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Dell Configuration Guide for the S4048–ON System 9.14.2.5

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AS4 Number Representation

Dell EMC Networking OS supports multiple representations of 4-byte AS numbers: asplain, asdot+, and asdot.

NOTE The ASDOT and ASDOT+ representations are supported only with the 4-Byte AS numbers feature. If 4-Byte AS numbers are not implemented, only ASPLAIN representation is supported.
ASPLAIN is the default method the system uses. With the ASPLAIN notation, a 32-bit binary AS number is translated into a decimal value.
  • All AS numbers between 0 and 65535 are represented as a decimal number when entered in the CLI and when displayed in the show commands output.
  • AS numbers larger than 65535 are represented using ASPLAIN notation. When entered in the CLI and when displayed in the show commands output, 65546 is represented as 65546.
ASDOT+ representation splits the full binary 4-byte AS number into two words of 16 bits separated by a decimal point (.): <high-order 16 bit value>.<low-order 16 bit value>. Some examples are shown in the following table.
  • All AS numbers between 0 and 65535 are represented as a decimal number, when entered in the CLI and when displayed in the show commands outputs.
  • AS Numbers larger than 65535 is represented using ASDOT notation as <higher 2 bytes in decimal>.<lower 2 bytes in decimal>. For example: AS 65546 is represented as 1.10.

ASDOT representation combines the ASPLAIN and ASDOT+ representations. AS numbers less than 65536 appear in integer format (asplain); AS numbers equal to or greater than 65536 appear in the decimal format (asdot+). For example, the AS number 65526 appears as 65526 and the AS number 65546 appears as 1.10.

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