From: Howard C. Berkowitz (hcb@gettcomm.com)
Date: Fri Aug 26 2005 - 12:10:54 GMT-3
At 11:25 PM -0400 8/25/05, Scott Morris wrote:
>No arguments from me. :)
>
>And this is why we have 170,000'ish routes in the BGP table.
And count that as lucky. Tier 1 providers generally have enough
no-export customer and infrastructure routes to have double that
number in their internal BGP tables. When you add multiple views and
policy sets on the same router, we are getting closer to the
million-route table.
>
>-----Original Message-----
>From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
>Howard C. Berkowitz
>Sent: Thursday, August 25, 2005 11:21 PM
>To: ccielab@groupstudy.com
>Subject: RE: About ISP address announcement
>
>At 8:26 PM -0400 8/25/05, Scott Morris wrote:
>>If you're still only going through one AS number, then they're going to
>>have an aggregate route above that anyway, and absorb your more
>>specific announcement.
>
>I didn't assume that 85.1.0.0/22 was a more-specific of ISP A's allocation.
>It may well be, or it may be a separate, non-aggregated block that ISP A can
>assign.
>
>We probably don't have all the information here. To have gotten a registered
>AS number, Woody's AS must have plans of multihoming. If they multihome to
>ISP B, ISP B will certainly have to advertise 85.1.0.0/22.
>
>For multihoming to work, however, if 85.1.0.0/22 is a more-specific of ISP
>A's space, ISP A _must_ still advertise the more-specific as well as its
>aggregate. Otherwise, all traffic to 85.1.0.0/22 would go through ISP B
>because ISP B is advertising the most specific route.
>
>>
>>They just static'd to you. You'll just need to talk with them, but
>>there's no technical reason things shouldn't be ok. On the other hand,
>>they may take back the /22 if you have your own /21. I would anyway.
>>:)
>>
>>Scott
>>
>>-----Original Message-----
>>From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of ??
>>Sent: Thursday, August 25, 2005 7:47 PM
>>To: ccielab@groupstudy.com
>>Subject: About ISP address announcement
>>
>>hi group:
>>
>>I have a question and need your help:
>>
>>we rent IP add 85.1.0.0/22 from ISPA before, and we used default route
>>to upstream ISP A.
>>but now, we applied public AS number and IP address 99.1.0.0/21
>>ourself. we are going to BGP connect to Upstream ISP A. I am confused
>>with the old IP address 85.1.0.0/22. This IP address block is blong to
>>ISP A, if we use BGP connection, this IP address origin from our AS
>>number, not from ISPA AS number.
>>
>>I think it will work fine, but i do not know if it is illegal.how to do
>>with it.
>>
>>thanks.
>>
>>Woody
>
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