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Add policy (any-available|all-available) for target checking for failover route
set protocols failover route 192.0.2.55/32 next-hop 192.168.122.1 check policy 'any-available'
set protocols failover route 192.0.2.55/32 next-hop 192.168.122.1 check target '192.168.122.1'
set protocols failover route 192.0.2.55/32 next-hop 192.168.122.1 check target '192.168.122.11'
It depends if we need that all targets must be alive on just one target.
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There is only one target for checking ICMP/ARP
Extend it for checking multiple targets
set protocols failover route 192.0.2.55/32 next-hop 192.168.122.1 check target '203.0.113.1'
set protocols failover route 192.0.2.55/32 next-hop 192.168.122.1 check target '203.0.113.11'
The route will be installed only if all targets are 'alive'
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Failover route allows to install static routes to the kernel routing
table only if required target or gateway is alive
When target or gateway doesn't respond for ICMP/ARP checks this route
deleted from the routing table
Routes are marked as protocol 'failover' (rt_protos)
cat /etc/iproute2/rt_protos.d/failover.conf
111 failover
ip route add 203.0.113.1 metric 2 via 192.0.2.1 dev eth0 proto failover
$ sudo ip route show proto failover
203.0.113.1 via 192.0.2.1 dev eth0 metric 1
So we can safely flush such routes
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