Perform the following task if you have BGP
configured, and you want to enable ECMP over multiple autonomous
systems. This task presumes that BGP is already configured. In the
following figure, two ECMP paths to a destination go through two
firewalls belonging to a single ISP in a single BGP autonomous system.
In the following figure,
two ECMP paths to a destination go through two firewalls belonging
to two different ISPs in different BGP autonomous systems.