How do i get a bgp as number

An Autonomous System Number AS number or just ASN is a special number assigned by IANA used primarilly with Border Gateway Protocol which uniquely identifies an network under a single technical administration that has a unique routing policy, or is multi-homed to the public internet. This autonomous system number is required if you are to run BGP and peer with your internet service provider and between internet service providers at peering points and Internet Exchanges IX.

The most used are the public and private ASN's. ASN are used to uniquely identify networks or systems of networks which appear to the outside world to be running a single consistent routing policy.

This ensures that routes lead back to a unique source of a given range of IP addresses. The private ASN should not be seen on the global Internet they shouldn't be announced via your exterior gateway routing protocol.

They started with bit AS numbers also called 2-octet AS numbers that were assigned like this: 0: reserved. Explained As Simple As Possible. Full Access to our Lessons. More Lessons Added Every Week! You may cancel your monthly membership at any time. No Questions Asked!

Forum Replies Excellent! Thank you Rene! An AS needs to be created if a network connects to more than one AS with different routing policies. Some common examples of Autonomous Systems are networks connected to two or more upstream service providers or exchange points and networks peering locally at exchange points. This number is used both in the exchange of exterior routing information between neighboring Autonomous Systems and as an identifier of the AS itself.

For more information, see Policies for Autonomous System number management in the Asia Pacific region. That is, all routes originating from an AS is visible on the Internet. An organization will also be eligible if it can demonstrate that it will meet the above criteria upon receiving an AS Number or within a reasonably short time afterwards.

As the routing policy between the AS and the provider will not be visible in the Internet, a Private AS Number can be used for this purpose. This depends on how you received that AS Number. That is, if you decide to no longer use the LIR as one of your upstream providers, then you have to return the AS Number.

Note: this condition only applies to AS Numbers assigned after 1 December Yes, however the organization that is the current custodian of the AS Number will be asked to provide legal documentation of the transfer.