* Issue with ping source address display
@ 2016-04-12 17:52 Daniele Orlandi
2016-04-12 19:38 ` Julian Anastasov
2016-04-12 22:59 ` 吉藤英明
0 siblings, 2 replies; 6+ messages in thread
From: Daniele Orlandi @ 2016-04-12 17:52 UTC (permalink / raw)
To: netdev
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Hello,
More than one year ago I posted the following message but it hasn't
received a reply, now I've been stung by a similar issue, you may want
to investigate:
I noticed that when ping receives ICMP messages from different sources
the first IP address is always used and displayed:
vihai@seviolab:~$ ping -V
ping utility, iputils-s20121221
This is a (simulated) flapping route:
vihai@seviolab:~$ ping 10.254.10.140
PING 10.254.10.140 (10.254.10.140) 56(84) bytes of data.
From 192.168.1.1 icmp_seq=1 Destination Host Unreachable
From 192.168.1.1 icmp_seq=2 Destination Host Unreachable
From 192.168.1.1 icmp_seq=3 Destination Host Unreachable
64 bytes from 192.168.1.1: icmp_seq=4 ttl=61 time=24.7 ms
64 bytes from 192.168.1.1: icmp_seq=5 ttl=61 time=25.6 ms
64 bytes from 192.168.1.1: icmp_seq=6 ttl=61 time=69.6 ms
From 192.168.1.1 icmp_seq=7 Destination Host Unreachable
From 192.168.1.1 icmp_seq=8 Destination Host Unreachable
From 192.168.1.1 icmp_seq=9 Destination Host Unreachable
^C
--- 10.254.10.140 ping statistics ---
9 packets transmitted, 3 received, +6 errors, 66% packet loss, time 8001ms
rtt min/avg/max/mdev = 24.797/40.061/69.692/20.955 ms
The sources, however are different:
vihai@seviolab:~$ sudo tcpdump -n icmp
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth0, link-type EN10MB (Ethernet), capture size 65535 bytes
^[OA^[OA^[OA17:09:55.932981 IP 192.168.1.21 > 10.254.10.140: ICMP echo
request, id 9278, seq 1, length 64
17:09:55.933234 IP 192.168.1.1 > 192.168.1.21: ICMP host 10.254.10.140
unreachable, length 92
17:09:56.933169 IP 192.168.1.21 > 10.254.10.140: ICMP echo request, id
9278, seq 2, length 64
17:09:56.933416 IP 192.168.1.1 > 192.168.1.21: ICMP host 10.254.10.140
unreachable, length 92
17:09:57.933160 IP 192.168.1.21 > 10.254.10.140: ICMP echo request, id
9278, seq 3, length 64
17:09:57.933404 IP 192.168.1.1 > 192.168.1.21: ICMP host 10.254.10.140
unreachable, length 92
17:09:58.933163 IP 192.168.1.21 > 10.254.10.140: ICMP echo request, id
9278, seq 4, length 64
17:09:58.957939 IP 10.254.10.140 > 192.168.1.21: ICMP echo reply, id
9278, seq 4, length 64
17:09:59.935050 IP 192.168.1.21 > 10.254.10.140: ICMP echo request, id
9278, seq 5, length 64
17:09:59.960724 IP 10.254.10.140 > 192.168.1.21: ICMP echo reply, id
9278, seq 5, length 64
17:10:00.936177 IP 192.168.1.21 > 10.254.10.140: ICMP echo request, id
9278, seq 6, length 64
17:10:01.005849 IP 10.254.10.140 > 192.168.1.21: ICMP echo reply, id
9278, seq 6, length 64
17:10:01.936313 IP 192.168.1.21 > 10.254.10.140: ICMP echo request, id
9278, seq 7, length 64
17:10:01.936626 IP 192.168.1.1 > 192.168.1.21: ICMP host 10.254.10.140
unreachable, length 92
17:10:02.935321 IP 192.168.1.21 > 10.254.10.140: ICMP echo request, id
9278, seq 8, length 64
17:10:02.935591 IP 192.168.1.1 > 192.168.1.21: ICMP host 10.254.10.140
unreachable, length 92
17:10:03.934322 IP 192.168.1.21 > 10.254.10.140: ICMP echo request, id
9278, seq 9, length 64
17:10:03.934613 IP 192.168.1.1 > 192.168.1.21: ICMP host 10.254.10.140
unreachable, length 92
Tried with a different ping implementation (RouterOS) and the behaviour
seems correct:
[vihai@SevioLab SW1] > ping 10.254.10.140
HOST SIZE TTL TIME STATUS
192.168.1.1 84 64 0ms host unreachable
192.168.1.1 84 64 0ms host unreachable
192.168.1.1 84 64 0ms host unreachable
10.254.10.140 56 61 20ms
10.254.10.140 56 61 46ms
10.254.10.140 56 61 37ms
192.168.1.1 84 64 0ms host unreachable
192.168.1.1 84 64 0ms host unreachable
192.168.1.1 84 64 0ms host unreachable
sent=9 received=3 packet-loss=66% min-rtt=20ms avg-rtt=34ms max-rtt=46ms
Recently I was pinging with IPv6, a router in between filtered the
packet, however the shown source address was not the right one:
root@monitor:~# ping6 -i 0.2 www.google.com
PING www.google.com(mil01s25-in-x04.1e100.net) 56 data bytes
From mil01s25-in-x04.1e100.net icmp_seq=1 Destination unreachable: No route
From mil01s25-in-x04.1e100.net icmp_seq=2 Destination unreachable: No route
From mil01s25-in-x04.1e100.net icmp_seq=3 Destination unreachable: No route
19:33:19.589285 IP6 2a01:2d8:aca0:fce:944e:c8ff:fe4d:96de >
mil01s25-in-x04.1e100.net: ICMP6, echo request, seq 1, length 64
19:33:19.611666 IP6 mix-br2.intercom.it >
2a01:2d8:aca0:fce:944e:c8ff:fe4d:96de: ICMP6, destination unreachable,
unreachable route mil01s25-in-x04.1e100.net, length 112
Bye,
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^ permalink raw reply [flat|nested] 6+ messages in thread* Re: Issue with ping source address display
2016-04-12 17:52 Issue with ping source address display Daniele Orlandi
@ 2016-04-12 19:38 ` Julian Anastasov
2016-04-12 19:47 ` Daniele Orlandi
2016-04-12 22:59 ` 吉藤英明
1 sibling, 1 reply; 6+ messages in thread
From: Julian Anastasov @ 2016-04-12 19:38 UTC (permalink / raw)
To: Daniele Orlandi; +Cc: netdev
Hello,
On Tue, 12 Apr 2016, Daniele Orlandi wrote:
> I noticed that when ping receives ICMP messages from different sources
> the first IP address is always used and displayed:
>
>
> vihai@seviolab:~$ ping -V
> ping utility, iputils-s20121221
What is the kernel version?
Regards
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Issue with ping source address display
2016-04-12 19:38 ` Julian Anastasov
@ 2016-04-12 19:47 ` Daniele Orlandi
2016-04-12 20:27 ` Julian Anastasov
0 siblings, 1 reply; 6+ messages in thread
From: Daniele Orlandi @ 2016-04-12 19:47 UTC (permalink / raw)
To: Julian Anastasov; +Cc: netdev
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On 12/04/2016 21:38, Julian Anastasov wrote:
>
> Hello,
>
> On Tue, 12 Apr 2016, Daniele Orlandi wrote:
>
>> I noticed that when ping receives ICMP messages from different sources
>> the first IP address is always used and displayed:
>>
>>
>> vihai@seviolab:~$ ping -V
>> ping utility, iputils-s20121221
>
> What is the kernel version?
Much time passed and I don't remember, however the latest test with IPv6
ping was made on this host:
root@monitor:~# uname -a
Linux monitor 4.4.0-17-generic #33-Ubuntu SMP Tue Mar 29 17:17:28 UTC
2016 x86_64 x86_64 x86_64 GNU/Linux
root@monitor:~# ping -V
ping utility, iputils-s20121221
Thanks,
--
Daniele Orlandi
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Issue with ping source address display
2016-04-12 19:47 ` Daniele Orlandi
@ 2016-04-12 20:27 ` Julian Anastasov
0 siblings, 0 replies; 6+ messages in thread
From: Julian Anastasov @ 2016-04-12 20:27 UTC (permalink / raw)
To: Daniele Orlandi; +Cc: netdev
Hello,
On Tue, 12 Apr 2016, Daniele Orlandi wrote:
> On 12/04/2016 21:38, Julian Anastasov wrote:
> >
> > What is the kernel version?
>
> Much time passed and I don't remember, however the latest test with IPv6
> ping was made on this host:
>
> root@monitor:~# uname -a
> Linux monitor 4.4.0-17-generic #33-Ubuntu SMP Tue Mar 29 17:17:28 UTC
> 2016 x86_64 x86_64 x86_64 GNU/Linux
I asked because I remember for such problem but
at the same time your first report was from Sep 2014, long
before the bad period: 4.0 - 4.1. Can you find and try
this fix from 4.2?:
commit 34b99df4e6256ddafb663c6de0711dceceddfe0e
Author: Julian Anastasov <ja@ssi.bg>
Date: Tue Jun 23 08:34:39 2015 +0300
ip: report the original address of ICMP messages
ICMP messages can trigger ICMP and local errors. In this case
serr->port is 0 and starting from Linux 4.0 we do not return
the original target address to the error queue readers.
Add function to define which errors provide addr_offset.
With this fix my ping command is not silent anymore.
Because I'm not sure if your kernel includes it.
I also remember that the ping utility can use random memory
when such 4.0/4.1 kernel returns msg_namelen=0:
http://marc.info/?l=linux-netdev&m=143509000420707&w=2
Thread:
http://marc.info/?t=143503781500001&r=1&w=2
Regards
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Issue with ping source address display
2016-04-12 17:52 Issue with ping source address display Daniele Orlandi
2016-04-12 19:38 ` Julian Anastasov
@ 2016-04-12 22:59 ` 吉藤英明
1 sibling, 0 replies; 6+ messages in thread
From: 吉藤英明 @ 2016-04-12 22:59 UTC (permalink / raw)
To: Daniele Orlandi; +Cc: network dev
Hi,
2016-04-13 2:52 GMT+09:00 Daniele Orlandi <daniele@orlandi.com>:
>
> Hello,
>
> More than one year ago I posted the following message but it hasn't
> received a reply, now I've been stung by a similar issue, you may want
> to investigate:
>
>
> I noticed that when ping receives ICMP messages from different sources
> the first IP address is always used and displayed:
>
>
> vihai@seviolab:~$ ping -V
> ping utility, iputils-s20121221
>
> This is a (simulated) flapping route:
>
> vihai@seviolab:~$ ping 10.254.10.140
> PING 10.254.10.140 (10.254.10.140) 56(84) bytes of data.
> From 192.168.1.1 icmp_seq=1 Destination Host Unreachable
> From 192.168.1.1 icmp_seq=2 Destination Host Unreachable
> From 192.168.1.1 icmp_seq=3 Destination Host Unreachable
> 64 bytes from 192.168.1.1: icmp_seq=4 ttl=61 time=24.7 ms
> 64 bytes from 192.168.1.1: icmp_seq=5 ttl=61 time=25.6 ms
> 64 bytes from 192.168.1.1: icmp_seq=6 ttl=61 time=69.6 ms
> From 192.168.1.1 icmp_seq=7 Destination Host Unreachable
> From 192.168.1.1 icmp_seq=8 Destination Host Unreachable
> From 192.168.1.1 icmp_seq=9 Destination Host Unreachable
> ^C
> --- 10.254.10.140 ping statistics ---
> 9 packets transmitted, 3 received, +6 errors, 66% packet loss, time 8001ms
> rtt min/avg/max/mdev = 24.797/40.061/69.692/20.955 ms
>
>
> The sources, however are different:
>
> vihai@seviolab:~$ sudo tcpdump -n icmp
> tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
> listening on eth0, link-type EN10MB (Ethernet), capture size 65535 bytes
> ^[OA^[OA^[OA17:09:55.932981 IP 192.168.1.21 > 10.254.10.140: ICMP echo
> request, id 9278, seq 1, length 64
> 17:09:55.933234 IP 192.168.1.1 > 192.168.1.21: ICMP host 10.254.10.140
> unreachable, length 92
> 17:09:56.933169 IP 192.168.1.21 > 10.254.10.140: ICMP echo request, id
> 9278, seq 2, length 64
> 17:09:56.933416 IP 192.168.1.1 > 192.168.1.21: ICMP host 10.254.10.140
> unreachable, length 92
> 17:09:57.933160 IP 192.168.1.21 > 10.254.10.140: ICMP echo request, id
> 9278, seq 3, length 64
> 17:09:57.933404 IP 192.168.1.1 > 192.168.1.21: ICMP host 10.254.10.140
> unreachable, length 92
> 17:09:58.933163 IP 192.168.1.21 > 10.254.10.140: ICMP echo request, id
> 9278, seq 4, length 64
> 17:09:58.957939 IP 10.254.10.140 > 192.168.1.21: ICMP echo reply, id
> 9278, seq 4, length 64
> 17:09:59.935050 IP 192.168.1.21 > 10.254.10.140: ICMP echo request, id
> 9278, seq 5, length 64
> 17:09:59.960724 IP 10.254.10.140 > 192.168.1.21: ICMP echo reply, id
> 9278, seq 5, length 64
> 17:10:00.936177 IP 192.168.1.21 > 10.254.10.140: ICMP echo request, id
> 9278, seq 6, length 64
> 17:10:01.005849 IP 10.254.10.140 > 192.168.1.21: ICMP echo reply, id
> 9278, seq 6, length 64
> 17:10:01.936313 IP 192.168.1.21 > 10.254.10.140: ICMP echo request, id
> 9278, seq 7, length 64
> 17:10:01.936626 IP 192.168.1.1 > 192.168.1.21: ICMP host 10.254.10.140
> unreachable, length 92
> 17:10:02.935321 IP 192.168.1.21 > 10.254.10.140: ICMP echo request, id
> 9278, seq 8, length 64
> 17:10:02.935591 IP 192.168.1.1 > 192.168.1.21: ICMP host 10.254.10.140
> unreachable, length 92
> 17:10:03.934322 IP 192.168.1.21 > 10.254.10.140: ICMP echo request, id
> 9278, seq 9, length 64
> 17:10:03.934613 IP 192.168.1.1 > 192.168.1.21: ICMP host 10.254.10.140
> unreachable, length 92
>
Thank you for your report. I'll try fixing it.
--yoshfuji
>
>
>
> Tried with a different ping implementation (RouterOS) and the behaviour
> seems correct:
>
> [vihai@SevioLab SW1] > ping 10.254.10.140
> HOST SIZE TTL TIME STATUS
> 192.168.1.1 84 64 0ms host unreachable
> 192.168.1.1 84 64 0ms host unreachable
> 192.168.1.1 84 64 0ms host unreachable
> 10.254.10.140 56 61 20ms
> 10.254.10.140 56 61 46ms
> 10.254.10.140 56 61 37ms
> 192.168.1.1 84 64 0ms host unreachable
> 192.168.1.1 84 64 0ms host unreachable
> 192.168.1.1 84 64 0ms host unreachable
> sent=9 received=3 packet-loss=66% min-rtt=20ms avg-rtt=34ms max-rtt=46ms
>
>
> Recently I was pinging with IPv6, a router in between filtered the
> packet, however the shown source address was not the right one:
>
> root@monitor:~# ping6 -i 0.2 www.google.com
> PING www.google.com(mil01s25-in-x04.1e100.net) 56 data bytes
> From mil01s25-in-x04.1e100.net icmp_seq=1 Destination unreachable: No route
> From mil01s25-in-x04.1e100.net icmp_seq=2 Destination unreachable: No route
> From mil01s25-in-x04.1e100.net icmp_seq=3 Destination unreachable: No route
>
> 19:33:19.589285 IP6 2a01:2d8:aca0:fce:944e:c8ff:fe4d:96de >
> mil01s25-in-x04.1e100.net: ICMP6, echo request, seq 1, length 64
> 19:33:19.611666 IP6 mix-br2.intercom.it >
> 2a01:2d8:aca0:fce:944e:c8ff:fe4d:96de: ICMP6, destination unreachable,
> unreachable route mil01s25-in-x04.1e100.net, length 112
>
>
> Bye,
>
^ permalink raw reply [flat|nested] 6+ messages in thread
* Issue with ping source address display
@ 2014-09-16 16:01 Daniele Orlandi
0 siblings, 0 replies; 6+ messages in thread
From: Daniele Orlandi @ 2014-09-16 16:01 UTC (permalink / raw)
To: netdev
Hello,
I noticed that when ping receives ICMP messages from different sources
the first IP address is always used and displayed:
vihai@seviolab:~$ ping -V
ping utility, iputils-s20121221
This is a (simulated) flapping route:
vihai@seviolab:~$ ping 10.254.10.140
PING 10.254.10.140 (10.254.10.140) 56(84) bytes of data.
From 192.168.1.1 icmp_seq=1 Destination Host Unreachable
From 192.168.1.1 icmp_seq=2 Destination Host Unreachable
From 192.168.1.1 icmp_seq=3 Destination Host Unreachable
64 bytes from 192.168.1.1: icmp_seq=4 ttl=61 time=24.7 ms
64 bytes from 192.168.1.1: icmp_seq=5 ttl=61 time=25.6 ms
64 bytes from 192.168.1.1: icmp_seq=6 ttl=61 time=69.6 ms
From 192.168.1.1 icmp_seq=7 Destination Host Unreachable
From 192.168.1.1 icmp_seq=8 Destination Host Unreachable
From 192.168.1.1 icmp_seq=9 Destination Host Unreachable
^C
--- 10.254.10.140 ping statistics ---
9 packets transmitted, 3 received, +6 errors, 66% packet loss, time 8001ms
rtt min/avg/max/mdev = 24.797/40.061/69.692/20.955 ms
The sources, however are different:
vihai@seviolab:~$ sudo tcpdump -n icmp
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth0, link-type EN10MB (Ethernet), capture size 65535 bytes
^[OA^[OA^[OA17:09:55.932981 IP 192.168.1.21 > 10.254.10.140: ICMP echo
request, id 9278, seq 1, length 64
17:09:55.933234 IP 192.168.1.1 > 192.168.1.21: ICMP host 10.254.10.140
unreachable, length 92
17:09:56.933169 IP 192.168.1.21 > 10.254.10.140: ICMP echo request, id
9278, seq 2, length 64
17:09:56.933416 IP 192.168.1.1 > 192.168.1.21: ICMP host 10.254.10.140
unreachable, length 92
17:09:57.933160 IP 192.168.1.21 > 10.254.10.140: ICMP echo request, id
9278, seq 3, length 64
17:09:57.933404 IP 192.168.1.1 > 192.168.1.21: ICMP host 10.254.10.140
unreachable, length 92
17:09:58.933163 IP 192.168.1.21 > 10.254.10.140: ICMP echo request, id
9278, seq 4, length 64
17:09:58.957939 IP 10.254.10.140 > 192.168.1.21: ICMP echo reply, id
9278, seq 4, length 64
17:09:59.935050 IP 192.168.1.21 > 10.254.10.140: ICMP echo request, id
9278, seq 5, length 64
17:09:59.960724 IP 10.254.10.140 > 192.168.1.21: ICMP echo reply, id
9278, seq 5, length 64
17:10:00.936177 IP 192.168.1.21 > 10.254.10.140: ICMP echo request, id
9278, seq 6, length 64
17:10:01.005849 IP 10.254.10.140 > 192.168.1.21: ICMP echo reply, id
9278, seq 6, length 64
17:10:01.936313 IP 192.168.1.21 > 10.254.10.140: ICMP echo request, id
9278, seq 7, length 64
17:10:01.936626 IP 192.168.1.1 > 192.168.1.21: ICMP host 10.254.10.140
unreachable, length 92
17:10:02.935321 IP 192.168.1.21 > 10.254.10.140: ICMP echo request, id
9278, seq 8, length 64
17:10:02.935591 IP 192.168.1.1 > 192.168.1.21: ICMP host 10.254.10.140
unreachable, length 92
17:10:03.934322 IP 192.168.1.21 > 10.254.10.140: ICMP echo request, id
9278, seq 9, length 64
17:10:03.934613 IP 192.168.1.1 > 192.168.1.21: ICMP host 10.254.10.140
unreachable, length 92
Tried with a different ping implementation (RouterOS) and the behaviour
seems correct:
[vihai@SevioLab SW1] > ping 10.254.10.140
HOST SIZE TTL TIME STATUS
192.168.1.1 84 64 0ms host unreachable
192.168.1.1 84 64 0ms host unreachable
192.168.1.1 84 64 0ms host unreachable
10.254.10.140 56 61 20ms
10.254.10.140 56 61 46ms
10.254.10.140 56 61 37ms
192.168.1.1 84 64 0ms host unreachable
192.168.1.1 84 64 0ms host unreachable
192.168.1.1 84 64 0ms host unreachable
sent=9 received=3 packet-loss=66% min-rtt=20ms avg-rtt=34ms
max-rtt=46ms
I think you may be interested as this issue caught me in a
troubleshooting session introducing strangeness and might do the same to
you too :)
Bye,
^ permalink raw reply [flat|nested] 6+ messages in thread
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2016-04-12 17:52 Issue with ping source address display Daniele Orlandi
2016-04-12 19:38 ` Julian Anastasov
2016-04-12 19:47 ` Daniele Orlandi
2016-04-12 20:27 ` Julian Anastasov
2016-04-12 22:59 ` 吉藤英明
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2014-09-16 16:01 Daniele Orlandi
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