This is the first time I'm configuring a L3 switch, so please excuse if this might be a stupid question for you:
I'm using 2 stacked Netgear FSM7328S switches. I've configured 3 different VLANs:
VLAN ID 10 192.168.1.0 / 24
VLAN ID 20 192.168.2.0 / 24
VLAN ID 30 192.168.3.0 / 24
Routing between these VLANs works fine.
To enable routing to an external network 10.1.2.0 / 24 and to the Internet I did configure port 1 as interface 192.168.5.254 / 24 on the switch. In addition I did configure a Netgear VPN router (FVX538) with LAN IPs 192.168.5.253 /24 and 10.1.2.254 / 24 and I did use a patch cable for connection between the VPN router and port 1 on the switch.
I've added the following default route on the FSM7328S stack:
Network address 0.0.0.0, SM 0.0.0.0, Interface: Port 1, Next Hop IP 192.168.5.253
I've added the following route on the VPN router FVX538:
Network address 192.168.0.0, SM 255.255.0.0, Interface: LAN, Gateway IP 192.168.5.254
When I connect a computer to VLAN 20 (IP: 192.168.2.50) it will be able to ping successfully addresses in the Internet as well in the 10.2.2.0 / 24 subnet. In this direction all seems to work fine. But I'm neither able to ping IP addresses in the VLANs nor the gateway IP 192.168.5.254 on the FSM7328S stack from computers in the 10.2.2.0 / 24 subnet.
If I ping to 192.168.2.254 for example (this is the routing interface in VLAN 20) from IP 10.1.2.51, then my computer in the VLAN will lose connection to the switch. After some minutes connection will be restored. I can restore connection manually if I unplug the cable of this computer on the FSM7328S and re-connect it into another switch port.
Does anybody know what might be the reason for this behaviour?
Thanks in advance!