dhcp-snooping arp detection开启后内网共享问题

在S5100交换机做如下的配置后,PC1和PC2的局域网共享文件不正常,是开启DHCP-snooping 和arp detection之后,内网就不能共享文件了吗?

交换机GE1/0/20上联路由器的LAN口,路由器LAN IP 192.168.88.1/24,路由器开启DHCP服务,PC1连交换机的GE1/0/18,PC2连接交换机的GE1/0/19

问题状况是,有时能打开共享文件夹,但是慢,打开共享文件夹后,进行拷贝文件就会断.在终端下显示交换机的上联口即GE1/0/20时断时通,只上外网时一切正常.

如果把交换机恢复出厂配置,就一切正常

H3C]dis cu
#
sysname H3C
#
radius scheme system
#
domain system
#
vlan 1
#
vlan 2
arp detection enable
arp restricted-forwarding enable
#
interface Vlan-interface1
#
interface Aux1/0/0
#
interface GigabitEthernet1/0/1
#
interface GigabitEthernet1/0/2
#
interface GigabitEthernet1/0/3
#
interface GigabitEthernet1/0/4
#                                         
interface GigabitEthernet1/0/5
#
interface GigabitEthernet1/0/6
#
interface GigabitEthernet1/0/7
#
interface GigabitEthernet1/0/8
dhcp-snooping trust
#
interface GigabitEthernet1/0/9
#
interface GigabitEthernet1/0/10
port access vlan 2
#
interface GigabitEthernet1/0/11
port access vlan 2
#
interface GigabitEthernet1/0/12
port access vlan 2
#
interface GigabitEthernet1/0/13
port access vlan 2
#
interface GigabitEthernet1/0/14           
port access vlan 2
#
interface GigabitEthernet1/0/15
port access vlan 2
#
interface GigabitEthernet1/0/16
port access vlan 2
#
interface GigabitEthernet1/0/17
port access vlan 2
#
interface GigabitEthernet1/0/18
port access vlan 2
#
interface GigabitEthernet1/0/19
port access vlan 2
#
interface GigabitEthernet1/0/20
port access vlan 2
dhcp-snooping trust
arp detection trust
#
interface GigabitEthernet1/0/21
port access vlan 2                       
#
interface GigabitEthernet1/0/22
port access vlan 2
#
interface GigabitEthernet1/0/23
port access vlan 2
#
interface GigabitEthernet1/0/24
port access vlan 2
#
interface GigabitEthernet1/0/25
shutdown
port access vlan 2
#
interface GigabitEthernet1/0/26
shutdown
port access vlan 2
#
interface GigabitEthernet1/0/27
shutdown
port access vlan 2
#
interface GigabitEthernet1/0/28
shutdown                                 
port access vlan 2
#
interface NULL0
#
dhcp-snooping
#
ip route-static 0.0.0.0 0.0.0.0 192.168.88.1 preference 60
#
user-interface aux 0
user-interface vty 0 4
#
return

internet--普通路由器--S5100--PC1,PC2