Solved: as-path prepend

per.nielsen · ‎05-14-2008

Hi there

When you use as-path prepend, and you are adding an as-path multiple times, why is this not concidered as a loop, after all you will have the same AS number appearing

multiple times

Cheers

Per

Harold Ritter · ‎05-14-2008

Per,

An AS-PATH loop occurs when a BGP router received an update from a remote AS with its own AS in the AS path.

Seeing a given AS more than once in an AS path is not a AS loop unless it is has been it your own.

Regards,

Harold Ritter
Sr Technical Leader
CCIE 4168 (R&S, SP)
harold@cisco.com
México móvil: +52 1 55 8312 4915
Cisco México
Paseo de la Reforma 222
Piso 19
Cuauhtémoc, Juárez
Ciudad de México, 06600
México

View solution in original post

Harold Ritter · ‎05-14-2008

Per,

An AS-PATH loop occurs when a BGP router received an update from a remote AS with its own AS in the AS path.

Seeing a given AS more than once in an AS path is not a AS loop unless it is has been it your own.

Regards,

Harold Ritter
Sr Technical Leader
CCIE 4168 (R&S, SP)
harold@cisco.com
México móvil: +52 1 55 8312 4915
Cisco México
Paseo de la Reforma 222
Piso 19
Cuauhtémoc, Juárez
Ciudad de México, 06600
México

per.nielsen · ‎05-14-2008

Got ya

Thanks a lot