Hi !! i tried to install bird in Solaris (SunOS 5.10 Generic_118833-33 sun4u sparc SUNW,Netra-240) but could not get the luck, may be Sun Os doesn't support bird!!! So i installed FreeBSD in Netra-240 and then installed Bird (it was quite easy). Now I configured BGP.When did BGP peering with interface ip, BGP estalibshed but when i did same with loopback ips, BGP establishment failed.(note: both loopback ips can be ping from each other).My scenario: case1: BGP peering with loopback ips [Router1]------bgp------[Bird] Configuration: Router1: Router1#sh ip int brief Interface IP-Address OK? Method Status Protocol FastEthernet0/0 192.168.157.132 YES NVRAM up up Loopback0 30.30.30.1 YES NVRAM up up Router1#sh run | sec bgp router bgp 300 no synchronization bgp log-neighbor-changes neighbor 20.20.20.1 remote-as 200 neighbor 20.20.20.1 ebgp-multihop 3 neighbor 20.20.20.1 update-source Loopback0 no auto-summary Router1#ping 20.20.20.1 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 20.20.20.1, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 4/29/72 ms BIRD: bird> sh status BIRD 1.2.5 Router ID is 20.20.20.1 bird> sh interfaces em0 up (index=1) MultiAccess Broadcast Multicast AdminUp LinkUp MTU=1500 192.168.157.130/24 (Primary, broadcast 192.168.157.255, scope site) plip0 DOWN (index=2) PtP Multicast AdminUp LinkDown MTU=1500 lo0 up (index=3) MultiAccess AdminUp LinkUp Loopback Ignored MTU=16384 20.20.20.1/32 (Primary, broadcast 20.20.20.1, scope univ) bird> sh route for 30.30.30.1 30.30.30.1/32 via 192.168.157.132 on em0 [static1 01:57] * (200) protocol bgp R2_loopbk { description "My R2_loopbk BGP"; local as 200; neighbor 30.30.30.1 as 300; source address 20.20.20.1; import all; export all; } With above configuration, i cannot get bgp establishment.So below are my questions: 1) Can we install bird in Solaris 10? 2) Why with above configurations, BGP fails?Is there any thing i am missing? 3) when i use multihop in bird configuration file, it gives configuration error!! Thank you for u're support!!!!!