Re: 2.1.104-1 (and lots of older kernels): loopback mistery...

David Woodhouse (Dave@imladris.demon.co.uk)
Sun, 24 May 1998 11:49:05 +0200

vonbrand@sleipnir.valparaiso.cl said:
> When I do a:
> ping -c 1 127.0.0.1
> *two* packets are transmitted through the loopback device.

Yep. One echo request, and the echo reply that it triggers.

If you use tcpdump to watch the lo device, you'll see each packet twice - that
is two requests and two replies. That's just because tcpdump sees both
incoming and outgoing packets, not because each packet gets sent twice.

---- ---- ----
David Woodhouse, Robinson College, CB3 9AN, England. (+44) 0976 658355
Dave@imladris.demon.co.uk http://www.imladris.demon.co.uk
finger pgp@dwmw2.robinson.cam.ac.uk for PGP key.

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu