Cabletron Systems SmartSTACK STS16-20RM Installation And User Manual page 114

100
STP Priority
Priority associated with the CRF. The CRF with the lowest priority value has the
highest priority and will forward the spanning tree frames. The default is 128. The
possible range is 0 through 255 (decimal).
STP Cost
Cost associated with the internal CRF-to-BRF link. The spanning tree protocol uses
path costs to determine the least expensive path to the root.
STP Participation (CRF-to-Ports)
Whether the ports in this CRF participates in the spanning tree protocol and, if so,
the protocol to be used. Possible values are No, IEEE and Cisco. The default is No.
The recommended protocol is IEEE, but if the CRF contains more than one port and
the port(s) are connected to SRT bridges running the IEEE Spanning Tree Protocol
(using the IEEE group address), then the Cisco protocol should be used.
•
If STP Participation is set to No, then all ports belonging to this CRF will be
set to forwarding mode. You can then override this by blocking a particular
port.
•
If STP Participation is set to IEEE or Cisco, then the selected protocol will
be used to determine the forwarding/blocked mode of the ports that are
configured with an STP mode of auto.
Switch Priority
Priority value for this CRF spanning tree instance (0 through 65,535). The priority
is used to construct a bridge id for the CRF as Priority.MAC address (the MAC
address is the base MAC address of the switch + an internal number for the CRF).
The spanning tree entity with the lowest bridge id in a spanning tree becomes the
root. The default is 32,768. (To change individual port properties, select Port
Spanning Tree Parameters...).
Switch Hello Time (in Seconds)
The time this CRF spanning tree instance waits before sending the next Hello
BPDU message when this entity is the root in STP. The default is 2.
The minimum value is 1. The maximum value is the lower of 10 or ((Switch
Maximum Message Age / 2) – 1).
Switch Maximum Message Age (in Seconds)
Maximum message age used when this CRF instance is the root in a spanning tree
domain. This parameter sets the time at which the configuration message used by
the spanning tree algorithm should be discarded. The default is 20. The minimum
value is the higher of 6 or ((Switch Hello Time x 2) + 1).
SmartStack STS16-20RM/STS16-20FRM Token Ring Switches, P/N: 9032957-01 Switch Configuration