GRE interfaces down in bird

[Yuriy Borysov]

Hello.

I try to configure OSPF between bird (FreeBSD, BIRD 1.6.4) and 
Juniper via GRE tunnels. I configure tunnels, they UP and works. I see 
"ping" and traffic from one host to another. But bird mark all GRE tunnels DOWN:

root at gw ~ # birdc show interface sum
BIRD 1.6.4 ready.
interface state address
em0       up    1.1.1.1/26
em1       up    2.2.2.2/29
em2       up    192.168.106.200/24
lo0       up    127.0.0.1/8
gre0      DOWN
gre1      DOWN
gre2      DOWN
gre3      DOWN
gre5      DOWN
gre10     DOWN
gre11     DOWN
gre12     DOWN

Do I need any special settings for GRE?

Thanks!

-- 
WBR, Yuriy B. Borysov
YOKO-UANIC | YOKO-RIPE