TRENDnet TPE-1620WS User's Guide - Page 26

Con Spanning Tree Protocol port settings, Valid Port Priority Values

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TRENDnet User's Guide • Hello Time: The Hello Time is frequency with which the root bridge sends out a BPDU. • Forward Delay: The Forward Delay defines the time that the bridge spends in the listening and learning states. Its range is 4 - 30 seconds. • Transmit Hold Count: The Transmit Hold Count specifies the maximum number of BPDUs that the bridge can send per second. Its range is 1 - 10. • Max Hop Count: The Max Hop Count is a parameter set in a BPDU packet when it originates. It is decremented by 1each time it is retransmitted by the next bridge. When the Hop Count value reaches zero, the bridge drops the BPDU packet. Its range is 6 - 40 hops. In addition, this section also displays the spanning tree root information. TPE-1620WS Configure Spanning Tree Protocol port settings Bridge > Spanning Tree > Port Settings 1. Log into your switch management page (see "Access your switch management page" on page 11). 2. Click on Bridge, click on Spanning Tree, and click on Port Settings. 3. Review the settings. For each entry, click Apply to save changes. • STP Status: Indicates if spanning tree protocol is active or not on the port. Select one of the following choices from the pull-down menu: o Enable - The spanning tree protocol is enabled on the port. o Disabled - The spanning tree protocol is disabled on the port. Enable Disable Note: BPDU passthrough must be disabled for all ports under Physical interface for STP can be enabled. • Priority: Indicates the port priority. If two paths have the same port cost, the bridges must select a preferred path. In some instances this can involve the use of the port priority parameter which is used as a tie breaker when two paths have the same cost. The range for port priority is 0 to 240. As with bridge priority, this range is broken into increments, in this case multiples of 16. To select a port priority for a port, you enter the desired value. Table 1 lists the values that are valid. Valid Port Priority Values Step 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Port Priority 0 16 32 48 64 80 96 112 128 144 160 176 192 208 224 240 • Admin Cost (0 = Auto): The administratively assigned value for the contribution of this port to the path cost of paths towards the spanning tree root. Writing a value of '0' assigns the automatically calculated default Path Cost value to the port. If the default Path Cost is being used, this object returns '0' when read. © Copyright 2013 TRENDnet. All Rights Reserved. 26

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© Copyright 2013 TRENDnet. All Rights Reserved.
TRENDnet User’s Guide
TPE-1620WS
26
•
Hello Time:
The Hello Time is frequency with which the root bridge sends out a
BPDU.
•
Forward Delay:
The Forward Delay defines the time that the bridge spends in
the listening and learning states. Its range is 4 - 30 seconds.
•
Transmit Hold Count:
The Transmit Hold Count specifies the maximum number
of BPDUs that the bridge can send per second. Its range is 1 - 10.
•
Max Hop Count:
The Max Hop Count is a parameter set in a BPDU packet when
it originates. It is decremented by 1each time it is retransmitted by the next
bridge. When the Hop Count value reaches zero, the bridge drops the BPDU
packet. Its range is 6 - 40 hops.
In addition, this section also displays the spanning tree root information.
Configure Spanning Tree Protocol port settings
Bridge > Spanning Tree > Port Settings
1. Log into your switch management page (see “
Access your switch management page
”
on page 11).
2. Click on
Bridge
, click on
Spanning Tree
, and click on
Port Settings
.
3. Review the settings. For each entry, click
Apply
to save changes.
•
STP Status:
Indicates if spanning tree protocol is active or not on the port.
Select one of the following choices from the pull-down menu:
o
Enable
- The spanning tree protocol is enabled on the port.
o
Disabled
- The spanning tree protocol is disabled on the port. Enable
Disable
Note:
BPDU passthrough must be disabled for all ports under Physical
interface for STP can be enabled.
•
Priority:
Indicates the port priority. If two paths have the same port cost, the
bridges must select a preferred path. In some instances this can involve the use
of the port priority parameter which is used as a tie breaker when two paths
have the same cost.
The range for port priority is 0 to 240. As with bridge priority, this range is
broken into increments, in this case multiples of 16. To select a port priority for
a port, you enter the desired value. Table 1 lists the values that are valid.
Valid Port Priority Values
Step
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Port
Priority
0
16 32 48 64 80 96 112 128 144 160 176 192 208 224 240
•
Admin Cost (0 = Auto):
The administratively assigned value for the contribution
of this port to the path cost of paths towards the spanning tree root. Writing a
value of '0' assigns the automatically calculated default Path Cost value to the
port. If the default Path Cost is being used, this object returns '0' when read.