# ifconfig 6in4
6in4: flags=209<UP,POINTOPOINT,RUNNING,NOARP> mtu 1280
inet6 2a01:4f8:140:71f5:1::ffff prefixlen 128 scopeid 0x0<global>
inet6 fe80::a08:1 prefixlen 64 scopeid 0x20<link>
inet6 fe80::2e04:7ca5 prefixlen 64 scopeid 0x20<link>
inet6 fe80::a0a:a01 prefixlen 64 scopeid 0x20<link>
sit txqueuelen 1 (IPv6-in-IPv4)
RX packets 563 bytes 69361 (67.7 KiB)
RX errors 1200 dropped 0 overruns 0 frame 1200
TX packets 600 bytes 164726 (160.8 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
Above is the result of running ifconfig on my 6in4 device. The problem is the
"RX errors" which correspond to ICMP packets missing.
The system at the far end of the 6in4 link has monitoring that includes
"ping6 www.google.com", until recently that was fine, since upgrading to
Debian kernel 4.9.0-7-amd64 #1 SMP Debian 4.9.110-1 problems have started.
The problems are somewhat intermittent.
I don't expect that the recent Debian kernel upgrade broke this, maybe the
reboot exposed some other problem.
Does anyone know what "RX errors" means in the context of 6in4 interfaces on
Linux? Is there any way of getting the kernel to log every error to dmesg or
something? I expect this will be a really easy problem to solve once I know
what the errors mean.
When the errors happen I run tcpdump on the far end of the 6in4 link and see
the packets going out, I run tcpdump on the ethernet device and see the
encapsulated packets going in, and when I run tcpdump on the 6in4 device I
don't see those packets but I do see packets for local ipv6 addresses.
Here's the /etc/network/interfaces section from the server:
auto 6in4
iface 6in4 inet6 v4tunnel
address 2a01:4f8:140:71f5:1::ffff
netmask 128
endpoint 203.15.121.80
ttl 64
up ip link set mtu 1280 dev 6in4
up ip route add 2a01:4f8:140:71f5:1::/96 dev 6in4
Here's the /etc/network/interfaces section from the other end:
auto 6in4
iface 6in4 inet6 v4tunnel
address 2a01:4f8:140:71f5:1::1
netmask 128
endpoint 46.4.124.165
ttl 64
up ip route add 2a01:4f8:140:71f5:1::ffff dev 6in4
up ip link set mtu 1280 dev 6in4
up ip route add 2000::/3 dev 6in4
Here's the result of running tcpdump on the server, those encapsulated packets
look ok and should go to the 6in4 device.
# tcpdump -i br0 -n host 203.15.121.80
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on br0, link-type EN10MB (Ethernet), capture size 262144 bytes
01:18:57.333752 IP 203.15.121.80 > 46.4.124.165: IP6 2a01:4f8:140:71f5:1::4 >
2404:6800:4006:800::2004: ICMP6, echo request, seq 14, length 64
01:18:58.357831 IP 203.15.121.80 > 46.4.124.165: IP6 2a01:4f8:140:71f5:1::4 >
2404:6800:4006:800::2004: ICMP6, echo request, seq 15, length 64
01:18:59.381702 IP 203.15.121.80 > 46.4.124.165: IP6 2a01:4f8:140:71f5:1::4 >
2404:6800:4006:800::2004: ICMP6, echo request, seq 16, length 64
01:19:00.405686 IP 203.15.121.80 > 46.4.124.165: IP6 2a01:4f8:140:71f5:1::4 >
2404:6800:4006:800::2004: ICMP6, echo request, seq 17, length 64
Any ideas?
--
My Main Blog http://etbe.coker.com.au/
My Documents Blog http://doc.coker.com.au/
Last chance to get a bundle of Linux books:
-------- Forwarded Message --------
Subject: [Linux-aus] Linux Humble Bundle today
Date: Mon, 30 Jul 2018 08:34:13 +1000
From: Kathy Reid via linux-aus <linux-aus(a)lists.linux.org.au>
Reply-To: Kathy Reid <kathy(a)kathyreid.id.au>
To: linux-aus(a)lists.linux.org.au
https://www.humblebundle.com/books/linux-geek-books?partner=itsfoss
Best, Kathy
_______________________________________________
linux-aus mailing list
linux-aus(a)lists.linux.org.au
http://lists.linux.org.au/mailman/listinfo/linux-aus
I just found a reference to this in my email - it came to me last week
from a WA government mailing list.
https://www.pmc.gov.au/resource-centre/public-data/issues-paper-data-sharin…
I have not looked at this in detail yet, but open data strikes me as
very important for open source software.
Has this been discussed in the open source community?
Am I misreading its relevance?
HDixon
Hey folks,
Where's a good place to learn about IPv6?
I've *mostly* got my head around IPv4 these days, and my ISP still only has
an unsupported 6rd gateway which I've tried with momentary success on my
router.
I understand that the address space is 128 bits vs 32, that successive
colons mean 0000 between them, that devices can have "local" and "global"
scoped addresses, and it's *supposed* to do away with NAT... but that's
about as far as I've gotten :)
A server I lease overseas has an IPv6 address block assigned to it, and I'm
struggling to figure out how I'm supposed to assign a reverse DNS to it, so
Google and friends don't flag it for the MTA not having a reverse lookup
(for now, I just lock it to IPv4)... I figured I might as well learn more
about how it works, different to IPv4..
Any practical pointers?
We hear the chimes when the computer starts but then sometimes there is
sound sometimes there isn't, sometimes when there is sound it vanishes
after the computer suspends. Everything else about the computer seems to be
working fine.
It is a dell laptop running ubuntu 16.04.
Have worked though the first two steps in this with no effect.
About to start working on step 3 but in if anyone has any better ideas they
would be most welcome.
https://help.ubuntu.com/community/SoundTroubleshootingProcedure
Could bring the laptop to a meeting in Melbourne if someone could look at
it for me. I have lost my voice and may not speak on doctors orders so we
would have to discuss the problem even if face to face in writing. Anything
to make life more complicated than it already is.
All the best
--
Stripes Theotoky
-37 .713869
145.050562
Hi,
Does anyone know how I can save (and later restore) the positions of my
windows on my screens?
On my laptop I'm running openbox as my window manager on Ubuntu 18.04.
At my desk I have a docking station with 2 external monitors. I've
configured keyboard shortcuts in openbox to configure my screens
appropriately for docked or undocked configuration (using xrandr).
Whenever I undock all my windows get moved over to fit on the laptop
screen - so when I dock the laptop again the windows are in the wrong
locations, and I have to manually position them in the appropriate
locations for my external monitors.
What I would like is a way to save my window positions before undocking,
and then a way to restore these window positions when I dock again later.
Does anyone have a solution or suggestions to help with this problem?
Regards,
Kim
What's a good real-time log watching program?
This is something I've wanted for a while but not had the inclination to get
it going. The thing that finally made me want to do it is when my workstation
gave the below log messages and decided to stop supporting USB 3.0 ports. As
the ports that are most convenient for connecting my keyboard and mouse are
USB 3.0 that was inconvenient. Removing the xhci modules and loading them
again fixed the problem. So what I want in this instance is a program that
will detect one of the below messages and then run a script that will run some
rmmod and modprobe commands to fix it. I want it to know which log entries it
has dealt with to avoid performing the operation twice (which would cause
problems) or maybe have a list of log messages in the problem solved category.
Any suggestions?
[18408.111698] xhci_hcd 0000:06:00.0: xHCI host not responding to stop
endpoint command.
[18408.111716] xhci_hcd 0000:06:00.0: xHCI host controller not responding,
assume dead
[18408.111738] xhci_hcd 0000:06:00.0: HC died; cleaning up
[18408.111747] xhci_hcd 0000:06:00.0: Timeout while waiting for configure
endpoint command
--
My Main Blog http://etbe.coker.com.au/
My Documents Blog http://doc.coker.com.au/
I'm hoping someone here may have some insight to cabling
responsibilities under the NBN and also my expected rights under the
Customer Service Guarantee (CSG).
I was talking to Internode today about transitioning to the NBN and had
a few surprises:
1. I will now be responsible for the cabling from my wall socket to some
as yet undefined location in the street (sales guy couldn't tell me
where that was).
2. I have to waive my rights to the CSG.
I have had two occasions in the last year when I've had to call Telstra
to come and fix my line issues (which they did at no cost to me). What
can I expect under the NBN?
--
Tom Robinson
19 Thomas Road Mobile: +61 4 3268 7026
Healesville, VIC 3777 Home: +61 3 5962 4543
Australia GPG Key: 8A4CB7A7
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