IP Networking

hi,

below is the situation:

my server is in 128.10.200.xxx network.

i have a solaris computer running in a subnet. this computer got 2 nic card.
1 is 172.18.198.xxx , another 1 is 10.100.xxx.11
there is a machine stick with this computer, ip is 10.100.xxx.12
so, 10.100.xxx.11 and 10.100.xxx.12 is a internal network inside this computer.

128.10.200 gateway is 128.10.19.1
172.18.198 gateway is 172.18.19.1
128.10.200.xxx and 172.18.198.xxx able to communicate each other.
i configured in the switch.

my purpose is let 128.10.200 and 10.100 to communicate each other.

10.100 able to trace the server.
but when i tried to trace 10.100 network from the server it seems not work.

so tried in server:
route add 10.100.xxx.11 172.18.198.xxx
it shows network unreachable.

i'm very confusing now. it seems like must route to somewhere else then only get into 10.100 network.

i'm don't know what to do now.
need to configure in the switch or add some route in server?
need to add one machine in 172.18 or 128.10 network to handle some route?

no idea at all.

please help.

thanks

Have you checked that forwarding is enabled? It's been a while since I last used Solaris (on my old Sun IPX), but I's hazard a guess that it's a similar process to Linux or BSD:

There's (hopefully) a file called 'ip_forward' in /proc/sys/net/ipv4 or somewhere like that.

If this file is not present, or contains '0', the kernel will not forward packets between interfaces. If so, 'echo 1 > ip_forward' should sort it out.

I think I need to make it simple.

The server is 128.10.200.99 ; gateway is 128.10.19.1

The machine is 172.18.198.104 ; gateway is 172.18.19.1
Inside machine got 10.100.104.11 and 10.100.104.12

Can I add a route in server like below:
"route add 10.100.104.11 172.18.198.104"

it shows network unreachable since 172.18 is not a part of 128.10 network.
i need this kind of route.

all ip netmask 255.255.0.0

hello,

if your 10.100.a.b behind somekind of NAT - you need to pass the traffic through a static port translation so your server can reach the other end.
a static route maybe wont do the trick.

cheers.