Identifying Physical Irf Ports On The Member Switches; Planning The Cabling Scheme - H3C S6820 Series Installation Manual

You can set up IRF links between S6820 switches as follows:
•
Use a QSFP28 module and fiber or a QSFP28 cable to connect QSFP28 ports for a 100-GE
IRF physical connection.
•
Use a QSFP+ module and fiber or a QSFP+ cable to connect QSFP28 ports for a 40-GE IRF
physical connection.
•
Use a 100G QSFP28 to 4 × 25G SFP28 cable to connect a QSFP28 port to four 25G SFP28
ports.
•
Use a QSFP+ module and fiber or a QSFP+ cable to connect QSFP+ ports for a 40-GE IRF
connection.
•
Use an SFP28 module and fiber or an SFP28 cable to connect SFP28 ports for a 25-GE IRF
connection.
You can bind several ports to an IRF port for increased bandwidth and availability.

Identifying physical IRF ports on the member switches

Identify the physical ports for IRF connections on the member switches according to your topology
and connection scheme.
All the QSFP28, QSFP+, and SFP28 ports on the switch can be used for IRF connections, except for
QSFP28 ports on the LSWM18CQMSEC interface module.
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 in a group can be bound to different IRF ports.
The port grouping rules are as follows:
•
The S6820-56HF switch has two port ranges. Ports numbered 1 to 24 are in one range and
ports numbered 33 to 56 are in the other range. In each range, the ports are grouped by port
number in order, starting from the lowest number. Each group contains four ports.
•
On an LSWM124TG2H module, the ports numbered 1 to 24 are grouped by port number in
order, starting from the lowest number. Each group contains four ports.
•
On an LSWM116Q module, 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.
•
The four 25-GE breakout interfaces of a 100-GE port are in one port group. To split a 100-GE
port, use the using twenty-fivegige command.
•
Except the LSWM116Q module, if you use a 40-GE or 100-GE port that is not split for IRF links,
no grouping restrictions exist.

Planning the cabling scheme

You can use QSFP28/QSFP28 to SFP28/QSFP+/SFP28 cables, or QSFP28/QSFP+/SFP28
transceiver modules and fibers to connect the S6820 switches for IRF connections.
If the switches are all in one equipment room, choose QSFP28/QSFP28 to SFP28/QSFP+/SFP28
cables for IRF connections. If the switches are far away from one another, choose
QSFP28/QSFP+/SFP28 transceiver modules and fibers for IRF connections.
For more information about available cables, see
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.
"Appendix C Ports and
36
LEDs."