Allied Telesis AT-S24 - Manual (Page 74)

Configuring the Ports
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Guideline 5: Maintaining Cabling Sequence Based on Port Number
When cabling a trunk, it is important that the order of the connections
be identical on both nodes. The lowest numbered port in a trunk on one
device must be connected to the lowest numbered port of the trunk on
the other device, the next lowest numbered port must be connected to
the next lowest numbered port on the other device, and so on.
For example, assume that you are installing a trunk from an AT-8224XL
Switch to an AT-8288XL Switch. On the AT-8224XL Switch you had
chosen ports 12, 13, 14, 15 from port group two for the trunk. On the AT-
8288XL Switch you had chosen ports 6, 7, 8, and 9 from port group 1. To
maintain the order of the port connections, you would connect port 12
on the AT-8224XL Switch to port 6 on the AT-8288XL, port 13 to port 7,
and so on.
Guideline 6: Configuring the Port Parameters of a Port Trunk
The ports in a trunk automatically assume the same configuration (such
as VLAN membership) as the configuration of the lowest numbered port.
For example, if you create a trunk consisting of ports 4, 5, 6, and 7, port 4
is the master port and its configuration is propagated to ports 5, 6, and 7.
As long as the ports are configured as a trunk, you must not change any
of the attributes of ports 5, 6, and 7 that might conflict with the settings
of port 4.
Guideline 7: Using Expansion Modules
Some expansion modules support port trunking. This depends on the
number of ports on the module, as shown in Table 4.
Table 4 Port Trunking on Expansion Modules
Number of Ports on Expansion
Module Number of Port Trunks
1 No port trunking.
2 One port trunk consisting of 2 ports.
4 One port trunk consisting of 2 ports or 4 ports.