You should not have to add the routes to the firewall since the forwarding table is synchronized between the units in an Active/Passive cluster. I think these will not show in the routing table, but they should show up in the forwarding table on the Passive device (show routing fib). If the routes are not showing up there it might be good to open a support case. Also, making sure the Passive Link State setting is "Auto" will keep the link up so that can save some time, too. You might also try reducing some of the hold timers to see if it makes a difference, but it is usually best to keep those to default, if possible. Cheers, Kelly
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