Re: ping -s 6546[5-8]

Harald Koenig (koenig@tat.physik.uni-tuebingen.de)
Thu, 23 Jul 1998 20:07:43 +0200


On Jul 23, Jan Kneschke wrote:

> i just did an ping to my second computer to find out what the highest value
> for the packetsize is.

I was curious how this is working (using 2.0.34!) using local connection
and here any paket size larger than 24372 won't work at all:

# ping -s 24372 localhost
PING localhost (127.0.0.1): 24372 data bytes
24380 bytes from 127.0.0.1: icmp_seq=0 ttl=64 time=11.0 ms
24380 bytes from 127.0.0.1: icmp_seq=1 ttl=64 time=10.3 ms
24380 bytes from 127.0.0.1: icmp_seq=2 ttl=64 time=11.6 ms
24380 bytes from 127.0.0.1: icmp_seq=3 ttl=64 time=9.9 ms
24380 bytes from 127.0.0.1: icmp_seq=4 ttl=64 time=9.8 ms

--- localhost ping statistics ---
5 packets transmitted, 5 packets received, 0% packet loss
round-trip min/avg/max = 9.8/10.5/11.6 ms
# ping -s 24373 localhost
PING localhost (127.0.0.1): 24373 data bytes

--- localhost ping statistics ---
7 packets transmitted, 0 packets received, 100% packet loss

any idea what's the reason for this limit ?

Harald

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