RE: NTP PEER question!

Hussam,

Not always Cisco press books offer the best solution. I usually
recommend the following chapter of the "Hardening" book to my R&S
students :

http://oreilly.com/catalog/hardcisco/chapter/ch10.html

As you see it's perfectly described in that book:

Client
    An NTP client is configured to let its clock be set and synchronized
by an external NTP timeserver. NTP clients can be configured to use
multiple servers to set their local time and are able to give preference
to the most accurate time sources. They will not, however, provide
synchronization services to any other devices.

Server
    An NTP server is configured to synchronize NTP clients. Servers can
be configured to synchronize any client or only specific clients. NTP
servers, however, will accept no synchronization information from their
clients and therefore will not let clients update or affect the server's
time settings.

Peer
    With NTP peers, one NTP-enabled device does not have authority over
the other. With the peering model, each device shares its time
information with the other, and each device can also provide time
synchronization to the other.

Please read the whole section.

Moreover, if you have any last minute questions feel free to contact me
off-list anytime.

HTH

--------------------------
Kambiz Agahian
CCIE (R&S), CCSI, WAASSE, RSSSE
Technical Instructor
CCBOOTCAMP - Cisco Learning Solutions Partner (CLSP)
Email: kagahian_at_ccbootcamp.com
Toll Free: 877-654-2243
International: +1-702-968-5100
Skype: skype:ccbootcamp?call
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-----Original Message-----
From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
Hussam EL Kebbi
Sent: Tuesday, May 25, 2010 10:33 AM
To: ccielab_at_groupstudy.com
Subject: NTP PEER question!

Hi Experts,
I am confused of when we need to use the peer keyword in NTP:checked:
https://www.cisco.com/en/US/docs/ios/12_2/configfun/command/reference/fr
f012.
html#wp1122955
But still if I only want to synchronize R1 with server R2, I only
need:R1: ntp
server R1(IP add of R1)R2: ntp master
so when do I need to use ntp peer .... ?

Moreover I have my first Mock lab v4 R&S this Sat, any advice.

Thanks,
Received on Tue May 25 2010 - 13:01:06 ART