Siemens RUGGEDCOM ROS User Manual page 246

Chapter 6
Troubleshooting
Problem
VLANs are not needed on the network. Can
they be turned off?
Two VLANs were created and a number of
ports were made members of them. Now
some of the devices in one VLAN need
to send messages to devices in the other
VLAN.
On a network of 30 switches, management
traffic needs to be restricted to a separate
domain. What is the best method for doing
this while staying in contact with these
switches?
232
Solution
Yes. Simply leave all ports set to type edge and leave the native VLAN set to 1. This is the
default configuration for the switch.
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), use a router. The router will treat each VLAN as a separate interface, which will
have its own associated IP address space.
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. Contact with each
individual switch will be lost immediately as they are being configured, but it should be
possible re-establish communication 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.
RUGGEDCOM ROS
User Guide
VLANs