Allied Telesis AT-S39 - Manual (Page 83)

AT-S39 User’s Guide
83
Port Trunking Overview
Port trunking is an economical way for you to increase the bandwidth
between two Ethernet switches. A port trunk is 2, 3, or 4 ports that have
been grouped together to function as one logical path. A port trunk
increases the bandwidth between switches and is useful in situations
where a single physical data link between switches is insufficient to
handle the traffic load.
A port trunk always sends packets from a particular source to a particular
destination over the same link within the trunk. A single link is
designated for flooding broadcasts and packets of unknown destination.
The example in Figure 20 consists of a port trunk of four data links
between two AT-8024 switches.
Figure 20 Port Trunk Example
Observe the following guidelines when creating a port trunk:
❑ An AT-8000 Series switch can support only one port trunk at a
time.
❑ A port trunk can consist of 2, 3, or 4 ports.
❑ The ports of a port trunk must be of the same medium type. For
example, they can be all twisted pair ports or all fiber optic ports.
❑ The speed, duplex mode, and flow control settings must be the
same for all the ports in a trunk.
❑ The ports of a port trunk must be members of the same VLAN. A
port trunk cannot consist of ports from different VLANs.
Link
Mode
Link
Mode
100
FULL
ACT
MODE
COL
FAULT
MASTER
PWR
AT-8024
10Base-T / 100Base-TX Fast Ethernet Switch RS-232 TERMINAL PORT
Link
Mode
Link
Mode
100
FULL
ACT
MODE
COL
FAULT
MASTER
PWR
AT-8024
10Base-T / 100Base-TX Fast Ethernet Switch RS-232 TERMINAL PORT