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Forum Discussion
GC728XP Cannot Get DHCP or VLANs to Work
Hi all, I have two of these GC728XP switches (Firmware 1.0.5.35) that were just being used as basic switches for VOIP phones without any configuration! My setup is Comcast Xfinity modem then ...
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The IP address of the GC728XP must be on subnet that is different from the subnet of the VLANs. It is because if you assign a VLAN Interface IP Address that is on the same subnet as with the IP Address of the switch, it will result to an error that says: "IP Address/Netmask entered conflicts with the configured IP Address/Netmask of the service port or a router interface".
With regard to Inter-VLAN Routing, let me share the articles below and these might help as reference guides:
VLAN Routing on Smart Switches
VLAN Routing on a NETGEAR Smart Switch
How do I set up one or more VLANs between a NETGEAR ProSAFE firewall and a smart switch?
Regards,
DaneA
NETGEAR Community Team
Thanks DaneA for the response. I am still getting nowhere!
So attached is the diagram. Prior to trying VLANs computer A, B, C all got issued IP addresses and work to each other and had access to the web with no configuration.
I do not want ANY inter VLAN connectivity, I just want computer A & B to be on a VLAN for privacy and have access to the web which they do not. In fact B can ping A, but A cannot ping B. A works fine (no VLAN).
I have setup the VLAN as per knowledge base articles. VLAN 106 is on a completely different subnet as per your advice - what am I missing? Is it a route I need?
Many thanks in advance.
Daz
From the network diagram you have attached, it seems that your modem is a modem-router combo. About your goal to have the devices connected to VLAN 106 to have internet access, VLAN 106 needs to have its own DHCP server. Is your modem-router VLAN capable wherein it has the option to create another DHCP server for VLANs?
As reference guide, kindly check this old article below that shows how VLANs are configured on both firewall router and a NETGEAR Smart Switch (like the GC728XP) that are directly connected to each other:
How do I set up one or more VLANs between a NETGEAR ProSAFE firewall and a smart switch?
Regards,DaneA
NETGEAR Community Team
Thank you again DaneA! I setup a network identical to the one in your 'VLAN Routing on Smart Switches' guide.
It's a crappy modem-combo that has a DHCP server but that isn't an issue - static IP addresses are fine. One of the steps in the guide is to create a default route on the switch to 192.168.1.1. After doing this I get the alert "The route will not take effect until a routing interface belonging to the same subnet as the next hop is created and activated". Problem is there is no router to do that.
I have added a SonicWall TZ300 Firewall between the switch and the internet which does DHCP and can have static routes so I should be able to set the static route there?
Daz
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