Hirschmann RS20 User Manual page 24

Ring Redundancy
The displays in the "Information" frame mean
– "Redundancy existing": One of the lines affected by the function may
be interrupted, with the redundant line then taking over the function
of the interrupted line.
– "Configuration failure": The function is incorrectly configured or the
cable connections at the ring ports are improperly configured (e.g.,
not plugged into the ring ports).
The "VLAN" frame enables you to assign the MRP-Ring to a VLAN:
 If VLANs are configured, you make the following selections in the
"VLAN" frame:
– VLAN ID 0, if the MRP-Ring configuration is not to be assigned to a VLAN, as in
this example.
Select VLAN ID 1 and VLAN membership U (Untagged) in the static VLAN table
for the ring ports.
– A VLAN ID > 0, if the MRP-Ring configuration is to be assigned to this VLAN.
For all devices in this MRP-Ring, enter this VLAN ID in the MRP-Ring
configuration, and then choose this VLAN ID and the VLAN membership Tagged
(T) in the static VLAN table for all ring ports in this MRP-Ring.
Note: If you want to use the RSTP
redundancy protocol in an MRP-Ring, switch on the MRP compatibility on all
devices in the MRP-Ring in the Rapid Spanning Tree:Global dialog as
the RSTP (Spanning-Tree) and ring redundancy affect each other.
If this is not possible, perhaps because individual devices do not support the
MRP compatibility, you deactivate RSTP at the ports connected to the MRP-
Ring.
Note: When you are configuring an MRP-Ring using the Command Line
Interface, you define an additional parameter. When configured using CLI, an
MRP-Ring is addressed via its MRP domain ID. The MRP domain ID is a
sequence of 16 number blocks (8-bit values). Use the default domain of 255
255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 for the MRP
domain ID.
This default domain is also used internally for a configuration via the Web-
based interface.
Configure all the devices within an MRP-Ring with the same MRP domain ID.
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2.2 Example of a MRP-Ring
(see on page 57 "Spanning Tree")
UM Redundancy Configuration L2E
Release 7.1 12/2011