At 10:24 AM -0600 7/29/09, Danny McPherson wrote:
On Jul 29, 2009, at 10:14 AM, Terry Manderson wrote:
Certainly one to add to the use-cases material.
Off the top of my head, from my interpretation the IX operator (presumably
who does not have an ASN) would issue a ROA for each and every IX
participant's AS to announce the IX prefix from the customer AS.
If the IX does have an AS, the might like to announce from their own AS and
then perhaps attempt to control route distribution. Meaning they would
create a ROA for their own prefix.
Well, most of the time there's direct interconnection there
and the IX operator isn't in the Network layer path or even
necessarily a participate in routing with IXP connectors..
Danny,
I'm not sure I understand how an IXP's connectivity affects their
ability to authorize the relevant ISPs to advertise the prefix. The
IXP would do this by issuing a ROA for each ISP in question, which
means it posts the ROAs to the repository system. That authorizes
each ISP to send a BGP update containing the prefix in question, and
with the ISP's AS# as the origin. There is not need for the IXP to
generate or transmit any BGP updates.
Steve
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