Installation guide

Product Description

Port Mirroring The port mirroring feature allows you to unobtrusively monitor the

traffic being received and transmitted on a port on a switch by having

the traffic copied to another switch port. You can connect a network

analyzer to the port functioning as the mirror port to monitor the traffic

without impacting network performance or speed.

Port Trunking 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.

Below are the guidelines to follow when planning a port trunk:

# The switch can support one port trunk at a time.

# A port trunk can consist of 2, 4, or 8 twisted pair ports.

# The duplex mode, speed, and flow control settings must be the

same for all of 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 that are members of different

VLANs.

# When cabling a trunk, the order of the connections should be

maintained on both nodes. The lowest numbered port in a trunk

on the switch should be connected to the lowest numbered port

of the trunk on the other device, the next lowest numbered port

on the switch should be connected to the next lowest numbered

port on the other device, and so on.

For example, assume that you are connecting a trunk between

two AT-8024 switches. On the first AT-8024 switch you had

chosen ports 12, 13, 14, 15 for the trunk. On the second AT-

8024 switch you had chosen ports 21, 22, 23, and 24. To

maintain the order of the port connections, you would

connect port 12 on the first AT-8024 switch to port 21 on the

second AT-8024, port 13 to port 22, and so on.

# 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.