Port Trunking - D-Link DES-3225G Series User Manual

24-port NWay Ethernet Switch User's Guide

Port Trunking

Port trunking is used to combine a number of ports together to make a single high-bandwidth data pipeline.
The participating parts are called members of a trunk group, with one port designated as the master of the
group. Since all members of the trunk group must be configured to operate in the same manner, all settings
changes made to the master port are applied to all members of the trunk group. Thus, when configuring the
ports in a trunk group, you only need to configure the master port.
The DES-3225G supports 3 trunk groups, which may include from 2 to 8 switch ports each, except for the
third trunk group which consists of the 2 ports of the Slot 1, 100BASE-TX or 100BASE-FX front-panel module.
The master port for the first group is preset as port 7, the master port for the second group is port 15 and the
master port for the third group is the first port (1x) on the 2-port module.
Switch Management Concepts
Figure 5-2. After Applying the STA Rules
STA parameters Settings
Bridge Priority lower the #,
higher the
priority
Hello Time 1 - 10 sec.
6 - 40 sec.
Max. Age Time
4 - 30 sec.
Forward Delay
Port Level STA parameters
Enable / Disable Enable /
Disable
Port Priority lower the #,
higher the
priority
Table 5-1. User-selective STA parameters
Effects
Increases chance of Avoid, if the switch is
becoming the Root used in workgroup level
Bridge of a large network
No effect, if not Never set greater than
Root Bridge Max. Age Time
Compete for Root Avoid low number for
Bridge, if BPDU is unnecessary reset of
not received Root Bridge
Max. Age ≤ 2 x
High # delays the
change in state
(Forward Delay - 1)
Max. Age ≥ 2 x (Hello
Time + 1)
Enable or disable Disable a port for
this LAN segment security or problem
isolation
Increases chance of
become Root Port
Comment
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