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Forum Discussion
Routing with a VLANS - changing subnets
I inherited a network on a weird internal subnet (100.100.100.x) the gateway (issued by Windows DHCP server) for clients is a firewall and the switch isn't currently used for routing.
I want to achive two things, one setup new subnets 10.12.1.x (clients on vlan 121) 10.12.2.x (production system on vlan 122) and 10.12.3.x (servers on vlan 123) Once I have got one of the subnet andit's vlan up and working with the switch being issued a 10.12.1.254 address and forwards to my firewall (watchguard) which I've also given it's own vlan 99 and subnet an address on the 10.12.99.1 (switch is 10.12.99.254). I can get on the internet and what not.
The second thing I'm trying to do is get the 100.100.100.x subnet co-existing with the 10.12.1.x network so I can start changing pcs and servers over to the 10.12.x.x networks.
Currently the PC I've got set up, I've put on the 100.100.100.1 (default setup is vlan1) and the switch is 100.100.100.5 and the firewall is 100.100.100.254. If I configure my PC to be IP 100.100.100.1/24 and gateway of 100.100.100.254. Network and internet access are fine, However if I cahnge the gateway to be my switch, I can't access local servers. I want a way to tell the switch to route vlan 121 to vlan 1 but when I try I'm told by the switch I'm not allowed to set up a route on the management vlan.
Can anyone help me resolve my routing issue? I want the switch to do all the routing in the future and remove the 100.100.100.x subnet.
7 Replies
Here is a quick network diagram which may help visualise this better.
Hi bluesound,
Welcome to our community!
If you wanted to have the 2 VLANs to communicate with each other, then you might need to enable routing on those VLANs. As they are working on 2 different subnets. May I know the model number of your switch? You can also enable routing on your firewall.
Regards,
Hi there,
I was on holiday for the last week, so I've just got back today, My switch is a NETGEAR GS752TPSB
When I try to tell the netgear to route VLAN 121 to VLAN 1 I get a message.... that I'm not allowed to set up a route on the management vlan. So I tried to change the management VLAN to 100, and set all ports to be untagged on vlan 100 and now I can't manage my switchthrought http OR through the SmartCenter I've a feeling I should have set it to tag vlan 100 rather than untagged, or configured a port with a PVID of 100.I don't suppose you can suggest a fix to this other than a factory reset and restoring the latest backup of my settings.
Thanks
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