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SmartStack STS16-20D/STS16-20R Token Ring Switches Installation and User Guide Switch Configuration
➽ Note!
When using multiport source route bridging, the internal link to the CRF with
the lowest ring number will be forwarding. The other links will be blocking. This
is because all the other parameters have the same value. This means that it is a good
idea to give the fastest ring the lowest ring number.
•
If
STP Participation
is set to
Base on Bridging Mode
, then the spanning tree
protocol used is based on the bridging mode of the CRF. If the bridging mode
is SRB, the IBM Spanning Tree Protocol is used. If the bridging mode is SRT,
the IEEE 802.1D Spanning Tree Protocol is used.
For a particular CRF the protocols selected here can be overridden. See the STP
Mode parameter in the section “Spanning Tree for CRF Screen” on page 101.
IEEE STP Uses Bridge Functional Address
•
Yes: Sets the IEEE Spanning Tree to use the Bridge Functional Address.
(80 01 43 00 00 00, actually a group address)
•
No: Sets the IEEE Spanning Tree to use the standard IEEE STP Address.
(C0 00 00 00 01 00, default)
➽ Note!
Nodes in the same spanning tree must use the same address
Bridge Priority
Enter a priority value for this spanning tree entity. The bridge with the lowest
priority value in an STP (domain) becomes the root.
➽ Note!
All BRFs in a switch use the same MAC, which means that it is not possible
for more than one BRF to be in the same spanning tree domain.
Range: 0–65535
Default: 32768
Bridge Hello Time (in Seconds)
Enter a time between spanning tree BPDU when this BRF is the root in a spanning
tree domain. The minimum value is 1. The maximum is the lower of 10 or
Switch
Maximum Message Age
/2–1.
Default: 2
Bridge Maximum Message Age (in Seconds)
Enter the maximum message age advertised when this BRF is root. The minimum
value may not be less than the higher of 6 or (2 x (
Switch Hello Time
+ 1)). The
maximum may not be more than the lower of 40 or (2 x (
Switch Forward Delay
–
1)). The range limits that appear reflect the values currently selected for
Switch
Hello Time
and
Switch Forward Delay
.