Multiple Vlans with same subnet

[zalvastwel]

Hi guys,

I know the basics of Procurve switches, but i have a challenge on my work and just can't find the right answer on this forum or google.

Our network guys created a couple years ago two different networks. A production network (Default Vlan-1) and a acceptation network (Vlan-3). Both networks have the same ip scope and subnet (10.31.0.0/16). The only thing is that Vlan-3 is created on a shadow network, physically  seperated from Vlan-1 production network.

Now is the challenge that i have to create an untagged network port for a computer on a production switch with Vlan-3 and have to create an uplink between the shadow and production switch.

When i do this in my test environment, the production switch goes down due to excessive broadcast.

All the switches are Procurve 2530 series. As extra explanation i created a network scheme of it.

Is it possible with these switches or do i need Layer 3 switches?

Thanks in advance!

P.S. This thread has been moved from  Switches, Hubs, Modems (Legacy ITRC forum) to ProCurve / ProVision-Based. -HP Forum Moderator

[Pete W]

From what I've read, what you want should be perfectly achievable with the switches you have, as all you seem to be doing is transiting a L2 network through a "production" switch.

I would reccomend the use of the command:

  show vlan port XX detail

This will help you to ensure that you do not have the tagging incorrectly configured on the uplink ports. It may be woth verifying that you have spanning-tree configured on all your switches as well.

Let me know how it goes.

Regards,

Pete