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求助:怎么realserver关掉后还能访问

我采用DR模式,调度算法用的是源地址散列,我关掉一台realserver后,前台还能访问?

VIP:192.168.64.31

LVS Server IP:192.168.64.21

RealServer1:192.168.64.11
RealServer2:192.168.64.12

LVS配置:
/sbin/ifconfig eth0:1 192.168.64.31 netmask 255.255.255.255 up
/sbin/route add -host 192.168.64.31 dev eth0:1
/sbin/ipvsadm -A -t192.168.64.31:80 -s sh
/sbin/ipvsadm -a -t192.168.64.11:80 -g
/sbin/ipvsadm -a -t192.168.64.12:80 -g
/sbin/ipvsadm

RealServer配置(两台,分别为A、B):

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