Network Settings / Duplex / Auto-Negotiation How To Verify / Check Settings

[Mark Daniels]

I need a little help digesting the following output. Basically, I'm
trying to make sure that en3 is set to 100 Full Duplex / Auto-neg OFF.

Any help would be very much appreciated.

Thanks,

Mark

mybox # netstat -v | egrep "Speed|STATISTICS"
ETHERNET STATISTICS (ent0) :
Media Speed Selected: 100 Mbps Half Duplex
Media Speed Running: Unknown
ETHERNET STATISTICS (ent2) :
Media Speed Selected: Auto negotiation
Media Speed Running: Unknown
ETHERNET STATISTICS (ent1) :
Media Speed Selected: 100 Mbps Half Duplex
Media Speed Running: 100 Mbps Half Duplex
ATM STATISTICS (atm0) :
ETHERNET STATISTICS (ent3) :
Media Speed Selected: 100 Mbps Full Duplex
Media Speed Running: 100 Mbps Full Duplex
mybox #

mybox # lsattr -E -l ent3
busintr 30 Bus interrupt level
False
intr_priority 3 Interrupt priority
False
rx_que_size 512 Receive queue size
False
tx_que_size 8192 Software transmit queue size
True
jumbo_frames no Transmit jumbo frames
True
media_speed 100_Full_Duplex Media Speed (10/100/1000 Base-T
Ethernet) True
use_alt_addr no Enable alternate ethernet address
True
trace_flag 0 Adapter firmware debug trace flag
True
copy_bytes 2048 Copy packet if this many or less bytes
True
tx_done_ticks 1000000 Clock ticks before TX done interrupt
True
tx_done_count 64 TX buffers used before TX done interrupt
True
receive_ticks 50 Clock ticks before RX interrupt
True
receive_bds 6 RX packets before RX interrupt
True
receive_proc 16 RX buffers before adapter updated
True
rxdesc_count 1000 RX buffers processed per RX interrupt
True
stat_ticks 1000000 Clock ticks before statistics updated
True
rx_checksum yes Enable hardware receive checksum
True
flow_ctrl yes Enable Transmit and Receive Flow Control
True
slih_hog 10 Interrupt events processed per interrupt
True

[Todd Tavasci]

en3 is indeed set for 100 Full Duplex and not to Auto Negotiate. The
lsattr output indicates the speed setting that will be used when the
interface is activated. If it were auto-negotiate it would look like the
following:

media_speed Auto_Negotiation Media Speed True

My experience has been that it's always best to set the interface to the
speed you actually want it to run at rather than rely on auto-negotiate.

Regards,
Todd T

[Mark Daniels]

Thank-you. Is it possible for a NIC to be configured as
100/full/auto-neg ON or is auto-neg OFF any time the card is
configured as 100/full or 100/half.

Thanks,

Mark

Todd Tavasci <tta...@attbi.com> wrote in message news:<3D8E44EA...@attbi.com>...

[Timothy J. Bogart]

In article <7ee5b960.0209...@posting.google.com>,

Mark Daniels <md...@yahoo.com> wrote:
>Thank-you. Is it possible for a NIC to be configured as
>100/full/auto-neg ON or is auto-neg OFF any time the card is
>configured as 100/full or 100/half.
>

<snip>

IIRC, you pick one from your list. That is it is 100/Full OR
100/Half OR Autoneg (or a couple of other configurations given
you have a 10/100/1000 card!). Can't be both manually set
and auto-configure in other words.
--
"I'm a big fan of ignorance based techniques, because humans
have a lot of ignorance, and we want to play our strong suit."
Eric Lander New Scientist