Sunday, June 9, 2024

Cisco hidden command: bgp bestpath as-path multipath-relax

Hidden command

  bgp bestpath as-path multipath-relax


What for is this?

By default, Cisco does not do load-balance or distribute traffic between different ASs, this command allows it. Important, you must also use the maximum-paths command


Example:

router bgp 65001

 bgp router-id 1.1.1.1

 bgp log-neighbor-changes

 bgp bestpath as-path multipath-relax

 neighbor 2001:DB8:12::2 remote-as 65002

 neighbor 2001:DB8:12:10::2 remote-as 65002

 neighbor 2001:DB8:13:11::3 remote-as 65003

 !

 address-family ipv4

 no neighbor 2001:DB8:12::2 activate

 no neighbor 2001:DB8:12:10::2 activate

 no neighbor 2001:DB8:13:11::3 activate

 exit-address-family

 !

 address-family ipv6

 maximum-paths 3

 neighbor 2001:DB8:12::2 activate

 neighbor 2001:DB8:12:10::2 activate

 neighbor 2001:DB8:13:11::3 activate

 exit-address-family


Output after implementation:

     Network          Next Hop            Metric LocPrf Weight Path

 *m  2001:DB8::4/128  2001:DB8:12:10::2

                                                              0 65002 65004 ?

 *>                   2001:DB8:12::2                         0 65002 65004 ?

 *m                   2001:DB8:13:11::3

                                                              0 65003 65004 ?

 *m  2001:DB8:24:11::/64

                       2001:DB8:12:10::2

                                                              0 65002 65004 ?

 *>                   2001:DB8:12::2                         0 65002 65004 ?

 *m                   2001:DB8:13:11::3

                                                              0 65003 65004 ?

 *m  2001:DB8:34::/64 2001:DB8:12:10::2

                                                              0 65002 65004 ?

 *>                   2001:DB8:12::2                         0 65002 65004 ?

 *m                   2001:DB8:13:11::3

                                                              0 65003 65004 ?

No comments:

Post a Comment