Routing and WAN connections
460
11.17
The rapid spanning tree protocol
BAT54-Rail/F..
Release
7.54
06/08
Note: Modifying any of these three time values is only recommended for
those with exact knowledge of the Spanning Tree protocol. An adjustment
can be useful in order to optimize reaction times after topology changes
or to achieve stable performance in networks with many 'bridge hops'.
D Transmit-Hold-Count
Number of BPDUs which can be transmitted by RSTP before a one sec-
ond pause commences.
D Default: 6
Note: When using classical STP the transmit-hold count has no effect.
U Port Table
The port table can be used to set the following values separately for all avail-
able ports (LAN, wireless LAN, point-to-point connections).
D Mark as edge port
Marks the port as an edge port which is not connected to any further
bridges but to workstations or servers only. Edge ports switch immediately
into the forwarding state.
D Default: Off
Note: Edge ports continue to be monitored by RSTP. If a port of this type re-
ceives BPDUs, then its status as an edge port is removed.
D Priority
Defines the priority of the port. In the case of multiple network paths with
identical path costs, the priority value decides which port is used. If priority
values are identical then the port to be taken is the first in the list.
D Values: 0 to 255, where a higher value means a lower priority.
D Default: 128
Note: So as to maintain compatibility with RSTP, this value may only be ad-
justed in steps of 16 owing to the fact that RSTP uses only the upper 4-
bits of this 16-bit value.
D Path-Cost-Override
This parameter controls the priority of paths with equal value. The value
set here is used to make the selection instead of the computed path costs.
D Particular values: 0 switches path-cost override off.
D Default: 0
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