Re: [isp-bgp] BGP announcement question

[Marshall Eubanks <tme@multicasttech.com>]

Because of longest prefix match, this will work. (This is a "hole" in
CIDR assignments; I keep track of such things and if you look at  
Figure 5 here
http://www.multicasttech.com/status/cidr.html , you will
see that there are > 100,000 of them.)

The biggest problem is that many providers will not announce blocks  
longer than /24,
but a /23 isn't, so you should be OK.

Regards
Marshall

On Feb 28, 2007, at 1:45 PM, Jim Barstow wrote:

>  I have been googling for the answer to this, but couldn't find it.
>
> I have ARIN PI space at my an ASN in my headquarters location. It  
> announces
> the /20.
>
> I now have a new location that is not on my attached network, thus,  
> it has
> its own upstream peers and whatnot.  Can I announce a smaller /23  
> from my
> /20 from the new location?  Will the remainder of the /20 continue  
> to go
> towards my existing ASN?
>
> I don't know if there is some "glue" that ties my /20 to my primary  
> sites
> ASN.
>
>
> ------------------------------------
> SmartTel Communications
> Jim Barstow
> Sr. Telecom Engineer
> jimb@smarttelco.com
> PO Box 367
> 22645 Canal Road
> Suite E
> Orange Beach, AL 36561
> tel: (251) 224-0868
> fax: (251) 224-0830
> mobile: (251) 747-4913
> ------------------------------------



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