Customer Service Center
Spirent KB Article
Doc ID: FAQ13119
Email Article Link
Spirent TestCenter: How do I configure BGP 4 Byte AS number?
BGP 4 Byte ASN in Test Center can be configured by either selecting 4 bytes ASN support and/or the DUT to have 4 Byte ASN support.
Configure it by enabling the check box under the BGP tab for the emulated device(as shown above). Enabling the BGP emulated device to have 4 byte ASN capability automatically makes the 2 byte ASN read as 23456.
All AS numbers between 0-65535 are represented as a decimal number, both in CLI as well as in show commands.
ASDOT format for the BGP 4 byte ASN can convert ASN 4 byte ASN to asplain by:
Example: AS numbers larger than 65535 is represented using ASDOT notation as
<higher2bytes in decimal>.<lower2bytes in decimal>
AS 65546 is represented as "1.10"
["1" * 65536] + "10" = 65546
Since at least in 4.49 it appears asplain can be directly entered into the 4 byte AS number field. BGP session comes up with this setting.
Product : Spirent TestCenter,Routing,Spirent TestCenter,BGP