Completely unrelated to your question, but rather than using 1.2.3.0 or similar networks for examples like this, keep in mind that there's a dedicated range allocated for "documentation and examples" - <a href="http://192.0.2.0/24">192.0.2.0/24</a><br>
<br>There are also corresponding domains <a href="http://example.com">example.com</a>, <a href="http://example.net">example.net</a> and <a href="http://example.org">example.org</a> (These domains do actually exist, but just point to IANA to when points to the relevant RFC)<br>
<br> Scott<br><br><br><br><div class="gmail_quote">On Mon, Dec 3, 2012 at 6:55 AM, Shaun Deans <span dir="ltr"><<a href="mailto:shaun@kadeo.com.au" target="_blank">shaun@kadeo.com.au</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Morning Noggers ?<br>
<br>
I'm looking for some quick feedback on what peoples BCP (Best Common<br>
Practice) is when it comes to unused ip space. For example if you have<br>
the ip range <a href="http://1.2.3.0/24" target="_blank">1.2.3.0/24</a> and you only have <a href="http://1.2.3.0/25" target="_blank">1.2.3.0/25</a> active/routed<br>
what do you do with <a href="http://1.2.3.128/25" target="_blank">1.2.3.128/25</a>.<br>
<br>
I have seen many techniques including:<br>
- ACLs (Bad IMHO as it requires CPU cycles)<br>
- Tying to a Loopback (Bad: Leaves ip's open on router which require acls/cpu)<br>
- Null routing ( would be my pick)<br>
- Nothing at all (Very Bad as it would bubble up causing routing loops)<br>
<br>
Gave it a google and there were no real BCP's that stood out so im<br>
interested to hear what everyone else does ?<br>
<br>
Cheers<br>
<br>
S<br>
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