3com 2848-sfp plus User Guide

To set up the configuration shown in Figure 15, do the 
following:

Use the Create VLANs screen (Figure 13) to create 
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 
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.

For Switch 2, click the icon under port numbers you 
want to add to VLAN2 until you see the letter U for 
Untagged. Select T or Tagged as the mode for port 8.

Click Apply.

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.

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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Any of the ports on the Switch can be used for 
creating a trunk.

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This Switch can support a maximum of 4 trunks.

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Each trunk may contain up to 8 members.

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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. 

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 
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.