<html><head><meta http-equiv="Content-Type" content="text/html charset=windows-1252"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><br class=""><div><blockquote type="cite" class=""><div class="">On Aug 11, 2015, at 19:47 , Tom Samplonius <<a href="mailto:tsamplonius@ubn.ca" class="">tsamplonius@ubn.ca</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><meta http-equiv="Content-Type" content="text/html charset=windows-1252" class=""><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><br class=""><div class=""><blockquote type="cite" class=""><div class="">On Aug 11, 2015, at 7:36 PM, Paul <<a href="mailto:pmcnary@cameron.net" class="">pmcnary@cameron.net</a>> wrote:</div><br class="Apple-interchange-newline"><div class="">
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<div class="moz-cite-prefix">Hello<br class="">
<br class="">
We are getting ready to lose a /22 and /23 and 2 /24's when we
switch from microwave data center providers<br class="">
to fiber for our ISP that the data centers have been providing for
us since the dial-up days .<br class="">
/22 and /23 are no longer available. Will we have to pay the $100
annual fee on each /24 block allocated<br class="">
even though nothing larger is available? Can we get an IPv6
allocation large enough when we file for AS number<br class="">
for a several month cross over from microwave to fiber?<br class=""></div></div></div></blockquote><br class=""></div><div class=""><br class=""></div><div class=""> Keep in mind that a IPv6 /32 or /36 are very large blocks in comparison to a /21 worth of IPv4.</div><div class=""><br class=""></div><div class=""> A /32 allows you to assign a /64 each to about 4 billion customers.</div></div></div></blockquote><div><br class=""></div><div>That’s really not a good idea in most cases.</div><div><br class=""></div><div>For the most part, you should be assigning /48s to each customer end site. Some customers may have</div><div>multiple end sites (more than one building, for example).</div><div><br class=""></div><div>Still, a /36 is enough to assign 4096 /48s and a /32 is 65,536 /48s, so they are still significantly larger</div><div>than a /21 of IPv4.</div><div><br class=""></div><div>Owen</div><div><br class=""></div></div><div><br class=""></div></body></html>