3Com TR - Manual (Page 68)

4-10 C HAPTER 4: C ONFIGURING WITH THE VT100 I NTERFACE
Port Bridge Configuration
Set the Spanning Tree and Source Routing fields for
the Port using the Bridge selection, located at the
bottom of the Port Setup screen. Choices are:
■ Priority
■ Path Cost
■
Attached LAN ID
■ Max. Route-Desc
■
STE Mode
From the Port Setup screen, perform these steps.
1 Select *Bridge* from the lower portion of the Port
Setup screen.
The Switch 2000 TR Port Bridge Setup screen
appears. See Figure 4-8.
Figure 4-8 Switch 2000 TR Port Bridge Setup Screen
2 Set Spanning Tree parameters as follows:
■
Priority—Port priority determines the choice of
port when the Switch 2000 TR has two ports con-
nected to the same LAN, creating a loop.
The port with the lowest value has the highest pri-
ority and is deleted by Spanning Tree first.
■ Path Cost—Path cost determines the amount of
overhead required to forward packets to the root
through this port.
The higher the path cost, the less likely Spanning
Tree will use a port for forwarding. The lower the
cost, the more likely Spanning Tree will use a port
for routing.
3 Set the Source Routing parameters by toggling the
[Space Bar] as follows:
■ Attached LAN ID—A unique number that identi-
fies the segment to which port is connected. This
value can be set between 0 and FFF (0-4095). A
value of FFFF (65535) indicates that no segment
number has been assigned to this port.
■ Max. Route-Desc—This value describes the
number of routing descriptions allowed in All
Route Explorer (ARE) or Spanning Tree Explorer
(STE) frames. This is also referred to as “hop
count” limit since it limits the number of rings a
packet can traverse.
■ STE Mode—This value determines how this port
responds when presented with Spanning Tree
Explorer (STE) packets. Set fields accordingly by
toggling the [Space Bar].
■
Disabled—Indicates that the port will not
accept or propagate STE packets and any pack-
ets received will be discarded.