3Com 2848-SFP Plus User Manual page 37

To set up the configuration shown in Figure 15, do the
following:
Use the Create VLANs screen (Figure 13) to create
1
VLAN2 on both Switch 1 and Switch 2. (VLAN1 is the
default VLAN and already exists.)
For Switch 1, click the icon under port numbers you
2
want to add to VLAN2 until you see the letter U for
Untagged. Select T or Tagged as the mode for port 16.
Click Apply.
3
For Switch 2, click the icon under port numbers you
4
want to add to VLAN2 until you see the letter U for
Untagged. Select T or Tagged as the mode for port 8.
5 Click Apply.
6 Connect port 16 on Switch 1 to port 8 on Switch 2.
Those ports on Switch 1 that are members of VLAN2
can now communicate with those ports on Switch 2
that are members of VLAN2.
Configuring Trunking
Ports can be statically grouped into a trunk, also known
as an aggregated link under the IEEE 802.1ad standard.
This increases the bandwidth of a network connection
and ensures fault recovery. Trunking permits the
connection of multiple ports to the same remote device
to achieve higher network throughput.
For link aggregation to work, the trunks must be
configured on both ends of the switches.
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The Switch does not support the Link Aggregation
Control Protocol (LACP), which is specified in IEEE
802.3ad.
Guidelines for creating Trunks
Any of the ports on the Switch can be used for
■
creating a trunk.
This Switch can support a maximum of 4 trunks.
■
Each trunk may contain up to 8 members.
■
A port may only be a member of one trunk at any
■
one time.
All ports in a trunk must be configured in an identical
manner, including communication modes such as speed,
duplex mode and flow control.
Defining the Members of a Trunk
Use the Membership/Setup tab of the Link Aggregation
page to specify the members of a trunk.
To define the members of a trunk:
On the Membership/Setup tab, select the same trunk
1
number under Group Membership for the ports that you
want to trunk.
For example, if you want ports 2, 3, 4, and 5 to become
members of Trunk 2, set the Group Membership for
these ports to 2.
Click Apply.
2
Configuring Trunking 37