noob action 1. They block / null route valid public addresses but don't follow rir / relevant internet updates on used addressing space. if you block it, be sure to unblock it when time is right. <div>noob action 2. They use valid public addresses inside rather then rfc1918 space. <- If your this type of noob, the noob monster is coming for you.</div>
<div><br></div><div><div>May the noob monster be blackholio your routes. </div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Mon, Dec 3, 2012 at 10:55 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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</blockquote></div><br></div>