[isp-bgp] RE: BGP advantages

[Bob Tinkelman <bob@...>]

>> The more specific prefix will get advertised and used if both
>> prefixes are in table, but this isn't a /good thing/:  It creates
>> untenable route table growth.  You can imagine what might happen
>> if another 100,000 companies wanted to advertise /28's.  Also some
>> ISPs will reject small prefixes, or won't accept non/16 prefixes
>> from legacy class B space (verio).

> I don't think Verio's had those filters for years.  

I don't know if it's been "for years", but the Verio web site
states the filters Verio uses on announcements from their peers
allow prefix lengths up to 24.  [This used to be 22 for nets in
the classic A and B spaces.]

Ref: http://info.us.bb.verio.net/routing.html#PeerFilter

--
Bob Tinkelman <bob@...>
ISPnet, Inc.    718.464.4747







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