================================================================================ ----------------------------------- PRFC0000 ----------------------------------- Title: BGP Point-To-Point Link Addressing Schema Type: Mandation Submitted on: Sep 01 2011 Submitted by: Luke J Militello -------------------------------------------------------------------------------- Syntax: FDB3:[LO-ASN]:[HI-ASN]:[NET-ID]::[HOST-ID]/64 -------------------------------------------------------------------------------- 1st Hexatet: Always 'FDB3'. 'FD' signifies private use; RFC mandated. 'B3' signifies a BGP p2p link; this is 179/TCP in hexadecimal. 2nd Hexatet: Always the lower number of the two ASN's to be peered. This is the ASN represented in hexadecimal. 3rd Hexatet: Always the higher number of the two ASN's to be peered. This is the ASN represented in hexadecimal. 4th Hexatet: This is the link identifier. This allows for multiple links for the same peer. Your first link is always zero. You may use any number thereafter. However, numerical hexadecimal order is recommended. 5th Hexatet: Always zero; reserved for future use. 6th Hexatet: Always zero; reserved for future use. 7th Hexatet: Always zero; reserved for future use. 8th Hexatet: Always '1' or '2'. The lower ASN is always '1'. The higher ASN is always '2'. -------------------------------------------------------------------------------- Example: ASN 64512 (FC00) wants to peer with ASN 65535 (FFFF). ASN 64512's address will be: FDB3:FC00:FFFF::1/64 ASN 65535's address will be: FDB3:FC00:FFFF::2/64 Example: ASN 64957 (FDBD) wants a second peer with ASN 65354 (FF4A). ASN 64957's second address will be: FDB3:FDBD:FF4A:1::1/64 ASN 65354's second address will be: FDB3:FDBD:FF4A:1::2/64 -------------------------------------------------------------------------------- This allows you to key on the parent network FDB3::/16 for your prefix lists and ACL's which will permit all BGP p2p links to route within the network. It also allows a certain order for troubleshooting. Should one need to preform a trace, you will be able to map the path taken by your packets. One can also advertise their summary route of FDB3:[LO-ASN]:[HI-ASN]::/48. -------------------------------- END OF COMMENT -------------------------------- ================================================================================