[nsp] ios ntp

Marcus Keane mkeane at microsoft.com
Tue Aug 5 09:38:29 EDT 2003

Firstly, I'm not an expert in NTP so bear with me. But the problem is
that it is built into the design of NTP that a server can lose
connectivity to it's upstream server for 24hrs and still have downstream
clients pass sanity check 6. So in the case of the router/server that
has synchronised within 24hrs it will serve and the downstream
client(router?) sanity checks will pass. 

But if your router/server hasn't synced ever or within 24hrs then it
will still serve but these packets will fail sanity checks on the
downstream client.

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Tomas Daniska
Sent: Tuesday, 5 August 2003 01:36
To: cisco-nsp at puck.nether.net
Subject: [nsp] ios ntp

hi there,

is anyone aware if it's possible to set ios built-in ntp server to serve
only if it is synchronized to a higher-stratum peer?


Tomas Daniska
systems engineer
Tronet Computer Networks
Plynarenska 5, 829 75 Bratislava, Slovakia
tel: +421 2 58224111, fax: +421 2 58224199
A transistor protected by a fast-acting fuse will protect the fuse by
blowing first.

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