Hirschmann OCTOPUS OS20 Reference Manual

Redundancy
96
6.2 Rapid Spanning Tree
RM Web L2B
Release 5.3 05/2012
Priority Sets the local bridge priority.
The bridge priority and its own MAC
address make up this separate Bridge
ID. The device with the best (numerically
lowest) priority assumes the role of the
root bridge. Define the root device by
assigning the device the best priority in the
Bridge ID among all the devices in the
network.
Enter the value as a multiple of 4,096.
0 ≤ n*4096 ≤
61440
32,768
Hello Time Sets the Hello Time.
The local Hello Time is the time in
seconds between the sending of two
configuration messages (Hello packets).
If the local device has the root function, the
other devices in the entire network take
over this value. Otherwise the local device
uses the value of the root bridge in the
“Root” column on the right.
1 - 2 2
Forward Delay Sets the Forward Delay parameter.
In the previous STP protocol, the Forward
Delay parameter was used to delay the
status change between the statuses
disabled, discarding, learning,
forwarding. Since the introduction of
RSTP, this parameter has a subordinate
role, because the RSTP bridges negotiate
the status change without any specified
delay.
If the local device is the root, the other
devices in the entire network take over this
value. Otherwise the local device uses the
value of the root bridge in the “Root”
column on the right.
4-30s
See the note
following this
table.
15 s
Max Age Sets the Max Age parameter.
In the previous STP protocol, the Max Age
parameter was used to specify the validity
of STP BPDUs in seconds. For RSTP,
Max Age signifies the maximum
permissible branch length (number of
devices to the root bridge).
If the local device is the root, the other
devices in the entire network take over this
value. Otherwise the local device uses the
value of the root bridge in the “Root”
column on the right.
6-40s
See the note
following this
table.
20 s
Parameter Meaning Possible
Values
Default Setting
Table 25: Global Spanning Tree settings, basic function

Hirschmann OCTOPUS OS20 Specifications

General

Brand	Hirschmann
Model	OCTOPUS OS20
Category	Network Router
Language	English