3Com 4510G manual

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Understand the neighbor devices for one another

Install the interface modules in proper slots as needed. Each Switch 4510G provides two expansion slots.

Determine the ports on different devices to be connected.

Note that:

zWhen 2-port interface modules are used to constitute an IRF of switches and the ports are not assigned to any aggregation group, ports of the interface module in slot 1 (MOD 1) can be connected to ports of MOD 1 or MOD 2. However, the left port can be connected to only the right port of another interface module, that is, two ports at the same side cannot be connected, as shown in Figure 3-20.

Figure 3-20Cable connections in an IRF in the non-aggregate mode with 2-port interface modules

zWhen 2-port interface modules are adopted in an IRF with ports operating in the aggregation mode, ports of MOD 1 can only be connected to ports of MOD 2, and the locations of the ports of the interface modules are not limited.

Figure 3-21Cable connections in an IRF in the aggregation mode with 2-port interface modules

z1-port interface modules do not support port aggregation in the IRF. When 1-port interface modules are connected for an IRF, the port of MOD 1 can only be connected to the port on MOD 2, as shown by callout 1 in Figure 3-22; when a 1-port interface module is connected to a 2-port interface module for an IRF, the port of MOD 1 can only be connected to the right port of the 2-port interface module, as shown by callout 2 in Figure 3-22.

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