From: Scott M. Livingston (scottl@sprinthosting.net)
Date: Thu Feb 27 2003 - 17:33:19 GMT-3
Very nice! Very nice indeed! Thank You!
Scott
-----Original Message-----
From: ccie2be [mailto:ccie2be@nyc.rr.com]
Sent: Thursday, February 27, 2003 2:16 PM
To: Group Study; Scott M. Livingston
Subject: Re: NTP Clarification
Hey Scott,
Here are a couple of additional things t keep in mind re:NTP
1) Before NTP will work, the router must have it's clock set.
2) On a LAN, u can config the NTP master to broadcast NTP pkts w/
interface
command: ntp broadcast and have routers recieve these pkts w/ interface
command: ntp broadcast client
3) NTP pkts can (or should) be authenticated with keys
rtrA-------------------------rtrB
NTP master----------------NTP server
1.1.1.1
rtr A config:
ntp master
ntp authentication-key <#> md5 <secret-password>
ntp authenticate
ntp trusted-key <#>
rtrB
ntp server 1.1.1.1 key <#>
ntp authenticate-key <#> md5 <secret-password>
ntp authenticate
ntp trusted-key <#>
Notice that except for the 1st line, the 3 other commands are the same.
And, try to remember that the ntp server x.x.x.x command points to the
address of the server which in this case is the master source. ( I
often
forget so I figure if I tell you, maybe, with any luck, I'll remember
that
myself.)
Hope this is useful.
Jim
----- Original Message -----
From: "Scott M. Livingston" <scottl@sprinthosting.net>
To: <ccielab@groupstudy.com>
Sent: Thursday, February 27, 2003 11:50 AM
Subject: RE: NTP Clarification
> Option #2 I meant that if R1 is configured as such it will be able to
> receive time not give it to 5.5.5.1. Sorry about that.
>
> Scott
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
Of
> Scott.M.Livingston@mail.sprint.com
> Sent: Thursday, February 27, 2003 9:09 AM
> To: ccielab@groupstudy.com
> Subject: NTP Clarification
>
> I need to get in the lab tonight and nail this down I have only
touched
> on it. Please correct me if I am wrong. This is what I understand.
>
> A router configured as such:
>
> R1
> !
> ntp peer 5.5.5.1 <-- Means that R1 can give and receive time from
> 5.5.5.1.
> !
> #########
>
> A router configured as such:
>
> R1
> !
> ntp server 5.5.5.1 <-- Means that R1 can give, but not receive time
from
>
> 5.5.5.1
> !
>
> ##########
>
> A router configured as such:
>
> R1
> !
> ntp master <-- Any router setup with a peer or server statement
> pointing to this R1 can get time from it.
> !
>
> ###########
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