Steve, We are obviously interpreting this in different slants. Definition of Transit service: for example, AS200 is said to receive transit service from, let's say AS3356, if through this connection, AS200 receives connectivity to the entire Internet and not only AS3356 and its customers. Yes I understand the customer is using static, however, some providers use BGP, and they use BGP to peer with other ISPs, that's it. ~Jay Murphy IP Network Specialist NM State Government IT Services Division PSB – IP Network Management Center Santa Fé, New México 87505 "We move the information that moves your world." “Good engineering demands that we understand what we’re doing and why, keep an open mind, and learn from experience.” “Engineering is about finding the sweet spot between what's solvable and what isn't." Radia Perlman Please consider the environment before printing e-mail -----Original Message----- From: Steve Bertrand [mailto:steve@ipv6canada.com] Sent: Monday, June 07, 2010 4:38 PM To: Murphy, Jay, DOH Cc: Dale Cornman; nanog@nanog.org Subject: Re: Strange practices? On 2010.06.07 17:59, Murphy, Jay, DOH wrote:
"So if the enterprise loses connectivity to one of these two providers, does the provider without working connectivity to the enterprise have mechanism in place to cease originating the address space?"
Yes, BGP updates.
...again, I'm confused. BGP updates from where to where? From how I understand the OP's original question, there is no BGP. Hence, if one of the providers is statically routing the prefix to an interface or un-numbered as opposed to an IP address, then blackholing can occur if IP reachability is broken, but the link-layer is not. Is this not correct? Steve Confidentiality Notice: This e-mail, including all attachments is for the sole use of the intended recipient(s) and may contain confidential and privileged information. Any unauthorized review, use, disclosure or distribution is prohibited unless specifically provided under the New Mexico Inspection of Public Records Act. If you are not the intended recipient, please contact the sender and destroy all copies of this message. -- This email has been scanned by the Sybari - Antigen Email System.