Log In

Come Join Us!

Are you a
Computer / IT professional?
Join Tek-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Tek-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

3Com Baseline 2426 VLANS

3Com Baseline 2426 VLANS

3Com Baseline 2426 VLANS

I am trying to setup a 3Com Baseline 2426 switch for an office that rents out office space. They have a DrayTek router for the internet connection that is connected into port 26 and a shared printer in port 25.
I need to create a separate VLAN for each office so PC's in each office can only see each other, the shared printer and have access to the shared internet connection. The DrayTek is setup to assign IP addresses using DHCP.
I have created the following on the switch
VLAN 2 – Tagged Ports 1,2,25,26
VLAN 3 – Tagged Ports 3,4,25,26
The problem I have is that all devices can see each other, do I need to set the ports that the PC's are connected to as untagged VLAN members and leave the shared printer and internet connection ports as tagged in each VLAN? I think the default VLAN 1 may be causing the issue but not sure.
Any help is greatly appreciated.
Thank you

RE: 3Com Baseline 2426 VLANS

The Baseline 2426 switch is Layer 2 only! For routing between VLANs you must use Layer 3 devices. If your DrayTek has full Layer 3 routing capabilities, than you can configure a routing table to accomplish this, by creating a route for each VLAN to the Internet and shared printer.

I am not familiar with DrayTek. You will need to read the documentation for your router. In the event that the DrayTek won't fill your needs, you may need to replace it with something else, like a Fortigate or Juniper Networks router.


RE: 3Com Baseline 2426 VLANS

If the Draytek supports it, you create each VLAN on the Draytek and configure the default GW for each subnet on each VLAN on the Draytek.
You then have to configure the ethernet port on the Draytek to be a .1q trunk, with all VLANs tagged, and then patch that to a port on your 3COM which is configured exactly the same.
Then, you assign each port on the 3COM as untagged in the appropriate VLAN for the device you are patching to that port.
It's not immediately clear why you need VLANs when your entire network consists of one 24-port switch.

RE: 3Com Baseline 2426 VLANS

It is very clear why he wants VLANs. If Vincewhirlwind  read the beginning of the post, you would see he wants his tenants to have separate LANs, since the landlord is providing Internet service with the office rentals. Hence VLANS, to serve their needs!


RE: 3Com Baseline 2426 VLANS

Thank you both for your help. If all devices were on the same subnet as the Draytek and the printer would this remove the need to use layer 3 to route between the VLANS? So make the Draytek and printer ports members of all VLANS.

RE: 3Com Baseline 2426 VLANS

Unfortunately, VLANs don't work that way. A VLAN is a LAN unto itself, like a private circuit or path (virtual). It may share the same physical path and bandwidth, but is isolated to itself and the ports that are assigned to the specific VLAN(s). To get a better idea about this functionality, you might want to read the manual on the Baseline 2426 switch, especially chapters 7 and 8. If you don't have the CD that came with the switch, you can download the documentation from the 3COM website. If that explanation is lacking, you can use a search engine to find info about VLANs on the web.

With the requirements you expressed, the only way to communicate between VLANs and the Internet is with a Layer 3 device(s) in order to maintain the separateness . Sharing the network printer among VLANs is a special case, and would require special routing for all the VLANs in order to work.


RE: 3Com Baseline 2426 VLANS

Thanks for all your help Jim, i'll have a look through the documentation.  

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Tek-Tips Forums free from inappropriate posts.
The Tek-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Tek-Tips forums is a member-only feature.

Click Here to join Tek-Tips and talk with other members! Already a Member? Login

Close Box

Join Tek-Tips® Today!

Join your peers on the Internet's largest technical computer professional community.
It's easy to join and it's free.

Here's Why Members Love Tek-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close