Layer 2 Switch with an ADSL Modem

November 19, 2011 at 23:56:55
Specs: Windows Vista
Hi All

Heres the problem I have. A Layer 2 switch with IP Address (Vlan0), subnet is physically connected to ADSL Router with IP address (which is also the gateway address for the switch).

The problem I have is that all the devices connected to the switch can intercommunicate but are unable to communicate with devices connected to the Router. I guess this may be something to do with how the Vlan is configured on ADSL router?

Switch AT-8000 GS
Router Dynalink 1025 (connects to internet)

Any help is much appreciated.

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November 20, 2011 at 18:32:37
Yeah it sounds like it could be the vlan and your Dynalink 1025. I had a look at the specs sheet for the Dynalink and it doesnt support any vlan protocols. That would be why devices connected to the router are unable to communicate with devices connected to the switch.

Take your vlan config off the switch and then it should work. If you need to vlan on your network then you need to upgrade your adsl router to one that supports vlan protocols.

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November 21, 2011 at 07:39:26
Is that router even VLAN capable?

In a typical, multiple VLAN configuration, one interconnects network appliances (ie: routers/switches) using trunking on uplink ports.

Are you using more than one VLAN?

If not, reset your switch to factory defaults and start over. I suspect if you do so, you'll see VLAN 1 is the default VLAN and it will be applied to all ports on the switch. Then all you would need to do is plug a connecting network cable from router to switch and clients attached to the switch should have internet connectivity as well as LAN connectivity.

I don't know why you have VLAN 0 or where that came from but that might be the issue. At least, I've never seen VLAN 0 in use on any switch in any network I've ever worked on.

It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.

***William Henley***

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November 21, 2011 at 08:03:03
simple solution: don't connect any devices to the router but only the switch to the router. All devices connect to the switch.

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