HP 5120 EI, 5120 SI, 5120 48G manual Planning the cabling scheme, Physical IRF port requirements

Table 12 Physical IRF port requirements

Switch chassis	Candidate physical	Requirements
	IRF ports
		• You must order interface cards separately. For
		long-distance connections, use XFP or SFP+
		transceiver modules and fibers. For short-distance
		connections, use CX4 or SFP+ cables. For more
		information, see “Interface cards (only for the
5120 EI switches	Ports on the expansion	5120 EI switches)“ and “SFP/SFP+/XFP
		transceiver modules and SFP+/CX4 cables (only
(excluding the 5120-24G	interface cards on the	for the 5120 EI switches).”
EI and the 5120-48G EI)	rear panel	• Ports assigned to the same IRF port must be on the
		same interface card.
		• All 5120 EI switches in a ring topology and the
		non-edge switches in a daisy chain topology must
		have at least one two-port interface card or two
		one-port interface cards.
		HP recommends that you use Gigabit SFP ports and
		HP A3600 Switch SFP Stacking Kit cables for IRF
5120 SI switches	All network ports	connection.
		For more information, see “SFP transceiver modules
		and SFP Stacking Kit (only for the 5120 SI switches).”

Planning the cabling scheme

Planning the cabling scheme for a 5120 EI IRF fabric

If 2-port interface cards are used and the IRF links are not aggregate, follow these guidelines on connecting two neighboring 5120 EI switches:

•You can connect the interface card in slot 1 (MOD 1) on a member switch to the MOD 1 or MOD 2 card on its neighboring switch.

•Connect the left port on one interface card to the right port on the other interface card, as shown in Figure 81.

Figure 81 Use 2-port interface cards to set up single-link IRF connection

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