Solarflare
Server
Adapter
User
Guide
Solarflare
Adapters
on
Linux
Issue
20
©
Solarflare
Communications
2017
136
3.31
Running
Cable
Diagnostics
Cable
diagnostic
data
can
be
gathered
from
the
Solarflare
10GBASE
‐
T
adapters
physical
interface
using
the
ethtool
‐
t
command
which
runs
a
comprehensive
set
of
diagnostic
tests
on
the
controller,
PHY,
and
attached
cables.
To
run
the
cable
tests
enter
the
following
command:
ethtool
‐
t
ethX
[online
|
offline]
Online
tests
are
non
‐
intrusive
and
will
not
disturb
live
traffic.
CAUTION:
Offline
tests
should
not
be
run
while
sfptpd
is
running.
The
PTP
daemon
should
be
terminated
before
running
the
offline
test.
The
following
is
an
extract
from
the
output
of
the
ethtool
diagnostic
offline
tests:
phy
cable.pairA.length
9
phy
cable.pairB.length
9
phy
cable.pairC.length
9
phy
cable.pairD.length
9
phy
cable.pairA.status
1
phy
cable.pairB.status
1
phy
cable.pairC.status
1
phy
cable.pairD.status
1
Cable
length
is
the
estimated
length
in
metres.
A
length
value
of
65535
indicates
length
not
estimated
due
to
pair
busy
or
cable
diagnostic
routine
not
completed
successfully.
The
cable
status
can
be
one
of
the
following
values:
0
‐
invalid,
or
cable
diagnostic
routine
did
not
complete
successfully
1
‐
pair
ok,
no
fault
detected
2
‐
pair
open
or
Rt
>
115
ohms
3
‐
intra
pair
short
or
Rt
<
85
ohms
4
‐
inter
pair
short
or
Rt
<
85
ohms
9
‐
pair
busy
or
link
partner
forces
100Base
‐
Tx
or
1000Base
‐
T
test
mode.
chanX
eventq.poll
Verifies
the
adapter’s
event
handling
capabilities
by
posting
a
software
event
on
each
event
queue
created
by
the
driver
and
checking
it
is
delivered
correctly.
The
driver
utilizes
multiple
event
queues
to
spread
the
load
over
multiple
CPU
cores
(RSS).
phy.bist
Examines
the
PHY
by
initializing
it
and
causing
any
available
built
‐
in
self
tests
to
run.
Table
29:
Adapter
Diagnostic
Tests
Diagnostic
Test
Purpose