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if [[ $reason =~ (EXPIRE|FAIL|RELEASE|STOP) ]]; then
# delete dynamic nameservers from a configuration if lease was deleted
logmsg info "Deleting nameservers with tag \"dhcp-${interface}\" via vyos-hostsd-client"
vyos-hostsd-client --delete-name-servers --tag dhcp-${interface}
# try to delete default ip route (NOTE: here we use 'ip' wrapper, therefore a route will be actually deleted via /usr/sbin/ip or vtysh, according to the system state)
for router in $old_routers; do
logmsg info "Deleting default route: via $router dev ${interface}"
ip -4 route del default via $router dev ${interface}
done
fi
if [[ $reason =~ (EXPIRE6|RELEASE6|STOP6) ]]; then
# delete dynamic nameservers from a configuration if lease was deleted
logmsg info "Deleting nameservers with tag \"dhcpv6-${interface}\" via vyos-hostsd-client"
vyos-hostsd-client --delete-name-servers --tag dhcpv6-${interface}
fi
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