[arch-general] Ping: 100% package loss

[Thorsten Jolitz]

Marcel Hoppe via arch-general <arch-general at archlinux.org> writes:

Hi Marcel, Hi Robin,

thanks for your answers.

> I resolved the same problem 😉 on my systems I run the networkmanager and
> this works long time - I'm not sure but I think the problem was that
> systemd gets or starts its own revolver service. After disabling it and
> deleting the linked resolve.conf the networkmanager creates it after a
> restart again and it works.

In Arch it's all about IPv6 it seems, so I did not want to disable
it. Instead I deleted the old resolve.conf (it was replaced
automatically by systemd). I replaced one (probably wrong) reference to
IPv4 with IPv6 in my config, and started and enabled the network service
again.

Now pinging works for both protocols, and my internet connection went
from incredibly slow to more or less acceptable.

PS
,----
| $ ping -c 3 www.google.com
| PING www.google.com(waw02s07-in-x04.1e100.net
| (2a00:1450:401b:802::2004%2)) 56 data bytes
| 64 bytes from waw02s07-in-x04.1e100.net (2a00:1450:401b:802::2004):
| icmp_seq=1 ttl=53 time=54.2 ms
| 64 bytes from waw02s07-in-x04.1e100.net (2a00:1450:401b:802::2004):
| icmp_seq=2 ttl=53 time=49.2 ms
| 64 bytes from waw02s07-in-x04.1e100.net (2a00:1450:401b:802::2004):
| icmp_seq=3 ttl=53 time=50.2 ms
| 
| --- www.google.com ping statistics ---
| 3 packets transmitted, 3 received, 0% packet loss, time 2003ms
| rtt min/avg/max/mdev = 49.253/51.266/54.294/2.187 ms
`----

,----
| $ ping -c 3 ipv6.google.com
| PING ipv6.google.com(waw02s08-in-x0e.1e100.net
| (2a00:1450:401b:803::200e%2)) 56 data bytes
| 64 bytes from waw02s08-in-x0e.1e100.net (2a00:1450:401b:803::200e):
| icmp_seq=1 ttl=53 time=82.3 ms
| 64 bytes from waw02s08-in-x0e.1e100.net (2a00:1450:401b:803::200e):
| icmp_seq=2 ttl=53 time=48.7 ms
| 64 bytes from waw02s08-in-x0e.1e100.net (2a00:1450:401b:803::200e):
| icmp_seq=3 ttl=53 time=48.8 ms
| 
| --- ipv6.google.com ping statistics ---
| 3 packets transmitted, 3 received, 0% packet loss, time 2003ms
| rtt min/avg/max/mdev = 48.754/59.986/82.355/15.819 ms
`----

,----
| $ ping -c 3 www.web.de
| PING www.g-ha-web.de (82.165.230.17) 56(84) bytes of data.
| 64 bytes from bap.web.de (82.165.230.17): icmp_seq=1 ttl=247 time=226 ms
| 64 bytes from bap.web.de (82.165.230.17): icmp_seq=2 ttl=247 time=27.8
| ms
| 64 bytes from bap.web.de (82.165.230.17): icmp_seq=3 ttl=247 time=27.4
| ms
| 
| --- www.g-ha-web.de ping statistics ---
| 3 packets transmitted, 3 received, 0% packet loss, time 2003ms
| rtt min/avg/max/mdev = 27.429/93.814/226.124/93.557 ms
`----

> Greets,
> Marcel
>
> Am 22.01.2017 17:31 schrieb "Robin via arch-general" <
> arch-general at archlinux.org>:
>
>> Hi,
>>
>> seems like a ipv6 related problem. Your DNS Lookup is v4, first ping is
>> v6 and second ping is v4 again. Try to ping the ipv4 address of
>> google.com. But im pretty sure this is not arch related.
>>
>> Maybe you should try to disable ipv6 system wide and then check if it
>> works.
>>
>> Cheers,
>> Robin
>> > Hello List,
>> > sometime age my msmtp imap connections just stopped working.
>> > Investigating the cause, I checked quite a lot of things, and came
>> > across the ping "100% package loss" problem:
>>
>

-- 
cheers,
Thorsten