Looking for some help with this config on an ASR1001x, it's connected to 2 ISPs where 1 (slower) is for failover only, with lower local-pref and is path prepended. The backup ISP doesn't need BFD configured.
In this scenario would I only need BFD configured on the interface for the primary ISP, and bfd fall-over only on the primary neighbor?
This is what I'd have for config, the lines in asterisk are not implemented yet.
***bfd-template single-hop ISP_primary_outage ***interval min-tx 50 min-rx 50 multiplier 5 ! interface GigabitEthernet0/0/1 description ISP_primary ip address x.x.x.x ***bfd-template ISP_primary_outage ! interface GigabitEthernet0/0/2 description ISP_backup ip address y.y.y.y ! router BGP 100 neighbor x.x.x.x remote as 200 ***neighbor x.x.x.x fall-over bfd neighbor y.y.y.y remote as 300 neighbor y.y.y.y route-map ISP_backup_in neighbor y.y.y.y route-map ISP_backup_out ! routemap ISP_backup_in set local-preference 50 ! routemap ISP_backup_out set as-path prepend 100 100 100 !
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