Hi,

one machine:

# uname -a
OpenBSD xxx.xxx.xx 4.1 GENERIC#1435 i386

# ifconfig rl0
rl0: flags=8a43<UP,BROADCAST,RUNNING,ALLMULTI,SIMPLEX,MULTICAST> mtu 1500
         lladdr 00:30:84:88:31:af
         groups: egress
         media: Ethernet autoselect (100baseTX full-duplex)
         status: active
         inet 192.168.3.199 netmask 0xffffff00 broadcast 192.168.3.255
         inet6 fe80::230:84ff:fe88:31af%rl0 prefixlen 64 scopeid 0x1

# grep -v ^# /etc/mrouted.conf
phyint rl0
tunnel 192.168.3.199 192.168.2.199 metric 1 threshold 64 rate_limit 5000

# mrouted -d
debug level 2
12:08:32.292 mrouted version 3.8
12:08:32.301 Getting vifs from kernel interfaces
12:08:32.304 installing rl0 (192.168.3.199 on subnet 192.168.3/24) as vif 
#0 - rate=0
12:08:32.304 installing rl1 (172.19.20.1 on subnet 172.19/16) as vif #1 - 
rate=0
12:08:32.304 Getting vifs from /etc/mrouted.conf
12:08:32.308 installing tunnel from 192.168.3.199 to 192.168.2.199 as vif 
#2 - rate=5000
12:08:32.308 Installing vifs in mrouted...
12:08:32.308 vif #0, phyint 192.168.3.199
12:08:32.309 vif #1, phyint 172.19.20.1
12:08:32.310 vif #2, tunnel 192.168.3.199 -> 192.168.2.199
pruning on
12:08:32.313 Installing vifs in kernel...
12:08:32.313 vif #0, phyint 192.168.3.199
12:08:32.314 vif #1, phyint 172.19.20.1
12:08:32.314 vif #2, tunnel 192.168.3.199 -> 192.168.2.199
12:08:32.314 setsockopt MRT_ADD_VIF: Operation not supported

another side:

# uname -a
OpenBSD xxx.xxx.xx 4.1 GENERIC#1435 i386

# ifconfig rl0
rl0: flags=8a43<UP,BROADCAST,RUNNING,ALLMULTI,SIMPLEX,MULTICAST> mtu 1500
         lladdr 00:30:84:9e:97:7f
         groups: egress
         media: Ethernet autoselect (100baseTX full-duplex)
         status: active
         inet 192.168.2.199 netmask 0xffffff00 broadcast 192.168.2.255
         inet6 fe80::230:84ff:fe9e:977f%rl0 prefixlen 64 scopeid 0x1

# grep -v ^# /etc/mrouted.conf
phyint rl0
tunnel 192.168.2.199 192.168.3.199 metric 1 threshold 64 rate_limit 5000

# mrouted -d
debug level 2
06:36:37.704 mrouted version 3.8
06:36:37.712 Getting vifs from kernel interfaces
06:36:37.714 installing rl0 (192.168.2.199 on subnet 192.168.2/24) as vif 
#0 - rate=0
06:36:37.715 Getting vifs from /etc/mrouted.conf
06:36:37.717 installing tunnel from 192.168.2.199 to 192.168.3.199 as vif 
#1 - rate=5000
06:36:37.718 Installing vifs in mrouted...
06:36:37.718 vif #0, phyint 192.168.2.199
06:36:37.718 vif #1, tunnel 192.168.2.199 -> 192.168.3.199
pruning on
06:36:37.734 Installing vifs in kernel...
06:36:37.735 vif #0, phyint 192.168.2.199
06:36:37.735 vif #1, tunnel 192.168.2.199 -> 192.168.3.199
06:36:37.735 setsockopt MRT_ADD_VIF: Operation not supported

# ping -Rn 192.168.3.199
PING 192.168.3.199 (192.168.3.199): 56 data bytes
64 bytes from 192.168.3.199: icmp_seq=0 ttl=253 time=12.684 ms
RR:     192.168.2.1
         192.168.3.1
         192.168.3.199
         192.168.3.1
         192.168.2.1
         192.168.2.199
64 bytes from 192.168.3.199: icmp_seq=1 ttl=253 time=9.112 ms   (same 
route)
--- 192.168.3.199 ping statistics ---
2 packets transmitted, 2 packets received, 0.0% packet loss
round-trip min/avg/max/std-dev = 9.112/10.898/12.684/1.786 ms

Whats wrong?!