用ACL来实现，具体如下：
acl number 3002
rule deny ip source 192.168.1.0 0.0.0.255 destination 192.168.2.0 0.0.0.255
acl number 3003
rule deny ip source 192.168.2.0 0.0.0.255 destination 192.168.1.0 0.0.0.255
用traffic-filter在vlan下应用ACL，
traffic-filter vlan 2 inbound acl 3002
traffic-filter vlan 3 inbound acl 3003
查看 acl
dis acl 3002
删除 acl 删除 过滤
undo acl 3002
undo acl 3003
undo traffic-filter vlan 2 inbound acl 3002
undo traffic-filter vlan 2 inbound acl 3003