slb
real sipudp "server1" 172.16.84.252 5060 1000 sip-udp 3 3 60
slb real sipudp "server2" 172.16.84.253 5060 1000 sip-udp 3 3 60
slb group method "group1" sipuid rr
slb group member "group1" "r1" 1
slb group member "group1" "r2" 1
slb virtual sipudp "vip1" 172.16.83.165 5060
slb policy
default "vip1" "group1"
sip nat 172.16.83.165 5060 172.16.84.252 5060 udp 60 callid
sip nat 172.16.83.165 5060 172.16.84.253 5060 udp 60 callid
sip multireg on