Mike,

You have a few things incorrect, but first let me point you to the STP 
Implementation Guide (Mar 31, 2009 - latest version) - section 1.3 
(Configuring an NTP server)
The planning guide George pointed you to is also good but does not have 
detailed Impl steps.

>From your posting I am deducing that you want to use the HMC as the NTP 
server. If you go to page 31 of the Planning guide (HMC section) you will note
>>>>>>>>>>>>>>
Eligible Hardware Management Consoles
At a minimum, management of STP-enabled servers requires HMC Application 
level V2.9.2 with latest MCL level or HMC Application level V2.10.1. The HMC 
NTP server function is only available in HMC Application level V2.10.1.
>>>>>>>>>>>>>>>>
So step 1 above is really you have to make sure that the HMC code is at 
V2.10.1 which is D73 (z10 GA1 driver).
Step 2 what you want to make sure of is that you are using the second LAN 
port of the HMC to connect to your corporate network That is the whole idea 
of the isolation. One of the LANs of the HMC connect sto the SE, the second 
LAN is used to go through the firewall to the corporate NTP server
Steps 4 and 5 I am not sure what you meant by "one HMC's NTP server" - 
these are steps from the STP panels - ETS configuratin tab and you want to 
point to the IP address of the HMC (which is going to be the NTP server for 
STP. See 1.3.3 in the Impl Guide describes this.
So, step 4 use the IP address of HMC 1 and for step 5 use IP address of HMC 2

By the way you will also note that you can configure up to two NTP servers 
on each CEC. If your PTS and BTS has connectivity to both HMCs, you can 
configure the IP addresses of both HMCs on the PTS and BTS.

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