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When you select ports in a port group for IRF links, you must use all or none of the ports in the group
for IRF links. The ports can be bound to different IRF ports.
On an LSWM116Q interface module of the switches, odd and even numbered ports are separated
for grouping. The ports are grouped by port number in order, starting from the lowest odd or even
number. Each group contains two ports with consecutive odd or even port numbers.
Planning the cabling scheme
You can use QSFP28/QSFP+ cables, or QSFP28/QSFP+ transceiver modules and fibers to connect
the S6850/S9850 switches for IRF connections.
If the switches are all in one equipment room, choose QSFP28/QSFP+ cables for IRF connections. If
the switches are far away from one another, choose QSFP28/QSFP+ transceiver modules and fibers
for IRF connections.
For more information about available cables, see
Hardware Information and Specifications.
The following subsections describe several IRF connection schemes by using the QSFP28 cables
and QSFP28 transceiver modules and fibers. As a best practice, use the ring topology for IRF
connections.
Connecting the IRF member switches in one rack
shows an example for connecting four IRF member switches in a rack. The switches in the
) are in the same order as connected in the rack.
Figure4-4 Connecting the switches in one rack
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