iMac ethernet connection quit - help?

Tapley, Mark mtapley at swri.edu
Mon Jun 26 17:01:10 CDT 2017


On Jun 26, 2017, at 4:33 PM, Wayne Sudol via cctech <cctech at classiccmp.org> wrote:

> Mark,  try opening a terminal window.  ifconfig -a will show you all
> interfaces and their status. If en0: is down you can try ifconfig  en0: up
> and see if it get an ethernet address. I.E. sudo ifconfig en0 up
> If it comes up, trying pinging your router or any other addresses on your
> local network as a verification.

Wayne, will try this tonight. Thank you! 

> 
> The man page from a terminal window will help with the options to the
> ifconfig command. I.E. man ifconfig
> 
> Here's an example from my mac.
> fconfig -a
> lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
> options=3<RXCSUM,TXCSUM>
> inet6 ::1 prefixlen 128
> inet 127.0.0.1 netmask 0xff000000
> inet6 fe80::1%lo0 prefixlen 64 scopeid 0x1
> nd6 options=1<PERFORMNUD>
> gif0: flags=8010<POINTOPOINT,MULTICAST> mtu 1280
> stf0: flags=0<> mtu 1280
> en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
> options=b<RXCSUM,TXCSUM,VLAN_HWTAGGING>
> ether 10:9a:dd:46:17:fc
> inet6 fe80::139c:ddff:fe56:18fc%en0 prefixlen 64 scopeid 0x4
> inet 10.82.110.47 netmask 0xfffffe00 broadcast 10.82.110.255
> nd6 options=1<PERFORMNUD>
> media: autoselect (100baseTX <full-duplex,flow-control>)
> status: active
> en1: flags=8823<UP,BROADCAST,SMART,SIMPLEX,MULTICAST> mtu 1500
> ether c8:ac:c8:c8:43:d4
> nd6 options=1<PERFORMNUD>
> media: autoselect (<unknown type>)
> status: inactive
> fw0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 4078
> lladdr 70:cc:60:ff:fe:35:ec:26
> nd6 options=1<PERFORMNUD>
> media: autoselect <full-duplex>
> status: inactive
> p2p0: flags=8802<BROADCAST,SIMPLEX,MULTICAST> mtu 2304
> ether 0a:bc:c8:c8:43:d4
> media: autoselect
> status: inactive
> 
> 
> 
> 
> On Mon, Jun 26, 2017 at 12:53 PM, Tapley, Mark via cctech <
> cctech at classiccmp.org> wrote:
> 
>> On Jun 26, 2017, at 10:01 AM, Liam Proven via cctalk <
>> cctalk at classiccmp.org> wrote:
>> 
>>> On 26 June 2017 at 16:44, Tapley, Mark via cctech <cctech at classiccmp.org>
>> wrote:
>>>> All,
>>>>        having problems with my iMac G3. Ethernet stopped working, but
>> still shows some signs of life. Any suggestions welcome!
>> 
>> Liam,
>>        thanks for the response! Note, ethernet *was* working and then
>> stopped, with no obvious action on my part. That said, answers in-line
>> below.
>> 
>>> Some superficially odd questions...
>>> 
>>> What OS is it running?
>> 
>> Mac OS 10.4.11, classic installed.
>> 
>>> Is the firmware up to date?
>> 
>> I don’t know the answer to that. I got it used, and don’t think I have
>> updated it.Is there a good way to tell?
>> 
>>> If the firmware isn't, you *will* experience problems with OS X. If it
>>> is running OS X, you can't update the firmware -- you need Classic
>>> MacOS 9 to do that. :-(
>> 
>> I probably can still have my 9.x install dask - I’ll look - and my 10.4
>> disk. I”m pretty sure there are things I’ll lose doing 2 re-installs, but
>> maybe I can back them up to a USB memory to restore.
>> 
>>> Have you tried a different hub?
>> 
>> Not yet, but will do, hopefully tonight. Does direct (ethernet) connection
>> to another Mac, sharing its wi-fi to computers using ethernet, count in
>> this context? But I also have a hub built into a retired (DSL) modem which
>> I’m thinking about installing there to free up the 8-port hub; this can
>> motivate me to do that sooner.
>> 
>> One other thing I forgot to mention: iPv6 broke this machine’s internet a
>> few months back; so I disabled it through the System Preferences check-box,
>> and it came back up immediately on ipV4. Same thing happened at the same
>> time to the PowerBook G4 (also on 10.4.11) so I attributed that to the
>> service provider (and they actually notified us that they were changing to
>> v6).



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