Copyright © 2020 by Super Micro Computer, Inc.
SSE-C3632S/SR-SMCPL100G | Connectivity Guide
SSE-C3632S/SR-SMCPL100G Quick Connectivity Sheet
Recommended Port Speed Settings
The 100G ports (Cx interfaces) can operate at 40G or as 2x50G or 4 x 25G or 4 x 10G ports. When each Cx
port speed is changed to 25G/10G, it spawns three additional Fx ports. When a 100G port speed is
changed to 50G, it spawns one additional Fx port.
Use the below commands in interface configuration mode to achieve the desired speed.
100G
Default speed is 100G with FEC and AN enabled.
SMIS(config-if)#speed 100000 auto
SMIS(config-if)#speed 100000 fec cl91
SMIS(config-if)#speed 100000 fec off
1. The Cx port is changed to 100G speed
with AN enabled and FEC cl91 enabled.
2. The Cx port is changed to 100G speed
with AN disabled and FEC cl91 enabled.
3. The Cx port is changed to 100G speed
with AN disabled and FEC disabled.
50G
SMIS(config-if)#speed 50000 fec cl74
SMIS(config-if)#speed 50000 fec off
The AN is not applicable on this speed.
1. The Cx port is changed to 50G speed
with FEC cl74 enabled.
2. The Cx port is changed to 50G speed
with FEC disabled.
40G
SMIS(config-if)#speed 40000
The AN is not applicable on this speed.
FEC is not applicable on this speed.
1. The Cx port is changed to 40G speed.
25G
SMIS(config-if)#speed 25000 fec cl74
SMIS(config-if)#speed 25000 fec off
The AN is not applicable on this speed.
1. The Cx port is changed to 25G speed
with FEC cl74 enabled.
2. The Cx port is changed to 25G speed
with FEC disabled.
10G
SMIS(config-if)#speed 10000
The AN is not applicable on this speed.
FEC is not applicable on this speed.
1. The Cx port is changed to 10G speed.
Copyright © 2020 by Super Micro Computer, Inc.
SSE-C3632S/SR-SMCPL100G | Connectivity Guide
Interface Configuration example
The FEC (Forward Error Correction) is required or recommended for 25G/50G/100G link speed. Two
interfaces on each end must use the same FEC setting to establish a link. These supported FEC modes
depend on different port speeds.
100G (cl91, RS FEC)
25G/50G (cl74, BASE-R FEC)
The Cx port can operate at 10G/25G/50G/100G speed. The Fx port can operate at 10G/25G/50G speed.
These Fx ports and Cx port must be in shut down mode to change port speed to default.
Use the below commands in interface configuration mode to achieve the desired speed.
100G
SMIS(config)# int cx-ethernet 0/3
SMIS(config-if)# shutdown
SMIS(config-if)# speed 100000 auto
SMIS(config-if)# no shutdown
1. This setting is recommended for 100G
link speed on DAC cable if link partner
support AN.
2. The FEC setting cl91 on interface Cx0/3
is enabled when port link up.
3. This setting (AN and FEC) is default
setting on all Cx interfaces
SMIS(config)# int cx-ethernet 0/3
SMIS(config-if)# shutdown
SMIS(config-if)# speed 100000 fec cl91
SMIS(config-if)# no shutdown
1. This setting is recommended for 100G
link speed if link partner does not
support AN.
2. This setting can be applicable on DAC
cable and Ethernet optical transceiver.
This setting is required for 100G link
speed on Ethernet optical transceiver.
3. The FEC setting cl91 on interface Cx0/3
is enabled.
SMIS(config)# int cx-ethernet 0/3
SMIS(config-if)# shutdown
SMIS(config-if)# speed 100000 fec off
SMIS(config-if)# no shutdown
1. This setting can be applicable on 100G
link speed if link partner does not
support AN and FEC.
2. This setting is able to get rid of latency
overhead. But this setting may have
error packets introduced over the link
between two interfaces.
2x50G
SMIS(config)# int cx-ethernet 0/3
SMIS(config-if)# shutdown
SMIS(config-if)# speed 50000 fec cl74
SMIS(config-if)# no shutdown
SMIS(config-if)#exit
SMIS(config)# int fx-ethernet 0/8
SMIS(config-if)# shutdown
SMIS(config-if)# speed 50000 fec cl74
SMIS(config-if)# no shutdown
SMIS(config-if)# exit
1. This setting can be applicable on 1x2
DAC cable.
2. When interface Cx0/3 speed is changed
to 50G, it spawns additional port Fx0/8
with 50G.
3. The FEC setting on interface Fx0/8 can
be enabled if required
SMIS(config)# int cx-ethernet 0/3
SMIS(config-if)# shutdown
SMIS(config-if)# speed 50000 fec off
SMIS(config-if)# no shutdown
1. This setting can be applicable on 1x2
DAC cable.