"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. ~Jay Murphy IP Network Specialist NM State Government IT Services Division PSB - IP Network Management Center Santa Fé, New México 87505 Bus. Ph.: 505.827.2851 "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 P Please consider the environment before printing e-mail 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.