Pilz PSSnet SHL 8T MRP - Manual (Page 73)

Rapid Spanning Tree
PSSnet SHL - Redundancy Configuration
Pilz GmbH & Co. KG, Felix- Wankel Str. 2, 73760 Ostfildern
4.6 The Rapid Spanning Tree
Protocol
73
Parameter Meaning Value range Default setting
Priority The priority and the MAC address go
together to make up the bridge
identification. 0 < n*4,096 < 61,440 32.768
Hello Time The left column shows the value cur-
rently being used by the root bridge.
The device periodically receives con-
figuration frames (Hello frames) from
the root bridge. The Hello Time
shows the time between two succes-
sive configuration frames sent by the
root bridge. If you configure the cur-
rent device as the root bridge, the
other devices in the entire network
will assume the value in the right col-
umn. 1 - 2 2
Forward Delay The left column shows the value cur-
rently being used by the root bridge.
The predecessor protocol STP used
the parameter to control (delay) the
transition time between the states
„disabled“, „blocking“, „learning“,
?„forwarding“. Since the introduction
of RSTP, this parameter has only
secondary relevance because state
transitions are negotiated between
RSTP bridges without a given time
delay. If you configure the current de-
vice as the root bridge, the other de-
vices in the entire network will
assume the value in the right column.
4 - 30 (see a:) 30
Max Age The left column shows the value cur-
rently being used by the root Switch.
Contrary to the past (STP) meaning,
Max Age now (for RSTP) denotes the
maximum permissible branch length
(number of devices to the root
bridge). If you configure the current
device as the root bridge, the other
devices in the entire network will as-
sume the value in the right column. 6 - 40 (see a:) 6
Table 12: Global RSTP settings