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<div class="moz-cite-prefix">On 24/06/2015 2:25 PM, Tim Raphael
wrote:<br>
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cite="mid:CAC3RH9o1+9Nyu6m7CudDr6=c0qN4G-cdGo-78tqUgJxROFOEPg@mail.gmail.com"
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<div class="gmail_quote">On Wed, Jun 24, 2015 at 12:09 PM,
Mark Newton <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:newton@atdot.dotat.org" target="_blank">newton@atdot.dotat.org</a>></span>
wrote:<br>
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<br>
If you aren't provider-diverse, you aren't diverse.<br>
<span class="HOEnZb"><font color="#888888"><br>
- mark<br>
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<div>And ideally location diverse too for the purposes of
DR. The latency between Sydney and Melbourne for a lot of
our customers is so negligible at the application layer
that they buy two vDCs, one in each of our Availability
Zones and connect them together via our MPLS services.
Each zone in our case is completely independent at the
infrastructure level.</div>
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<br>
Are the zones monitored by independent NOCs, and operated by
completely diverse NOC engineers so the same finger-fumble or
automated provisioning tool can't be applied to configs in both
locations?<br>
<br>
I've seen someone press 'commit' to a router config script with a
typo that proceeded to take down approx. 45 routers across
20-something countries. Each country was completely independent at
the infrastructure level then, too.<br>
<br>
+1 What Mark said above. If your multiple diverse services stem
ultimately from the same boardroom table, you aren't diverse.<br>
<br>
Paul.<br>
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