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On 2/6/2011 7:29 PM, George Bonser wrote:
<blockquote
cite="mid:5A6D953473350C4B9995546AFE9939EE0BC138AB@RWC-EX1.corp.seven.com"
type="cite"><br>
<pre wrap="">I have an upstream announcing >3500 /30 and /32 to me by BGP even though
they are part of larger aggregates that I hear from no other source
(aggregates smaller than /24). I called them on Friday about it
thinking maybe I would give them a "heads up" thinking maybe their
aggregation was broken. They told me that was intentional. So I am now
filtering them.
</pre>
</blockquote>
<br>
Some policies are strange. To be honest, though, /24 is the standard
unless you're receiving directly from your transit, and while I know
there are quite a few networks (unfortunately some of the largest)
which deaggregate on a massive scale, I would say that most ASNs
advertise at the highest aggregation possible.<br>
<br>
I'm personally sad that I'm having to start advertising 5 new /23
routes as 2 of my ISP customers are multihoming and aren't
aggregated (IPv4 didn't allow for any growth when I assigned to
them).<br>
<br>
Thanks for reminding me to check, though. I screwed a bgp config up.
Currently (and never do this, I just haven't finished fixing it), I
flag to not send routes out (instead of flagging to send them), and
a screwup deaggregated a route.<br>
<br>
<pre><font color="red">67.207.230.0/23 4777 2516 3356 8025 - Withdrawn - matching aggregate 67.207.224.0/19 4777 2516 3356 8025</font>
^--- errr, neighbor x.x.x.x send-communities please. :)
Jack
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