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From: Guillaume Nault <gnault@redhat.com>
To: linux-ppp@vger.kernel.org
Subject: Re: PPPoE Modem hangup after random time - how to debug?
Date: Fri, 24 Apr 2020 15:54:59 +0000	[thread overview]
Message-ID: <20200424155459.GB21114@pc-3.home> (raw)
In-Reply-To: <CAPJ9Yc8Wvxb_UoqGu=wrrWX2HP5AwE98jvcS3XYnvevxa0RZpg@mail.gmail.com>

On Thu, Apr 23, 2020 at 02:13:14PM +0200, David Balažic wrote:
> Oh, i'm "lucky", shortly after starting "tcpdump -i eth1.3902 pppoed"
> there was another disconnect:
> 
> Thu Apr 23 11:44:13 2020 daemon.notice pppd[10756]: Modem hangup
> 
> tcpdump output:
> 
> listening on eth1.3902, link-type EN10MB (Ethernet), capture size 262144 bytes
> 11:44:09.749322 PPPoE PADO [Service-Name] [AC-Name "SIMB_TABOR_BNG1"]
> [Host-Uniq 0x44************long_number******************************AA]
> [AC-Cookie ".5b************v"]
> 11:44:09.754297 PPPoE PADS [ses 0x1] [Service-Name] [Host-Uniq
> 0x44*******************long_number*********************************AA]
> 11:44:13.115312 PPPoE PADT [ses 0x1]
> 11:44:13.126422 PPPoE PADT [ses 0x1] [Host-Uniq 0x00002A04] [AC-Cookie
> 0xED****************************75]
> tcpdump: pcap_loop: The interface went down
> 4 packets captured
> 22 packets received by filter
> 0 packets dropped by kernel
> 
> 
> The ifconfig packet counter for the VLAN interface eth1.3902 is reset,
> compare to values in quested message below, this is th eoutpu a few
> minutes after the reconnect:
> 
> eth1      Link encap:Ethernet  HWaddr C4:3D:C7:90:CE:ED
>           inet6 addr: fe80::c63d:c7ff:fe90:ceed/64 Scope:Link
>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>           RX packets:24193753 errors:0 dropped:0 overruns:3 frame:0
>           TX packets:12513809 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:1000
>           RX bytes:4171215264 (3.8 GiB)  TX bytes:2485973 (2.3 MiB)
>           Interrupt:5
> 
> eth1.3902 Link encap:Ethernet  HWaddr C4:3D:C7:90:CE:ED
>           inet6 addr: fe80::c63d:c7ff:fe90:ceed/64 Scope:Link
>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>           RX packets:255930 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:42015 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:1000
>           RX bytes:126494373 (120.6 MiB)  TX bytes:25853728 (24.6 MiB)
> 
You can monitor the evolution of you network devices with rtmon:
$ rtmon file ./some/file.log link

Then read it with ip monitor:
$ ip monitor file ./some/file.log

That should tell if eth1.3902 is ever passed down or even deleted.

  parent reply	other threads:[~2020-04-24 15:54 UTC|newest]

Thread overview: 44+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-22 17:45 PPPoE Modem hangup after random time - how to debug? David Balažic
2020-04-22 19:51 ` Michael Richardson
2020-04-22 22:00 ` James Carlson
2020-04-23  0:08 ` Guillaume Nault
2020-04-23  0:41 ` Michael Richardson
2020-04-23  2:01 ` James Carlson
2020-04-23 10:37 ` David Balažic
2020-04-23 11:12 ` David Balažic
2020-04-23 12:13 ` David Balažic
2020-04-23 15:59 ` Michael Richardson
2020-04-23 16:01 ` Michael Richardson
2020-04-24 13:47 ` David Balažic
2020-04-24 14:02 ` David Balažic
2020-04-24 14:26 ` James Carlson
2020-04-24 15:44 ` Guillaume Nault
2020-04-24 15:54 ` Guillaume Nault [this message]
2020-04-26  1:38 ` Michael Richardson
2020-04-26 12:44 ` David Balažic
2020-04-26 12:48 ` David Balažic
2020-04-26 19:03 ` David Balažic
2020-04-27  2:14 ` Michael Richardson
2020-04-27  9:59 ` David Balažic
2020-04-27 13:43 ` James Carlson
2020-04-27 20:08 ` Guillaume Nault
2020-04-27 20:30 ` Guillaume Nault
2020-04-27 23:34 ` David Balažic
2020-04-28 10:18 ` David Balažic
2020-04-28 11:00 ` Guillaume Nault
2020-04-29 11:58 ` David Balažic
2020-05-03 10:31 ` David Balažic
2020-05-04 12:27 ` Guillaume Nault
2020-05-04 13:01 ` Guillaume Nault
2020-05-04 15:54 ` David Balažic
2020-05-04 16:36 ` David Balažic
2020-05-04 18:11 ` Guillaume Nault
2020-05-04 18:43 ` David Balažic
2020-05-06  9:52 ` David Balažic
2020-05-06 10:34 ` David Balažic
2020-05-06 14:26 ` Guillaume Nault
2020-05-06 15:02 ` Guillaume Nault
2020-05-06 15:15 ` James Carlson
2020-05-06 15:39 ` David Balažic
2020-05-06 15:54 ` David Balažic
2020-05-06 20:20 ` Guillaume Nault

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