BGP Attributes and Path Selection


(Rene Molenaar) #1

This topic is to discuss the following lesson:


(Dominique R) #2

Hi René,
good lesson i read in detail
I am not a BGP expert as i am studying now (only) for CCNP
I read other sources for description of attributes (i dont know if i may give this source name)
This (well known) source give 2 more attributes

  • the first one between 8 (Shortest IGP path to BGP next hop) and 9 (Oldest Path) he call “Multipath”: determines wether or not multiple paths need to be injected into the routing table, and continues if the best path is not yet selected.
  • the second between 10 (router-id) and 11(neighbor IP address) he call “Minimum Cluster List Length”: a tie breaker used in a route reflector BGP configuration that prefers the route with the minimum cluster list length
    Do you think you should add these attributes in your list ?
    Thank you
    Best regards

(Lazaros Agapides) #3

Hello Dominique

Looking at Cisco’s official BGP documentation whose link is below, it does indeed include these two attributes that you mention. I’ll let Rene take a look and see if those should be added as well.

Thanks for pointing that out!

Laz


(Dominique R) #4

thanks very much Laz