From: Roberto Fernandez (rofernandez@us.telefonica.com)
Date: Mon Jun 12 2006 - 18:53:51 ART
Friends,
I need your help trying to figure out, where are the key works which led
into one direction or the other.
The requirements of IEWB Vol 1, Lab 1, Session 9.3 are as follows:
-Configure R3 and R6 to get network time from BB3 and BB1 respectively
-Configure R1, R2 and SW1 to get network time from R3
-Configure R4, R5, and SW2 to get network time from R6
-R3 should fail over and get network time from R6 in the event that BB3
becomes unavailable
-R6 should fail over and get network time from R3 in the event that BB1
becomes unavailable
Here I see two solutions to fulfill the last two requirements,
1- The "ntp peer"
2- The "ntp server" (taking the precaution of adding the preferred
keyword to the server commands pointing to BB1 and BB3
Configuration for #1
--------------------
R3
ntp server <BB1 ip address> preferred
ntp peer <R6 ip address>
R6
ntp server <BB2 ip address> preferred
Configuration for #2
--------------------
R3
ntp server <BB1 ip address> preferred
ntp server <R6 ip address>
R6
ntp server <BB2 ip address> preferred
ntp server <R3 ip address>
The answer key prefers #1 and it also the choice for some other similar
questions. Maybe I'm lost on the semantics of the requirement so I'd
appreciate if someone can point to the keywords which lead to the right
solution.
Thanks again
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