VLANs

6.4 Troubleshooting

Problem One

I don’t need VLANs at all. How do I turn them off?

Simply leave all ports set to type “Edge” and leave the native VLAN set to 1. This is the default configuration for the switch.

Problem Two

I have added two VLANs 2 and 3. I made a number of ports members of these VLANS. Now I need some of the devices in one VLAN send messages to some devices in the other VLAN.

If the devices need to communicate at the physical address layer, they must be members of the same VLAN. If they can communicate in a layer 3 fashion (i.e. using a protocol such as IP or IPX) you can use a router. The router will treat each VLAN as a separate interface, which will have its own associated IP address space.

Problem Three

I have a network of thirty switches for which I wish to restrict management traffic to a separate domain. What is the best way of doing this while still staying in contact with these switches?

At the switch where the management station is located, configure a port to use the new management VLAN as its native VLAN. Configure a host computer to act as a temporary management station.

At each switch, configure the management VLAN to the new value. As each switch is configured you will immediately lose contact with it, but should be able to re-establish communications from the temporary management station. After all switches have been taken to the new management VLAN, configure the ports of all attached management devices to use the new VLAN.

Note: Establishing a management domain is often accompanied with the establishment of an IP subnet specifically for the managed devices.

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ROS™ v3.5

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RuggedCom RS400 manual Don’t need VLANs at all. How do I turn them off?