Messages in this thread |  | | | Date | Fri, 11 Jun 1999 05:00:43 +0200 | | From | jakob@ostenfel ... | | Subject | Re: ICMP in 2.2.9 (was 3c575) |
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On Fri, Jun 11, 1999 at 03:26:56AM +0100, Alan Cox wrote: > > Can anyone confirm, that it is not possible to ping machines running > > the 2.2.9 kernel with ping packets of size 1475 ? > > Yes. Just fine. You probably have a buggy ping binary.
But it's a buggy ping binary on three different releases of redhat on four different kernels then.
I do ping -s 1475 some.host.somewhere and get no replies.
This is getting weirder by the minute... Perhaps I should get some sleep soon...
Host 1 (2.2.7, RH5.9, 3com905) Host 2 (2.2.3, RH5.2, Tulip) Host 3 (2.0.36, RH5.1, Tulip) Host 4 (2.2.9, RH6.0, Tulip)
1 2 3 4 (destination) --------------------- 1| N N N 2| Y Y Y 3| Y Y Y 4| N N N (source) Yikes. The pattern as I see it is, ping with glibc2.1 cannot send _good_ ICMP echo requests.
The really funny thing is, that where you see a `N', eg. when host 1 pings host 3, the echo request packets actually reaches host 3, but host 3 never sends a reply. (Seen with tcpdump on host 3) I guess the kernel discards the requests for some reason (??)
Unfortunately I only have RedHat boxes around here, so I can't test whether it's just RedHat's ping in 5.9 and 6.0 that's screwed, or it's the glibc. But ok, this is not a kernel issue. Darn, so close :)
Regards,
................................................................ : jakob@ostenfeld.dtu.dk : And I see the elder races, : :.........................: putrid forms of man : : Jakob Østergaard : See him rise and claim the earth, : : OZ9ABN : his downfall is at hand. : :.........................:............{Konkhra}...............: - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/
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