
Solarflare
Server
Adapter
User
Guide
Installation
Issue
20
©
Solarflare
Communications
2017
50
SFN8x42
adapters
can
operate
as
4
x
10Gbps
on
QSFP+
port
0,
or
as
1
x
40Gbps
per
QSFP+
port.
A
configuration
of
1
x
40G
and
2
x
10G
ports
is
not
supported.
Figure
2:
QSFP+
Port
Configuration
for
SFN8x42
The
sfboot
utility
from
the
Solarflare
Linux
Utilities
package
(SF
‐
107601
‐
LS)
is
used
to
configure
a
Solarflare
QSFP+
adapter
for
10G
or
40G
operation.
For
example:
#
sfboot
port
‐
mode=2x40G
pf
‐
count=1
SFN8x42
PORT 0
PORT 1
1 x 40g
1 x 40g
SFN8x42
PORT 0
PORT 1
sfboot options
port-mode=2x40G
pf-count=1
1 x 10g
1
1
x
10
10
g
1 x 10g
1 x 10g
1 x 10g
1
1
x
10
10
g
1 x 10g
sfboot options
port-mode=4x10G
pf-count=1
SFN8x42
Switch
PORT 0
PORT 0
1
3
2
4
PORT 1
PORT 1