Hello,
We got our Lantronix LSW8F fast ethernet workgroup switch today.
Unfortunately we didn't look close enough and bought the cheapest
version which cannot be configured manually. It determines its speeds
only via auto-negotiation.
While this works for the speed with the DE500-BA card under Digital
Unix 4.0D, the auto-negotiation for the duplex mode fails!
DU 4.0D always happily negotiates 100MBit/full duplex mode but the
switche's LEDS still signal half duplex mode. Indeed its a duplex-mode
mismatch because the transfer speed drops a lot.
This is what I see in my logs:
vmunix: tu0: auto negotiation restart: will advertise 100BaseTX: full duplex
vmunix: tu0: link up: negotiated 100BaseTX: full duplex
which looks good.
Now: Lantronix support tells me:
"As mentioned in the LSW8F Installation Guide the device must support"
"Clause 28 of the IEEE 802.3u specification. If not, the connection"
"will default to half duplex mode."
But "man lan_config" is only talking about:
-a [0|1]
Enables (1) or disables (0) IEEE 802.3u autonegotiation. This option
applies only to those devices that are capable of autonegotiation (for
example, DE500-AA and DE500-BA). When enabled, the interface automati-
cally negotiates the link speed (10 or 100 Mb/s) and the mode (half-
duplex or full-duplex) with the remote interface.
So what about the "Clause 28" ?? Is this supported on the DE500-BA and
Digital Unix 4.0D?
Thanks a lot -- Tom
P.S: I'm still owing you all two summaries. I hope that I can put them
together this weekend.
--------------------------------------------------------------------------
T o m L e i t n e r Dept. of Communications
Graz University of Technology,
e-mail : tom_at_finwds01.tu-graz.ac.at Inffeldgasse 12
Phone : +43-316-873-7455 A-8010 Graz / Austria / Europe
Fax : +43-316-463-697
Home page :
http://wiis.tu-graz.ac.at/people/tom.html
PGP public key on :
ftp://wiis.tu-graz.ac.at/pgp-keys/tom.asc or send
mail with subject "get Thomas Leitner" to pgp-public-keys_at_keys.pgp.net
--------------------------------------------------------------------------
Before we have the paperless office, we have the paperless toilet!
Received on Fri Apr 17 1998 - 20:37:21 NZST