Hi, I'm trying to migrate to BIRD 1.3.8 from Quagga, and have run across a problem with a unnumbered tun interface. BIRD seems to think that it is DOWN, even though it isn't - and therefore don't export its defined static device routes to the kernel table (they're marked "dormant"). My complete configuration is as follows: log syslog { debug, trace, info, remote, warning, error, auth, fatal, bug }; protocol kernel { scan time 20; export where source = RTS_STATIC_DEVICE; } protocol device { scan time 10; } protocol static { route 172.40.33.3/32 via "nat64"; route 172.40.60.0/26 via "nat64"; } protocol ospf { area 0.47.1.2 { nssa; interface "eth*" { type broadcast; }; stubnet 172.40.33.3/32; stubnet 172.40.60.0/26; }; } Even though the device is clearly UP, BIRD thinks it's DOWN: $ ip address 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 00:16:3e:d7:0f:8e brd ff:ff:ff:ff:ff:ff inet 172.40.62.91/31 brd 172.40.62.91 scope global eth0 valid_lft forever preferred_lft forever inet6 fe80::216:3eff:fed7:f8e/64 scope link valid_lft forever preferred_lft forever 10: nat64: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 500 link/none $ birdc show interfaces BIRD 1.3.8 ready. lo up (index=1) MultiAccess AdminUp LinkUp Loopback Ignored MTU=16436 127.0.0.1/8 (Primary, scope host) eth0 up (index=2) MultiAccess Broadcast Multicast AdminUp LinkUp MTU=1500 172.40.62.91/31 (Primary, opposite 172.40.62.90, scope univ) nat64 DOWN (index=10) PtP Multicast AdminUp LinkUp MTU=1500 $ birdc show static BIRD 1.3.8 ready. 172.40.33.3/32 dev nat64 (dormant) 172.40.60.0/26 dev nat64 (dormant) As soon as I add any bogus IP address to the device, everything starts working just fine: $ ip address add 192.0.2.0/32 dev nat64 $ birdc show interfaces BIRD 1.3.8 ready. lo up (index=1) MultiAccess AdminUp LinkUp Loopback Ignored MTU=16436 127.0.0.1/8 (Primary, scope host) eth0 up (index=2) MultiAccess Broadcast Multicast AdminUp LinkUp MTU=1500 172.40.62.91/31 (Primary, opposite 172.40.62.90, scope univ) nat64 up (index=10) PtP Multicast AdminUp LinkUp MTU=1500 192.0.2.0/32 (Primary, scope univ) $ birdc show static BIRD 1.3.8 ready. 172.40.33.3/32 dev nat64 172.40.60.0/26 dev nat64 $ ip route show proto bird 172.40.33.3 dev nat64 172.40.60.0/26 dev nat64 While this is an acceptable workaround for me, this behaviour must be a bug, right? For what it's worth, Quagga never complained about the unnumbered interface. Best regards, -- Tore Anderson Redpill Linpro AS - http://www.redpill-linpro.com