Hi all, I want to enable a backup BGP session (or perhaps, keep the session up and change the import/export filters) only when the main peer goes down (default disappears) Conceptually, I want to do something like this: if net = 0.0.0.0/0 then { if from = x.x.x.x then { # x.x.x.x = main peer disable backup_bgp_session; } else { enable backup_bgp_session; } } Obviously this doesn't work, since disable/enable cannot be used in the config. The logic is also a little flawed. I thought about setting a global variable in one filter, and using that variable in another to decide what to export to the backup peer, but it seems that BIRD only supports local variables? I can fudge it by using an external script to query "birdc show route 0.0.0.0/0" to check for the presense of default, and then "birdc enable backup_bgp_session" or "birdc disable backup_bgp_session" as appropriate, but I'd prefer to be able to do it within BIRD. Hope someone can give me some hints. Thanks.