BGP 4-Byte AS Number - Asdot notation
BGP uses AS numbers as a fundamental part of its routing process. Because conventional 2-byte public AS numbers were becoming exhausted, the IANA increased the AS numbers by introducing a 4-byte AS numbers. The Asdot notation to represent these AS numbers is as follows.
- For values between 0 and 65535, Asdot notation is simply the decimal value of the AS number. These values take up to 16 bits to express in binary. Examples include:
- For values above 65536, Asdot notation splits the 32-bit binary value into two 16 bit values. These values are represented as two decimal numbers separated by a dot. Examples include: