关于ipvsadm 报 -b: unknown option

我在rhel 6 下安装了淘宝内核,想启动fullnal模式,却报错 -b: unknown option,即标题那个。
系统uname输出: 2.6.32-220.23.1.tb2551.el6.x86_64 #1 SMP Tue Mar 12 19:03:37 CST 2013 x86_64 x86_64 x86_64 GNU/Linux
版本信息 : ipvsadm v1.26 2008/5/15 (compiled with popt and IPVS v1.2.1)
ipvsadm命令:ipvsadm -C
ipvsadm -A -t 192.168.0.53:80 -s rr
ipvsadm -a -t 192.168.0.53:80 -r 10.4.1.60:80 -b
有谁知道怎么解决么?

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