romeo@lindy.stanford.edu (Patrick Goebel) (08/02/90)
I am using a 4/330 with the le0 ethernet interface on a 10BaseT network (by way of a Cabletron 10BaseT MAU). When I disconnect the 4/330 from the network (i.e by breaking the path between the AUI port on the 4/330 and the RJ-45 wall jack in my office) I receive the console message-- "le0: carrier lost--transceiver cable problem?" --not too surprising. However, when I re-establish the physical path to the network (link light on the MAU is green), the console message persists and I am unable to talk to any other machine on the network. A warm reboot (shutdown -r) does not solve the problem. Only a full shutdown and power cycle appears to revive the carrier. Surely there is a better way--anyone?! Thanks! patrick goebel--romeo@lindy.stanford.edu
jms@tardis.tymnet.com (Joe Smith) (08/09/90)
In article <1990Aug3.002136.4033@rice.edu> lindy!romeo@lindy.stanford.edu
(Patrick Goebel) talks about problems with a Cabletron 10BaseT MAU on
a Sun 4/330. My recommendation is to check the owner's manual for the
Cabletron and/or whatever is at the other end of the twisted pair.
AT&T's StarLan-10 devices have error indicators on each port that light up
when a flurry of bad packets arrive on that port. The port is disabled
and stays that way so you can see the error light when you go grubbing
around in the telephone closets looking for the problem. You clear the
error condition by cycling power to the PC that was misbehaving. For
workstations and servers, where cycling power is a major inconvenience,
the device can be strapped to clear itself after about 20 seconds.
Check with the Cabletron manuals; the MAU may have a similar option.
Joe Smith (408)922-6220 | SMTP: jms@tardis.tymnet.com or jms@gemini.tymnet.com
BT Tymnet Tech Services | UUCP: ...!{ames,pyramid}!oliveb!tymix!tardis!jms
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San Jose, CA 95161-9019 | humorous dislaimer: "My Amiga speaks for me."rar@balungan.west.sun.com (Rob Rosen - Northwest Area Consulting) (08/09/90)
>In article <1990Aug3.002136.4033@rice.edu> lindy!romeo@lindy.stanford.edu >(Patrick Goebel) talks about problems with a Cabletron 10BaseT MAU on >a Sun 4/330. My recommendation is to check the owner's manual for the >Cabletron and/or whatever is at the other end of the twisted pair. > >AT&T's StarLan-10 devices have error indicators on each port that light up >when a flurry of bad packets arrive on that port. The port is disabled >and stays that way so you can see the error light when you go grubbing >around in the telephone closets looking for the problem. You clear the >error condition by cycling power to the PC that was misbehaving. For >workstations and servers, where cycling power is a major inconvenience, >the device can be strapped to clear itself after about 20 seconds. > >Check with the Cabletron manuals; the MAU may have a similar option. The Cabletron MIM (hub concentrator module) does indeed have a two LEDs for every port; in addition, the TPT-T (10BaseT transceiver) has six LEDs. If the LINK LED on the TPMIM-T is blinking, then the MIM has turned off the node in question due to a physical-layer error somewhere, which is usually a yanked AUI cable or miswired crossconnect. If the LINK LED on the transceiver is not lit, then there is no signal going between the transceiver and the MIM - check the UTP wiring and especially the punchdown blocks. Rob Rosen Sun Microsystems, Inc. Professional Services Rob.Rosen@West.Sun.COM [Internet] sun!rar [UUCP] 415.781.8140