20
89.255.255.255 255.255.255.255 89.1.0.5 89.1.0.5 20
127.0.0.0 255.0.0.0 127.0.0.1 127.0.0.1 1
172.22.2.240 255.255.255.240 172.22.2.242 172.22.2.242 20
172.22.2.242 255.255.255.255 127.0.0.1 127.0.0.1 20
172.22.250.3 255.255.255.255 172.22.2.241 172.22.2.242 1
172.22.255.255 255.255.255.255 172.22.2.242 172.22.2.242 20
224.0.0.0 240.0.0.0 89.1.0.5 89.1.0.5 20
224.0.0.0 240.0.0.0 172.22.2.242 172.22.2.242 20
255.255.255.255 255.255.255.255 89.1.0.5 89.1.0.5 1
255.255.255.255 255.255.255.255 172.22.2.242 172.22.2.242 1
Default Gateway: 89.1.1.6

The client is:
Active Routes:
Network Destination Netmask Gateway Interface Metric
0.0.0.0 0.0.0.0 89.1.1.6 89.1.0.141 30
89.0.0.0 255.0.0.0 89.1.0.141 89.1.0.141 30
89.1.0.141 255.255.255.255 127.0.0.1 127.0.0.1 30
89.255.255.255 255.255.255.255 89.1.0.141 89.1.0.141 30
127.0.0.0 255.0.0.0 127.0.0.1 127.0.0.1 1
172.22.2.240 255.255.255.240 89.1.0.5 89.1.0.141 20
172.22.2.242 255.255.255.255 89.1.0.5 89.1.0.141 20
172.22.250.3 255.255.255.255 89.1.0.5 89.1.0.141 1
172.22.250.255 255.255.255.255 89.1.0.5 89.1.0.141 20
172.22.255.255 255.255.255.255 89.1.0.5 89.1.0.141 20
224.0.0.0 240.0.0.0 89.1.0.141 89.1.0.141 30
255.255.255.255 255.255.255.255 89.1.0.141 89.1.0.141 1
Default Gateway: 89.1.1.6

Any ideas would be great.

BRGDS

Johan

 

[Doug Sherman [MVP]]

It looks like you have configured the 89.1.0.141 client with a correct
static route to the 172.0.0.0/28 network. However, if the 172.0.0.0/28
machines are not using the XP Pro machine as a default gateway, they need a
static route to the 89.0.0.0/8 network. IE. your ping request is probably
reaching a 172.0.0.0/28 machine but that machine does not know where to
send the echo response.

Doug Sherman
MCSE, MCSA, MCP+I, MVP

 

[Guest]

Thanks Doug, basically then the 172.0.0.0/28 NIC connects to a router that
connects to an ADSL line. The XP system with the two NICS can reply the PING
to the 89.0.0.0/8 network so the answer must be with the Router config then
as I can not get a ping reply from there.

Would you agree ?

BRGDS Johan

 

[Doug Sherman [MVP]]

It's the same issue. Neither the router nor the 172.0.0.0/28 machines know
where to send packets destined for the 89.0.0.0/8 network. If the
172.0.0.0/28 machines use the router's IP as a default gateway, then you can
configure a static route on the router - assuming that the router supports
static routes - consult your manual. You need a static route for the
89.0.0.0/8 network with a gateway of 172.22.2.242.

Doug Sherman
MCSE, MCSA, MCP+I, MVP

 

[Guest]

Cool, thanks for the help.

It's the same issue. Neither the router nor the 172.0.0.0/28 machines know
where to send packets destined for the 89.0.0.0/8 network. If the
172.0.0.0/28 machines use the router's IP as a default gateway, then you can
configure a static route on the router - assuming that the router supports
static routes - consult your manual. You need a static route for the
89.0.0.0/8 network with a gateway of 172.22.2.242.

Doug Sherman
MCSE, MCSA, MCP+I, MVP