[66444] in North American Network Operators' Group
Re: /24s run amuck
daemon@ATHENA.MIT.EDU (Steve Francis)
Tue Jan 13 16:00:04 2004
Date: Tue, 13 Jan 2004 12:58:11 -0800
From: Steve Francis <steve@expertcity.com>
To: "Patrick W.Gilmore" <patrick@ianai.net>
Cc: nanog@merit.edu
In-Reply-To: <D83A764C-4609-11D8-9CBB-000A9578BB58@ianai.net>
Errors-To: owner-nanog-outgoing@merit.edu
Patrick W.Gilmore wrote:
>
> On Jan 13, 2004, at 2:19 PM, Steve Francis wrote:
>
>> I'll take some education - given two POP's, different upstream ISPs
>> at each POP, and a desire to have traffic for specific networks (/24)
>> enter a specific POP, can that be done without de-aggregation?
>> We are not doing this ourselves - we're not yet big enough to have
>> our own aggregate blocks, but if we did, we could not just announce a
>> /20 at each POP, and transit the traffic back to the appropriate
>> datacenter ourselves. We're an ASP, and do not have real links
>> between POP's, only VPN's.
>>
>> If we used consistent upstreams at each POP, we could do it by
>> announcing specific /24's with no-export communities, but a
>> consistent set of ISPs are not available at each of the colo's we are
>> in.
>>
>> Is there some other trick I'm missing?
>
>
> If you can't take the traffic from Site A to Site B, why are you
> announcing the /24s to the world? Why not just use a /24 from the
> upstream in each location and not force everyone else on the Internet
> to see your /24 which only has one path?
It doesn't have just one path. Multiple (different) ISPs at each location.
