[Gllug] Pinging a machine that is down

[Jon Fautley]

On Mon, 11 Jan 2010 17:31:26 +0000
Alain Williams <addw at phcomp.co.uk> wrote:

> tcpdump shows:
> 	17:27:10.111651 arp who-has machine-that-is-down tell
> mint.phcomp.co.uk 17:27:11.111570 arp who-has machine-that-is-down
> tell mint.phcomp.co.uk 17:27:12.112491 arp who-has
> machine-that-is-down tell mint.phcomp.co.uk 17:27:13.112415 arp
> who-has machine-that-is-down tell mint.phcomp.co.uk 17:27:14.112341
> arp who-has machine-that-is-down tell mint.phcomp.co.uk
> 17:27:15.112263 arp who-has machine-that-is-down tell
> mint.phcomp.co.uk 17:27:16.112189 arp who-has machine-that-is-down
> tell mint.phcomp.co.uk 17:27:17.112111 arp who-has
> machine-that-is-down tell mint.phcomp.co.uk 17:27:19.111959 arp
> who-has machine-that-is-down tell mint.phcomp.co.uk 17:27:20.111883
> arp who-has machine-that-is-down tell mint.phcomp.co.uk
> 17:27:21.111808 arp who-has machine-that-is-down tell
> mint.phcomp.co.uk 17:27:23.111656 arp who-has machine-that-is-down
> tell mint.phcomp.co.uk 17:27:24.111578 arp who-has
> machine-that-is-down tell mint.phcomp.co.uk 17:27:25.111504 arp
> who-has machine-that-is-down tell mint.phcomp.co.uk 17:27:27.111351
> arp who-has machine-that-is-down tell mint.phcomp.co.uk
> 
> Note the timing, 3 then a gap repeated.

yes, it's the arp timeout - exactly as Christof's post said :)

Cheers,

Jon
-- 
Jon Fautley RHCE, RHCDS, RHCX, RHCA  email: jfautley at redhat.com
Senior Consultant                    cell :     +44 7841 558683
Global Professional Services
Red Hat UK, 200 Fowler Avenue, Farnborough, Hampshire, GU14 7JP
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