BGP IPv6 conditional route advertisement

IPv6 BGP conditional route advertisement supports traffic failover for a FortiGate with hyperscale firewall features operating as a CGNAT translator connected to two ISPs over IPv6.

When the FortiGate can connect to the primary ISP, IPv6 BGP routes to the primary ISP are shared with the networks (LANs) behind the FortiGate. With BGP IPv6 conditional route advertisement enabled, if the FortiGate connection to the primary ISP fails, the FortiGate acquires IPv6 BGP routes to the secondary ISP and advertises these routes to the networks (LANs) behind the FortiGate.

Use the following configuration to enable IPv6 conditional route advertisement:

config router bgp

config neighbor

edit <name>

config conditional-advertise6

edit <name>

set condition-routemap <name>

set condition-type {exist | non-exist}

end

exist true if condition route map is matched.

non-exist true if condition route map is not matched.