Solarflare
Server
Adapter
User
Guide
Solarflare
Adapters
on
Windows
Issue
20
©
Solarflare
Communications
2017
166
improves
peak
performance.
However
LRO
can
increase
latency
and
should
not
be
used
if
a
host
is
forwarding
received
packets
from
one
interface
to
another.
LRO
is
disabled
by
default.
You
can
also
configure
LSO
and
RSC/LRO
settings
from
the
NDIS
properties.
See
for
more
details.
Ethernet
Link
Speed
Generally,
it
is
neither
necessary
or
desirable
to
configure
the
link
speed
of
the
adapter.
The
adapter
by
default
will
negotiate
the
link
speed
dynamically,
connecting
at
the
maximum,
supported
speed.
However,
if
the
adapter
is
unable
to
connect
to
the
link
partner,
you
may
wish
to
try
setting
a
fixed
link
speed.
For
further
information
see
‘Link
Speed’
in
Ethernet
flow
control
Ethernet
flow
control
allows
two
communicating
devices
to
inform
each
other
when
they
are
being
overloaded
by
received
data.
This
prevents
one
device
from
overwhelming
the
other
device
with
network
packets.
For
instance,
when
a
switch
is
unable
to
keep
up
with
forwarding
packets
between
ports.
Solarflare
adapters
allow
flow
control
settings
to
be
auto
‐
negotiated
with
the
link
partner.
You
can
also
configure
ethernet
flow
control
from
the
network
adapter
properties.
See
for
more
details.
Table
37:
Ethernet
Flow
Control
Options
Option
Description
Auto
‐
negotiate
Flow
control
is
auto
‐
negotiated
between
the
devices.
This
is
the
default
setting,
preferring
Generate
and
respond
if
the
link
partner
is
capable.
Generate
and
respond
Adapter
generates
and
responds
to
flow
control
messages.
Respond
only
Adapter
responds
to
flow
control
messages
but
is
unable
to
generate
messages
if
it
becomes
overwhelmed.
Generate
only
Adapter
generates
flow
control
messages
but
is
unable
to
respond
to
incoming
messages
and
will
keep
sending
data
to
the
link
partner.
None
Ethernet
flow
control
is
disabled
on
the
adapter.
Data
will
continue
to
flow
even
if
the
adapter
or
link
partner
is
overwhelmed.