From: McNeace, Roger (RMcNeace@ciena.com)
Date: Fri Oct 08 2004 - 10:30:15 GMT-3
If you have local Internet access at site A and B just sync to a regional public NTP server.
http://ntp.isc.org/bin/view/Servers/StratumOneTimeServers
If you need really accurate time think about getting either a GPS or CDMA timing device.
Networkers Presentation on Accurate Timinig
https://www.networkers04.com/published/NMS-1N03/NMS-1N03.pdf
Roger McNeace
Senior Network Engineer
Ciena Corporation
rmcneace@ciena.com
410-694-5805
CCIE #12777
-----Original Message-----
From: wing_lam@jossynergy.com [mailto:wing_lam@jossynergy.com]
Sent: Friday, October 08, 2004 3:32 AM
To: ccielab@groupstudy.com
Subject: NTP question
Dear Group,
I have a two site A & B in two cities, connected through oversea ISDN. Site B is stub that no Internet access.
Also, as the ISDN is expensive so I don't want site B router sync it's time to site A through ISDN, it will make the ISDN keep up and down. But it is a must to make the router has a precise time as the access-list inside are reference to the time based access-list.
i) How can I configure the NTP so that once it is synced, no more packets send?
ii) Any suggested time source (may be a software in a WIN 2000 PC, or a simple device that plugs into the network) for our router to sync to in site B? Can this device becomes a time source (ntp master) and provide time service but no need to reference to another outside time source?
Thanks,
BBD
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Thank you.
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