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Menus Reference Manual: Edit Remote Site - STP Parameters Menu
STP Parameters Menu
EDIT REMOTE SITE 1 BRIDGE PARAMETERS STP PARAMETERS MENU
Option
1. State
2. Path cost
3. Priority
Enter option number, "=" - main menu, <TAB> - previous menu
>
The STP PARAMETERS MENU allows the setting of the STP port parameters used by the BCP (Bridge Control
Protocol) functions of the router for negotiating bridging during call establishment. All of the settings in this menu will be
ignored when STP is disabled within the Bridging Set-up menu.
1 - State
The State option toggles between enabling and disabling this WAN port when running Spanning Tree Protocol on the
WAN connection to this remote site device.
2 - Path Cost
The Path Cost option allows the setting of the contributing path cost to the Root for this port.
Contribution of Path Cost to Root Path Cost:
The path cost to the Root Bridge is added to path costs of other bridges along the same stream to the Root Bridge. The
result is the Root Path Cost.
Once the Root Bridge is selected, a determination of which bridge(s) will become blocked where necessary is made.
This determination is made by comparing the sum of the path costs (i.e. the Root Path Cost) to the Root Bridge. Where
redundant paths exist, the bridge with the lowest Root Path Cost to the Root Bridge will become the Designated Bridge for
the LAN. If all contending bridges' ports have the same Root Path Costs, then first their Bridge IDs (Priority/MAC
address) and second their Port IDs (Port Priority) will be used as tiebreakers.
Default:
[100]
Range:
1 to 65535
Considerations:
Increasing this value increases the total cost of the path to the Root Bridge. This may (depending on the
topology) cause a bridge along the path to the Root bridge to be taken out of service and a blocked bridge to
come into service.
Decreasing the value may have the opposite effect.
Value
Description
[enabled]
- Enable/disable port
[100]
- Define network cost for port
[128]
- Set port priority
98
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