关于配置lvs-tun时，在Director与Realserver在不同网段无法运行的疑惑

最近尝试了一下lvs集群，在LVS-DR模式下已经可以运行，而在使用LVS-TUN模式下，跨网段却怎么也调不通，而且也不知道如何从哪一方面跟踪问题，不得已请求援助，请高手指点，先谢谢了！：）
一.我的环境是Suse linux 10(Linux linux-105 2.6.16.46-0.12-bigsmp ),先用两台机器测试，网络环境如下：
Director:
58.1.32.43 255.255.255.192 eth0
VIP 58.1.32.31 58.1.32.192
RealServer:
58.1.32.105 255.255.255.192 eth0
二.负载均衡器配置文件如下：
#!/bin/bash
VIP1=58.1.32.31
RIP2=58.1.32.105
# Close IP Forwarding
echo "1"> /proc/sys/net/ipv4/ip_forward
ifconfig eth0:0 down
#ifconfig eth0 192.168.0.253 netmask 255.255.255.0 broadcast 192.168.0.255 up
ifconfig eth0:0 $VIP1 netmask 255.255.255.192 broadcast $VIP1 up
ipvsadm -C
ipvsadm -A -t $VIP1:8080 -s rr
ipvsadm -a -t $VIP1:8080 -r $RIP2:8080 -i -w 1
ipvsadm

实际服务器配置如下：
#!/bin/bash
#srcipt to start LVS DR realserver

VIP=58.1.32.31

#start LVS-DR real server on this machine
/sbin/ifconfig tunl0 down
/sbin/ifconfig tunl0 up
echo "1"> /proc/sys/net/ipv4/conf/tunl0/arp_ignore
echo "2"> /proc/sys/net/ipv4/conf/tunl0/arp_announce
echo "0"> /proc/sys/net/ipv4/conf/tunl0/rp_filter
echo "1"> /proc/sys/net/ipv4/conf/tunl0/forwarding

echo "1"> /proc/sys/net/ipv4/conf/all/arp_ignore
echo "2"> /proc/sys/net/ipv4/conf/all/arp_announce

/sbin/ifconfig tunl0 $VIP broadcast $VIP netmask 255.255.255.255 up
/sbin/route add -host $VIP dev tunl0

三:调试过程
1.网络没有问题，可以ping通各个服务器
2.tomcat服务没有问题，8080端口可以直接访问，直接测试实际服务器,输入http://58.1.32.105:8080/test/lvs-test.html显示正常
3.我用抓包命令： tcpdump | grep http分别在这两台机器上执行，(请帮忙分析)
结果如下：
负载均衡器(58.1.32.31)输入结果如下:
linux-lv86-test:/usr/local/bin # tcpdump | grep http
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth0, link-type EN10MB (Ethernet), capture size 96 bytes
13:16:03.369656 IP 58.65.40.138.1140 > 58.1.32.31.http-alt: S 1568996789:1568996789(0) win 65535
13:16:03.369771 IP linux-lv86-test.site > 58.1.32.105: IP 58.65.40.138.1140 > 58.1.32.31.http-alt: S 1568996789:1568996789(0) win 65535 (ipip-proto-4)
13:16:06.356421 IP 58.65.40.138.1140 > 58.1.32.31.http-alt: S 1568996789:1568996789(0) win 65535
13:16:06.356589 IP linux-lv86-test.site > 58.1.32.105: IP 58.65.40.138.1140 > 58.1.32.31.http-alt: S 1568996789:1568996789(0) win 65535 (ipip-proto-4)
13:16:12.370612 IP 58.65.40.138.1140 > 58.1.32.31.http-alt: S 1568996789:1568996789(0) win 65535
13:16:12.370729 IP linux-lv86-test.site > 58.1.32.105: IP 58.65.40.138.1140 > 58.1.32.31.http-alt: S 1568996789:1568996789(0) win 65535 (ipip-proto-4)
实际服务器(58.1.32.105)输出结果如下：
linux-105:/usr/local/bin # tcpdump | grep http
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth0, link-type EN10MB (Ethernet), capture size 96 bytes
13:14:27.027591 IP 58.1.32.43 > linux-105.site: IP 58.65.40.138.1140 > 58.1.32.31.http-alt: S 1568996789:1568996789(0) win 65535 (ipip-proto-4)
13:14:30.014470 IP 58.1.32.43 > linux-105.site: IP 58.65.40.138.1140 > 58.1.32.31.http-alt: S 1568996789:1568996789(0) win 65535 (ipip-proto-4)
13:14:36.028743 IP 58.1.32.43 > linux-105.site: IP 58.65.40.138.1140 > 58.1.32.31.http-alt: S 1568996789:1568996789(0) win 65535 (ipip-proto-4)