nanog mailing list archives

Re: Anyone seeing ping corruption?


From: Jon Lewis <jlewis () lewis org>
Date: Mon, 20 Dec 2021 17:13:50 -0500 (EST)

On Sun, 19 Dec 2021, J Doe wrote:

 8.8.8.8 truncates ICMP's responses, this is well known. Different
 platforms will react differently to it.

 lukas@dev:~$ ping 8.8.8.8 -c1 -s1000
 PING 8.8.8.8 (8.8.8.8) 1000(1028) bytes of data.
 76 bytes from 8.8.8.8: icmp_seq=1 ttl=116 (truncated)

 --- 8.8.8.8 ping statistics ---
 1 packets transmitted, 1 received, 0% packet loss, time 0ms
 rtt min/avg/max/mdev = 5.657/5.657/5.657/0.000 ms
 lukas@dev:~$ ping 1.1.1.1 -c1 -s1000
 PING 1.1.1.1 (1.1.1.1) 1000(1028) bytes of data.
 1008 bytes from 1.1.1.1: icmp_seq=1 ttl=58 time=15.8 ms

 --- 1.1.1.1 ping statistics ---
 1 packets transmitted, 1 received, 0% packet loss, time 0ms
 rtt min/avg/max/mdev = 15.893/15.893/15.893/0.000 ms
 lukas@dev:~$

Hi,

Out of curiosity - does anyone know why Google is truncating ICMP responses ?

My guess would be to reduce "garbage traffic bandwidth". They're running an open resolver...not a lighthouse.

----------------------------------------------------------------------
 Jon Lewis, MCP :)           |  I route
 StackPath, Sr. Neteng       |  therefore you are
_________ http://www.lewis.org/~jlewis/pgp for PGP public key_________


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