Setting up a network with DSL modem and routers

[SteadySystems]

We seem to be experiencing some bandwidth issues within our LAN when sharing Verizon DSL Modem. The company is split into two companies extending over 400 feet of warehouse from Company A to Company B.

Hardware is as follows:

Company A:
Verizon DSL Modem
Windows 2000 Server
Switch (not sure of make and model, but its new)
Linksys EtherFast Cable/DSL Router (192.168.2.1)
20 users
Individual IP
Subnet mask 255.255.255.0
Individual Default Gateway

Company B:
Windows 2000 Server
Linksys EtherFast Cable/DSL Router (192.168.1.1)
Netgear 4 port hub
3 regular Hubs for user connectivity
20 users
Individual IP
Subnet mask 255.255.255.0
Individual Default Gateway

From the wall to DSL MODEM to a Switch in Company A, the cat5 cable is then plugged into the Patch Panel port that runs over to Company B. Cat5 cable out of the panel from Company B to the Netgear 4 port hub. Then a cable from the NetGear 4 port hub to the Linksys. Uplink from the Linksys to the first hub.

Linksys Router configured as such:

- Seperate static IP configured for the Linksys (192.168.1.1) router as provided by Verizon
- Subnetmask (255.255.255.0) configured for the Linksys (192.168.1.1) router as provided by Verizon
- Default Gateway configured for the Linksys (192.168.1.1) router as provided by Verizon
- DNS entries configured for the Linksys (192.168.1.1) router as provided by Verizon

The three hubs are daisy chained providing bandwidth to all the users.

When the DSL was setup for Company A, the connection was fast, 1.5mbps. When sharing the connection with company B, company B is fast (1.2mbps) and Company A is now bogged down to about 200kps.

Unplugging the cable from Company B allows fast internet access again for Company A.

What is the issue here? Is 400ft too long even with the routers and a switch?

Regards,
DDC

 

[SteadySystems]

I have a correction to make on first post. There is no seperate switch. Apparently Company A just has the Linksys router which is a 4 port switch and router. So both companies have a Linksys.

Thanks!

 

[SteadySystems]

Ok ok, let me revise this one last time:

We seem to be experiencing some bandwidth issues within our LAN when sharing Verizon DSL Modem. The company is split into two companies extending over 400 feet of warehouse from Company A to Company B.

Hardware is as follows:

Company A:
Verizon DSL Modem
Windows 2000 Server
Linksys EtherFast Cable/DSL Router 4 port Switch(192.168.2.1)
20 users
Individual IP
Subnet mask 255.255.255.0
Individual Default Gateway
DNS as provided by Verizon

Company B:
Windows 2000 Server
Linksys EtherFast Cable/DSL Router 4 port Switch(192.168.2.1)
Netgear 4 port hub
3 regular Hubs for user connectivity
20 users
Individual IP
Subnet mask 255.255.255.0
Individual Default Gateway
DNS as provided by Verizon

From the wall to DSL MODEM to a Switch in Company A, the cat5 cable is then plugged into the Patch Panel port that runs over to Company B. Cat5 cable out of the panel from Company B to the Linksys EtherFast Cable/DSL Router 4 port Switch(192.168.2.1) WAN port. Then a cat5 cable from the Uplink PORT on the Linksys to the first hub.

The three hubs are daisy chained providing bandwidth to all the users.

When the DSL was setup for Company A, the connection was fast, 1.5mbps. When sharing the connection with company B, company B is fast (1.2mbps) and Company A is now bogged down to about 200kps.

Unplugging the cable from Company B allows fast internet access again for Company A.

What is the issue here? Is 400ft too long even with the routers and a switch?

Regards,
DDC

 

[bcastner]

Some thoughts:

1. Is the cable length from A to B = 400 feet? If so, you are roughly 75' too long.

2. Company B alone introduces 5 hops to its traffic before it even hits the patch panel at Company A. There are 7 hops to reach the modem. The maximum should be 3.

 

[SteadySystems]

I believe the cable exceeds 300 ft. With two switches, don't they act as repeaters in a way?

And what do you mean 5 and 7 hops? How do you calculate that?

Regards,

 

[bcastner]

Modem
Switch
Patch Panel
Patch Panel
Linksys Router
Hub
Hub
Hub
End user on Company B Lan. Between seven and nine hops away from the modem.

The fact that you have a passive repeater after 300+ feet helps you little, you need the repeater somewhere in the middle of that run. You need to:

. Throw out all hubs
. Use a high density switch instead of cascading hubs and switches
. Add a repeater somewhere in that long cable run

This carefully done would put you into compliance with Fast Ethernet standards.