
Solarflare
Server
Adapter
User
Guide
Installation
Issue
20
©
Solarflare
Communications
2017
49
2.14
Configure
QSFP+
Adapter
SFN7x42Q
adapters
can
operate
as
2
x
10Gbps
per
QSFP+
port,
or
as
1
x
40Gbps
per
QSFP+
port.
A
configuration
of
1
x
40G
and
2
x
10G
ports
is
not
supported.
Figure
1:
QSFP+
Port
Configuration
for
SFN7x42Q
The
Solarflare
40G
breakout
cables
have
only
2
physical
cables
(see
).
Breakout
cables
from
other
suppliers
may
have
4
physical
cables.
When
connecting
a
third
party
breakout
cable
into
an
SFN7x42Q
40G
QSFP+
cage
(in
10G
mode),
only
cables
1
and
3
will
be
active.
SFN7x42Q
PORT 0
PORT 1
1 x 40g
1 x 40g
SFN7x42Q
PORT 0
PORT 1
sfboot options
port-mode=2x40G
pf-count=1
1 x 10g
g
1 x 10g
1 x 10g
1 x 10g
sfboot options
port-mode=4x10G
pf-count=1
SFN7x42Q
Switch
PORT 0
PORT 0
1
3
2
4
PORT 1
PORT 1
1
3
2
4