Pitfalls of annoucing /24s

McBurnett, Jim jmcburnett at msmgmt.com
Thu Oct 16 13:44:20 UTC 2003




->-----Original Message-----
->From: Phil Rosenthal [mailto:pr at isprime.com]

->As long as it's provider assigned, and your provider announces the 
->supernet that the /24 is from, it will still work.  If you 
->announce PI 
->space out of the old class A space in /24's, many networks 
->wont be able 
->to reach you.

I am not sure I agree with this.
We are annoucing a /24 from the 66 /8 block and I have only found 2 ISP's 
(according the the netlantis project) that can't reach me.
We are multihomed. I suspect that may be due to aggregation.
But even with our backup online, I still saw the routes propogate via 
Netlantis..

Or am I out in left field going nuts?

Later,
Jim



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