[ntp:questions] why does asterisk still show after the ntp server is shutdown?
david at ex.djwhome.demon.invalid
Fri Nov 16 22:14:56 UTC 2012
> The next router upstream will send an ICMP "destination unreachable"
> when it cannot resolve the IP address into a hardware address, which
> normally happens when it gets no reply to its ARP requests.
Only once the ARP cache times out, and only if the link level protocol
> However, those ICMP "destination unreachable" are often ignored by
> applications, including ntpd. Some people even block them at their
They are difficult to handle for UDP based protocols, as the application
has to specifically receive them and to correlate them with the specific
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