www.dev.jj.com is an alias of balancer-1.dev.jj.com 10.0.0.15

########################################################################

$ sudo ipvsadm
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  balancer-1.dev.jj.com:www rr
  -> test-4.dev.jj.com:www        Route   1      0          0
  -> test-5.dev.jj.com:www        Route   1      0          0

########################################################################

Client:

$ wget -O - http://www.dev.jj.com
--2012-06-20 13:13:02--  http://www.dev.jj.com/
Resolving www.dev.jj.com... 10.0.0.15
Connecting to www.dev.jj.com|10.0.0.15|:80...

Balancer:

$ sudo ipvsadm
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  balancer-1.dev.jj.com:www rr
  -> test-4.dev.jj.com:www        Route   1      0          0
  -> test-5.dev.jj.com:www        Route   1      0          1