Thanks so much to the 7 folks who've gotten back to me in the last 20
minutes on this question. I asked:
If we were to change an interface successfully on the fly from
10baseT half-duplex to 100baseT full-duplex, how could we tell without
rebooting and checking boot logs whether the change was successful?
The consensus was there's no good way to check this without looking at
boot log. A few people mentioned ifconfig, but ifconfig really
tells you nothing about speed or duplex status. The best suggestions were
to move data over net:
-----------------------------------------------------
John Speno said:
"copy some large files over the network and check your
netstat -i for errors and such to make sure you are in the correct duplex."
Alex Nord said:
"FTP a large file to another machine (which you KNOW is running 100/full)
on the same local subnet, and time it. If you're getting multiple
megabytes/second, then I'd say you've succeeded."
Others mentioned that ftp might show duplex mismatch problems, as would
netstat.
------------------------------------------
A Mahendra Rajah mentioned trying the "consvar" command, which I'd never tried,
but it doesn't access the NIC info unfortunately.
David Hull noted that the NIC would have a light that would show if the
speed was set to 100 - I use this a lot. He also mentioned setting ifconfig
to debug mode, and finding out where it logs to, and that these logs might
tell us the situation - didn't try this.
It was noted by one respondant (whose last name I don't remember, sorry Ron !)
that the problem with doing it on the fly is the router it talks to, and that
you may be able to change it on the host end but must then make sure the
router end corresponds before it'll work - it probably will be broken until
they coordinate.
In the end I was able to talk a remote sysadmin (this is a colo, we can't touch
it) through using uerf to check, and it seems to be set correctly, so
we are going to hope for the best when their site goes live in a few minutes.
Thanks again to all the good folks on this list!
--
Judith Reed
jreed_at_appliedtheory.com
(315) 453-2912 x5835
Received on Mon Apr 17 2000 - 15:35:51 NZST