Redundancy
RM Web L3E
Release
6.0
07/2010
7.5
Spanning Tree
189
Note: The parameters Forward Delay and Max Age have the following
relationship:
Forward Delay ≥ (Max Age/2) + 1
If you enter values that contradict this relationship, the device then replaces
these values with the last valid values or the default value.
MRP
compatibility
Switches the MRP compatibility on/off.
MRP compatibility enables RSTP to be
used within an MRP-Ring and when
coupling RSTP segments to an MRP-
Ring. The prerequisite is that all devices in
the MRP-Ring must support MRP
compatibility.
If you combine RSTP with an MRP-Ring,
set the bridges in the MRP-Ring to a better
(numerically lower) RSTP bridge priority
than those in the connected RSTP
network. Thus you avoid a connection
interruption if connections in the MRP-
Ring become inoperable.
On,
Off
Off
BPDU Guard Switches the BPDU Guard function on/off.
If BPDU Guard is switched on, the device
automatically activates the function for
edge ports (with the setting “Admin Edge
Port” true).
When such a port receives any STP-
BPDU, the device sets the port status
“BPDU Guard Effect” to true and the
transmission status of the port to
discarding(see table 91).
Thus the device protects your network at
terminal device ports from attacks with
STP-BPDUs that try to change the
topology.
On,
Off
Off
Parameter Meaning Possible Values Default Setting
Table 81: Global Spanning Tree settings, local bridge parameters
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