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Setting Up 2 VLANs on 2 Netgear GSM7224

Alrighty - I cannot get new L2 managed switches to work like the old ones did.  I am replacing 1 Cisco Catalyst 3500XL switch and 1 Cisco Catalyst 2900 Switch with 2 Netgear GSM7224 switches - the theory is that I am upping my network to gigabit speed....

The current setup is as follows: I have 2 VLANs setup, VLAN 1 is for the 192.168.100.x subnet and VLAN 2 is for the 192.168.200.x subnet.  My servers each have 2 NICs, on for each subnet... The 2 existing switches each have 12 ports on VLAN 1, and 12 ports on VLAN 2.  The switches are on opposite sides of my building (school).  There is a fiber connection between the swtiches (one on each VLAN) to connect the far switch to the main switch near my servers.

As near as I can tell, the two VLANs do not communicate with each other, packets from one VLAN are router via my server to the other VLAN (e.g. PC on VLAN 1 can print to printer on VLAN 2 because of routing server).

Now, on my new hardware, I set them up exactly the same as each other.  Two VLANs (1 and 2), 12 ports on each to each VLAN (just as the old switches).  This setup is done as correctly as I understand, I am not an expert on this matter.

Here is the problem - at the remote site (away from servers): If I connect the PC's to VLAN 2 (200 subnet) they behave perfectly.  They get the proper IP from DHCP, connect to all servers and can route to the other network (100 subnet) - However, when I connect the link for VLAN 1 (100 subnet) everything that is supposed to be on VLAN 2 loses all communication but VLAN 1 operates smoothly.  When I disconnect the link to VLAN 1, everything returns to normal.

For example - I am using a PC that is supposed to be on VLAN 2 (200 subnet)... I ping my DHCP server ( and receive replies - as soon as I connect the link to VLAN 1, the ping times out - as soon as I DISconnect VLAN 1, the ping returns to normal (receiving replies).

I think I have some kind of configuration goofed up... I am using the web GUI to do all this setup.

Its worth noting, that the Cisco switches were setup by someone else, and I cannot access their configuration at all - when I try to console in, my HyperTerminal gives me absolutely no display of the server so I cannot try the password recovery option I've found on Cisco's site.

Any an all help will be great appreciated.  Thank you.
Switches / HubsNetworking

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8/22/2022 - Mon

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Thanks for the comment, but I think I may have not made myself clear (not uncommon)...

First off, I don't have a cisco switch currently in use (I'm replacing Cisco switches).  And I only have 2 24 port switches, so I'm a little confused by your directions.

Second, I don't understand what you mean by looping my network.  As far as I can tell, I'm supposed to have two completely seperate networks (VLAN 1, 192.168.100.x and VLAN 2, 192.168.200.x).  These two networks are connected by my server acting as a router.  All of my ports should be untagged (not trunked) so they remain seperate from each other.  There is never a reason for packets from VLAN 1 to go to VLAN 2 without passing through the router.

In an effort to make myself a little more clear - I've created a little document that hopefully illustrates what I'm trying to do.

hm-hm, my mistake, I suppose

can you describe your problem with vlans now, please?
what are you trying to ping, etc
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William Peck

I'm trying to get two VLANs (1 and 2) on one switch.  The two VLAN's should not be able to talk to each other at all.

I'm then trying to a second switch to mirror the configuration.

I'll then connect VLAN 1 on the first switch to VLAN 1 on the second switch with a cable... same for VLAN 2.

Hope this makes sense.

ok, so if you need further assistance, please, post here!

I aslo foresee, that you can have potential problems with your scenario, because it is uncommon.
As I have said before, common scenario is to use 1 cable between two switches with both vlans within.
It is secure and vlans will be unable to see each other
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