HP 5900 Guide d'installation télécharger pdf (Page 36)

Figure 32 IRF fabric in ring topology

Identifying physical IRF ports on the member switches

Identify the SFP+ or QSFP+ ports to be used for IRF connections on the member switches according to your

topology and connection scheme.

All the SFP+ and QSFP+ ports on the HP 5900AF-48XG-4QSFP+ switch can be used for IRF connections.

Follow these guidelines when you identify SFP+ ports to be used for IRF connections:

 The SFP+ ports are grouped by port number in ascending order, starting from one. Every four SFP+

ports form one group.

 An SFP+ port can be bound to an IRF port or operate as a service port. When an SFP+ port is bound

to an IRF port, other SFP+ ports in the same port group cannot be used as service ports, and vice versa.

A common practice is to use one SFP+ port group for IRF connections, and bind every two SFP+ ports in the

group to an IRF port for increased bandwidth and availability.

Planning the cabling scheme

Use SFP+/QSFP+ cables or SFP+/QSFP+ transceiver modules and fibers to connect the IRF member

switches. If the IRF member switches are far away from one another, choose the SFP+/QSFP+ transceiver

modules with optical fibers. If the IRF member switches are all in one equipment room, choose SFP+/QSFP+

cables. For more information about available SFP+/QSFP+ cables and transceiver modules, see "SFP+ port"

and "QSFP+ port."

The following subsections describe several HP recommended IRF connection schemes, and all these schemes

use a ring topology.

Connecting the IRF member switches in one rack

Use short-haul and long-haul SFP+ cables to connect the IRF member switches (four switches in this example)

in a rack as shown in Figure 33. The switches in the ring topology (see Figure 34) are in the same order as

connected in the rack.

IRF-port1

IRF-port2

IRF-port1

IRF-port2

2 3

1 2 ... 31 32 33 34 35 36 37 38 39 40 41 ... 59 60

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HP 5900 Guide d'installation Page 36