On Friday, September 16, 2011 07:51:04 AM Schiller, Heather A wrote:
I thought AS-plain notation was the standard for 4-byte ASN's?
as-plain is not the "standard" per se. Think of it more as the "preferred" option within the industry. o All major vendors support it, so there's no need to convert to as-dot when you upgrade your router software to support 4-byte ASN's. o as-plain doesn't break your AS_PATH regular expressions, which is very useful. o as-plain is a known representation format among operators, and 4-byte ASN's continuing this tradition keeps the network stable. as-dot notation looks really Cool & Sexy (tm), but is cumbersome for your AS_PATH regular expressions. It doesn't make things impossible, just, well, cumbersome :-). Hope this helps. Cheers, Mark.