User's Guide

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TRENDnet User’s Guide
TPE-3012LS / TPE-3018LS
79
Configure Spanning Tree Protocol Port settings
Spanning Tree > Port Setting
1. Log into your switch management page (see “Access your switch management page”
on page 11).
2. Click on Spanning Tree and click on Port Setting.
3. Check the ports in the list you would like to edit for spanning tree protocol and click
Edit.
4. In Edit Port section, review the settings below. Click Apply to save the configuration
changes.
• State – Check Enable to enable the port for spanning tree. By default, all ports
are enabled for spanning tree but the protocol is not active until enabling
spanning tree globally under Spanning Tree > Property.
• Path Cost - The path cost (or bridge priority value) to the root bridge can be
entered manually or enter 0 for the path cost to be determined automatically.
• 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
• Edge Port – Check the option to set the port as an edge port. Edge ports are
connected edge devices such as hosts or workstations that are not switches
part of the spanning tree protocol topology. If ports are set to edge ports, they
can start forwarding traffic immediately as soon as the link is up. MSTP
requires, that edge ports and non-edge ports are manually set.
• BPDU Filter - If BPDU filtering is selected for spanning tree protocol, it will
check ports for sending and receiving BPDUs. If selecting filtering, then all ports
with edge devices such as workstations should have BPDU Filter enabled under
Spanning > Port Setting. Do not enable BPDU filtering on ports that are
connected to other switches that would be BPDU spanning tree protocol
information. For BPDU filtering to work, the BPDU handling option under
Spanning Tree > Property must be set to BPDU filtering.
• BPDU Guard – Enabling BPDU Guard adds an extra layer of security to spanning
tree by temporarily disabling all edge ports upon receiving BPDU data from
other switches about the spanning tree status and topology. This prevents
possible attacks to the flow of network traffic through spanning tree from edge
port devices and limiting spanning tree control information to and from only
the designated ports connected to other switches part of the spanning tree
topology.
• Point-to-Point – This option specifies the spanning tree link type and is taken
from the port duplex mode. For 802.1w Rapid Spanning Tree or MSTP to use
fast transition, these spanning tree protocols only use point-to-point links
between switches meaning full duplex mode. It is recommended to keep this
setting as Auto.
• Port State – Displays the current spanning tree state of the selected port.
• Designated Bridge – Displays the current MAC address of the designated bridge
in the spanning tree topology/configuration.
• Desigated Port ID – Displays the current designated port in the spanning tree
topology/configuration.
• Operational Edge – Displays if the selected port is configured as an edge port.
• Operational Point-to-Point – Displays if the selected port is configured as a
point-to-point spanning tree link to another switch in the spanning tree
topology/configuration.