Re: [PLUG] Ethernet connection dropping

2017-08-11 Thread Dick Steffens
On 08/10/2017 10:57 PM, Ken Eshelby wrote:
> It can help to have a good/known DHCP server for troubleshooting.  I've
> used various Cisco (router, switch or AP), Mikrotik, and Ubiquiti devices
> as DHCP servers in the past without service issues. My main DHCP server is
> actually an old web server running Ubuntu 8.04 on a 32-bit HTPC box.  Just
> having decent DHCP server logs and a router or managed switch with decent
> logs and some basic interface metrics for your physical or wireless
> connections can eliminate a lot of uncertainty.
>
> I've got a couple Ubuntu 16.04 boxes running on low power hardware that
> don't seem to have issues with leases.
>

For now I've gone back to my 14.04 box. There were too many annoyances 
with 16.04 to run it as my day-to-day machine. I hope to spend some time 
with it this weekend figuring out what the differences are so I can take 
it to the clinic on th 20th and hopefully find things to adjust. I'm not 
losing my DHCP lease with 14.04. Here, DHCP is served by my Buffalo router.

-- 
Regards,

Dick Steffens

___
PLUG mailing list
PLUG@lists.pdxlinux.org
http://lists.pdxlinux.org/mailman/listinfo/plug


Re: [PLUG] Ethernet connection dropping

2017-08-11 Thread Ken Eshelby
It can help to have a good/known DHCP server for troubleshooting.  I've
used various Cisco (router, switch or AP), Mikrotik, and Ubiquiti devices
as DHCP servers in the past without service issues. My main DHCP server is
actually an old web server running Ubuntu 8.04 on a 32-bit HTPC box.  Just
having decent DHCP server logs and a router or managed switch with decent
logs and some basic interface metrics for your physical or wireless
connections can eliminate a lot of uncertainty.

I've got a couple Ubuntu 16.04 boxes running on low power hardware that
don't seem to have issues with leases.

-- 
Ken
___
PLUG mailing list
PLUG@lists.pdxlinux.org
http://lists.pdxlinux.org/mailman/listinfo/plug


Re: [PLUG] Ethernet connection dropping

2017-08-06 Thread Dick Steffens
On 08/06/2017 08:29 AM, Dick Steffens wrote:
> On 08/05/2017 11:56 PM, Russell Senior wrote:
>> "Dick" == Dick Steffens  writes:
>>
>> Dick> Two times over the last three days my machine has dropped its
>> Dick> Ethernet connection. It doesn't say it's dropped, but I can't see
>> Dick> beyond the machine, not even other machines in the house. Using
>> Dick> the widget on the top bar on the Ubuntu MATE 16.04 screen I
>> Dick> manually drop and then reconnect, and all is well again.
>>
>> Dick> I've never had this happen on other machines running various
>> Dick> versions of Ubuntu. Any ideas on where to look to see why the
>> Dick> connection is dropping?
>>
>> Do you still have a dhcp lease?  That is, is there a reasonable ip
>> address attached to the interface?  Do you have a link?  When you say
>> "dropped" does that mean to anywhere?  Do you have a default route?
>

Dropped again. Here are the results of ifconfig:

rsteff@ENU-2:~$ sudo ifconfig
[sudo] password for rsteff:
enp0s31f6 Link encap:Ethernet  HWaddr 70:8b:cd:7f:0c:56
   inet6 addr: fe80::aff0:732b:5508:6fb5/64 Scope:Link
   UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
   RX packets:6750853 errors:0 dropped:0 overruns:0 frame:0
   TX packets:4152265 errors:0 dropped:0 overruns:0 carrier:0
   collisions:0 txqueuelen:1000
   RX bytes:6321412070 (6.3 GB)  TX bytes:867072229 (867.0 MB)
   Interrupt:16 Memory:f710-f712

loLink encap:Local Loopback
   inet addr:127.0.0.1  Mask:255.0.0.0
   inet6 addr: ::1/128 Scope:Host
   UP LOOPBACK RUNNING  MTU:65536  Metric:1
   RX packets:304784 errors:0 dropped:0 overruns:0 frame:0
   TX packets:304784 errors:0 dropped:0 overruns:0 carrier:0
   collisions:0 txqueuelen:1000
   RX bytes:30561735 (30.5 MB)  TX bytes:30561735 (30.5 MB)

 From that I conclude that I don't have a dhcp lease. The lease is 
renewed by clicking on the Wired Connection 1 line in the drop down menu 
called Ethernet Network.

rsteff@ENU-2:~$ sudo ifconfig
enp0s31f6 Link encap:Ethernet  HWaddr 70:8b:cd:7f:0c:56
   inet addr:192.168.0.134  Bcast:192.168.0.255 Mask:255.255.255.0
   inet6 addr: fe80::aff0:732b:5508:6fb5/64 Scope:Link
   UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
   RX packets:6752256 errors:0 dropped:0 overruns:0 frame:0
   TX packets:4153960 errors:0 dropped:0 overruns:0 carrier:0
   collisions:0 txqueuelen:1000
   RX bytes:6321770679 (6.3 GB)  TX bytes:867335636 (867.3 MB)
   Interrupt:16 Memory:f710-f712

loLink encap:Local Loopback
   inet addr:127.0.0.1  Mask:255.0.0.0
   inet6 addr: ::1/128 Scope:Host
   UP LOOPBACK RUNNING  MTU:65536  Metric:1
   RX packets:306131 errors:0 dropped:0 overruns:0 frame:0
   TX packets:306131 errors:0 dropped:0 overruns:0 carrier:0
   collisions:0 txqueuelen:1000
   RX bytes:30680298 (30.6 MB)  TX bytes:30680298 (30.6 MB)

Using the Google FOO:

ubuntu MATE 16.04 loses dhcp lease

I found this:

https://superuser.com/questions/1087359/occasionally-losing-wired-lan-connection-on-ubuntu-16-04

I have to leave in a few minutes, but I'll pursue that further when I 
get back.

Thanks for the pointer to dhcp lease.

-- 
Regards,

Dick Steffens

___
PLUG mailing list
PLUG@lists.pdxlinux.org
http://lists.pdxlinux.org/mailman/listinfo/plug


Re: [PLUG] Ethernet connection dropping

2017-08-06 Thread fredjame
Just a note.
I found out this week that the DHCP client in Linux eventually times out
trying to get a lease.  These machines won't recovery without manual
intervention unless there is a watchdog set.

On Aug 6, 2017 8:32 AM, "Dick Steffens"  wrote:

> On 08/05/2017 11:56 PM, Russell Senior wrote:
> > "Dick" == Dick Steffens  writes:
> >
> > Dick> Two times over the last three days my machine has dropped its
> > Dick> Ethernet connection. It doesn't say it's dropped, but I can't see
> > Dick> beyond the machine, not even other machines in the house. Using
> > Dick> the widget on the top bar on the Ubuntu MATE 16.04 screen I
> > Dick> manually drop and then reconnect, and all is well again.
> >
> > Dick> I've never had this happen on other machines running various
> > Dick> versions of Ubuntu. Any ideas on where to look to see why the
> > Dick> connection is dropping?
> >
> > Do you still have a dhcp lease?  That is, is there a reasonable ip
> > address attached to the interface?  Do you have a link?  When you say
> > "dropped" does that mean to anywhere?  Do you have a default route?
>
> Good questions. Next time it happens I'll check those. And yes,
> "dropped" does mean to anywhere. I have two other machines on my desk
> that it cannot see. They all go through the same switch to get to the
> router. I didn't check both, but I had no trouble getting out to the
> Internet with one of them.
>
> --
> Regards,
>
> Dick Steffens

 Both under my last two ISP's (Verizon.com and Primus.ca) and my current ISP 
(Bell.ca), I did experience  DHCP issues and drops, until I stopped allowing 
the ISP set the DNS, and hard coded  for Google DNS IP's ... very little 
trouble after that.

But your descriptons make me think either faulty cable  or NIC
Regards
Fred James


 
___
PLUG mailing list
PLUG@lists.pdxlinux.org
http://lists.pdxlinux.org/mailman/listinfo/plug


Re: [PLUG] Ethernet connection dropping

2017-08-06 Thread Larry Brigman
Just a note.
I found out this week that the DHCP client in Linux eventually times out
trying to get a lease.  These machines won't recovery without manual
intervention unless there is a watchdog set.

On Aug 6, 2017 8:32 AM, "Dick Steffens"  wrote:

> On 08/05/2017 11:56 PM, Russell Senior wrote:
> > "Dick" == Dick Steffens  writes:
> >
> > Dick> Two times over the last three days my machine has dropped its
> > Dick> Ethernet connection. It doesn't say it's dropped, but I can't see
> > Dick> beyond the machine, not even other machines in the house. Using
> > Dick> the widget on the top bar on the Ubuntu MATE 16.04 screen I
> > Dick> manually drop and then reconnect, and all is well again.
> >
> > Dick> I've never had this happen on other machines running various
> > Dick> versions of Ubuntu. Any ideas on where to look to see why the
> > Dick> connection is dropping?
> >
> > Do you still have a dhcp lease?  That is, is there a reasonable ip
> > address attached to the interface?  Do you have a link?  When you say
> > "dropped" does that mean to anywhere?  Do you have a default route?
>
> Good questions. Next time it happens I'll check those. And yes,
> "dropped" does mean to anywhere. I have two other machines on my desk
> that it cannot see. They all go through the same switch to get to the
> router. I didn't check both, but I had no trouble getting out to the
> Internet with one of them.
>
> --
> Regards,
>
> Dick Steffens
>
> ___
> PLUG mailing list
> PLUG@lists.pdxlinux.org
> http://lists.pdxlinux.org/mailman/listinfo/plug
>
___
PLUG mailing list
PLUG@lists.pdxlinux.org
http://lists.pdxlinux.org/mailman/listinfo/plug


Re: [PLUG] Ethernet connection dropping

2017-08-06 Thread Dick Steffens
On 08/05/2017 11:56 PM, Russell Senior wrote:
> "Dick" == Dick Steffens  writes:
>
> Dick> Two times over the last three days my machine has dropped its
> Dick> Ethernet connection. It doesn't say it's dropped, but I can't see
> Dick> beyond the machine, not even other machines in the house. Using
> Dick> the widget on the top bar on the Ubuntu MATE 16.04 screen I
> Dick> manually drop and then reconnect, and all is well again.
>
> Dick> I've never had this happen on other machines running various
> Dick> versions of Ubuntu. Any ideas on where to look to see why the
> Dick> connection is dropping?
>
> Do you still have a dhcp lease?  That is, is there a reasonable ip
> address attached to the interface?  Do you have a link?  When you say
> "dropped" does that mean to anywhere?  Do you have a default route?

Good questions. Next time it happens I'll check those. And yes, 
"dropped" does mean to anywhere. I have two other machines on my desk 
that it cannot see. They all go through the same switch to get to the 
router. I didn't check both, but I had no trouble getting out to the 
Internet with one of them.

-- 
Regards,

Dick Steffens

___
PLUG mailing list
PLUG@lists.pdxlinux.org
http://lists.pdxlinux.org/mailman/listinfo/plug


Re: [PLUG] Ethernet connection dropping

2017-08-06 Thread Russell Senior
> "Dick" == Dick Steffens  writes:

Dick> Two times over the last three days my machine has dropped its
Dick> Ethernet connection. It doesn't say it's dropped, but I can't see
Dick> beyond the machine, not even other machines in the house. Using
Dick> the widget on the top bar on the Ubuntu MATE 16.04 screen I
Dick> manually drop and then reconnect, and all is well again.

Dick> I've never had this happen on other machines running various
Dick> versions of Ubuntu. Any ideas on where to look to see why the
Dick> connection is dropping?

Do you still have a dhcp lease?  That is, is there a reasonable ip
address attached to the interface?  Do you have a link?  When you say
"dropped" does that mean to anywhere?  Do you have a default route?


-- 
Russell Senior, President
russ...@personaltelco.net
___
PLUG mailing list
PLUG@lists.pdxlinux.org
http://lists.pdxlinux.org/mailman/listinfo/plug