You are going to run into some serious problems.<br><br>Not that the idea isn't sound, I am just concerned about your DHCP scope and how you are going to get chunks of phones to register to the new cluster and the old with the same DHCP Option 150 address (you could manually change the tftp on the phones, but that seems time consuming)... Also, you run the risk of having a discontiguous dial-plan (where 12XX are on the old cluster, yet 123X are on the new, etc.).
<br><br>You will also run into licensing issues (if you use DMA, you can get a license automatically for free, if you don't, you have to buy one...)<br><br>Just stuff you want to keep in mind.<br><br>What I might suggest instead is to drop in a second server, install
5.0(4) using the DMA (so the old database is fully migrated). And then slowly move phones over (chunk by chunk in their original DHCP scope (just change opt 150 and reboot the phone). If it fails (for whatever reason), change the DHCP back and reboot them again.
<br><br>If you have MGCP gateways, it won't be simple to get them to change back if the system catastrophically fails, but it will be better than attempting an onbox upgrade.<br><br><br><br>Jonathan<br><br><div><span class="gmail_quote">
On 11/24/06, <b class="gmail_sendername">Nick Kassel</b> <<a href="mailto:Nick.Kassel@charles-stanley.co.uk">Nick.Kassel@charles-stanley.co.uk</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div link="blue" vlink="purple" lang="EN-GB">
<div>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">When migrating from a 4.1(3) cluster to 5.04, is it possible
to do this in a staged way, Ideally we would like to install a cluster of
version 5 servers with an ICT between the 2 clusters and slowly migrate users
across, stage by stage. E.g. one remote site at a time. Hopefully causing us
less issues.</span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;"> </span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">But what I seem to have read suggests running the DMA and
then copying all the license files for the phones in one go to the new cluster,
if I do this can I still run the 2 clusters together. If not there must
be another way to do this as I can't believe that you have to migrate
across all or nothing at all.</span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;"> </span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">Has anyone done anything similar or can point me in the
direction of any further info regarding migrations.</span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;"> </span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;"> </span></font></p>
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