【求助】请版主、各位大侠救救我！！！服务器的代理...

我的交换机配置如下，还有拓扑。现在我上网的代理服务器是放在VLAN11 里的，在我们局域网里的IP地址为：192.168.4.2。掩码为：255.255.255.0。网关为:192.168.4.254。在同一VLAN下的主机上网时断时续，很不稳定，在另外一个VLAN里的主机跟本上不了。 在没有上这台交换机之前，我们大家都处在同一广播域里(就是全是用“傻瓜型”二层交换机联网)，现在划分VLAN了，不在服务器这个VLAN里主机就上不了网。 但是大家都能PING通服务器，而且都设置了代理服务器的地址。请大家教我，为什么，怎样设置？？？？？还要做什么配置或者设置？？？？？ configure terminal vtp mode transparent vlan 10 name beiqu exit vlan 11 name nanqu end configure terminal interface fastethernet0/10 switchport mode access switchport access vlan 10 exit interface fastethernet0/11 switchport mode access switchport access vlan 11 exit interface vlan10 ip address 192.168.3.254 255.255.252.0 no shutdown exit interface vlan11 //服务器所在VLAN ip address 192.168.4.254 255.255.255.0 no shutdown exit ip routing ip forward-protocol udp 137 ip forward-protocol udp 138 ip forward-protocol udp 139 inter vlan 10 ip helper 192.168.4.0 exit inter vlan 11 ip helper 192.168.0.0 ip helper 192.168.1.0 ip helper 192.168.2.0 ip helper 192.168.3.0 exit ip route 0.0.0.0 0.0.0.0 Vlan10 这是静态路由 ip route 0.0.0.0 0.0.0.0 Vlan11 access-list 103 permit ip 192.168.4.0 0.0.0.255 192.168.0.0 0.0.0.255 access-list 103 permit ip 192.168.4.0 0.0.0.255 192.168.1.0 0.0.0.255 access-list 103 permit ip 192.168.4.0 0.0.0.255 192.168.2.0 0.0.0.255 access-list 103 permit ip 192.168.4.0 0.0.0.255 192.168.3.0 0.0.0.255 access-list 103 permit udp any any eq netbios-dgm access-list 103 permit udp any any eq netbios-ns access-list 103 permit udp any any eq netbios-ss access-list 103 permit udp any eq netbios-dgm any access-list 103 permit udp any eq netbios-ns any access-list 103 permit udp any eq netbios-ss any inter vlan 10 ip directed-broadcast 103 exit access-list 104 permit ip 192.168.0.0 0.0.0.255 192.168.4.0 0.0.0.255 access-list 104 permit ip 192.168.1.0 0.0.0.255 192.168.4.0 0.0.0.255 access-list 104 permit ip 192.168.2.0 0.0.0.255 192.168.4.0 0.0.0.255 access-list 104 permit ip 192.168.3.0 0.0.0.255 192.168.4.0 0.0.0.255 access-list 104 permit udp any any eq netbios-dgm access-list 104 permit udp any any eq netbios-ns access-list 104 permit udp any any eq netbios-ss access-list 104 permit udp any eq netbios-dgm any access-list 104 permit udp any eq netbios-ns any access-list 104 permit udp any eq netbios-ss any inter vlan 11 ip directed-broadcast 104 exit inter vlan 10 ip access-group 103 out exit inter vlan 11 ip access-group 104 out end copy run star

各位，还有就是：在一个VLAN里我们有两条线上网，一条是专线（有固定IP地址），另一条是ADSL自动拨号的