2 routers, 4 pcs and wan...

[DarN]

I have a 3com 3C855 and a SMC7004VBR. The 3com is connected to the net, and the SMC daisy chained on it. I have one pc connected to the 3com and three to the SMC. All pcs have internet access, however the pcs on the SMC can see each other, but not the one on the 3com and vice versa. Will I somehow be able to remedy this? I need one big happy LAN on 2 routers!

I've searched the net extensively, and found lots of "VLAN", "segments" and "subnets". I was hoping someone here was a little more proficient in ze net jargons then I.

Couldn't seem to get this working either
edit: Well sorta working. I can access the machine on the 3com by pinging it, but not by name. I can't ping the other way though....

 

[Saem]

I'm not all that great at this so if I'm wrong, somebody who knows better will correct me.

Could you elaborate on the settings you have on your 3Com and SMC? Are you using DHCP, do both routers have DHCP enabled? Are all the comps using the same default gateway?

You should have one router handing out the internal IPs. All comps should have the same subnets, default gateway and so on. That should in effect have the second router act as a hub and nothing more.

 

[DarN]

The SMC have DHCP disabled, which makes it a switch from what I gather. The setup is like the one in the link I provided (or at least that's what I was aiming for). The 3com is in "normal mode".

Crappy schematic:

WAN-->3com-->SMC
        |     |
       pc1   pc2
              |
             pc3
              |
             pc4

 

[DarN]

As for subnets, I don't know. This is the current config:

WAN-->192.168.1.x_255.255.255.128-->192.168.1.x_255.255.255.128/192.168.0.x_255.255.255.0
                |                                               | 
      192.168.1.x_255.255.255.128                   192.168.0.x_255.255.255.0
                                                                | 
                                                    192.168.0.x_255.255.255.0
                                                                | 
                                                    192.168.0.x_255.255.255.0

Why would I be able to ping, say 192.168.1.4 from 192.168.0.3, but not the other way around? The 192.168.1.x range is visible to the SMC, but the 192.168.0.x range is not visible to the 3com???

 

[Althornin]

As for subnets, I don't know. This is the current config:

WAN-->192.168.1.x_255.255.255.128-->192.168.1.x_255.255.255.128/192.168.0.x_255.255.255.0
                |                                               | 
      192.168.1.x_255.255.255.128                   192.168.0.x_255.255.255.0
                                                                | 
                                                    192.168.0.x_255.255.255.0
                                                                | 
                                                    192.168.0.x_255.255.255.0

Why would I be able to ping, say 192.168.1.4 from 192.168.0.3, but not the other way around? The 192.168.1.x range is visible to the SMC, but the 192.168.0.x range is not visible to the 3com???

Because of how you have it set up.
Your host on the 3com will be attempting to send all packets routed to 192.168.0.x through its default gateway, which will be the 3com router, which is unaware of the existence of the SMC router and its seperate VLAN.

You should never be using two seperate subnets/network segments the way you are. Your SMC is acting as both a router and a DHCP server.
Disable its DHCP, and use it like a switch - dont plug an output of the 3com into the SMC's WAN port, plug it into one of its regular ports. This will result in all hosts being on the same segment/VLAN, and being able to route to each other.

 

[DarN]

Thankyou! Thankyou! Thankyou!

Already had the SMC as a switch, but I simply switched the ports, and it worked.
You're a life saver!