ENSP测试配置DHCP和NAT，实现用户动态获取IP地址并访问Internet公网的示例不通

magiccheng1

    故障现象：PC A地址10.10.1.126 连接GE2/0/1地址10.10.1.1,出口为GE2/0/3 ，地址为2.1.1.2。PC A ping10.10.1.1 能通一旦Ping了2.1.12 以后就ping不通10.10.1.1这是什么原因求大侠分析下。包括PC B 一样存在这个问题。
配置如下：
<Huawei>display current-configuration
[V200R003C00]
#
board add 0/2 4GET
#
snmp-agent local-engineid 800007DB03000000000000
snmp-agent
#
clock timezone China-Standard-Time minus 08:00:00
#
portal local-server load flash:/portalpage.zip
#
drop illegal-mac alarm
#
wlan ac-global carrier id other ac id 0
#
set cpu-usage threshold 80 restore 75
#
dhcp enable
#
acl number 2000  
rule 5 permit source 10.10.1.0 0.0.0.255
#
ip pool A
gateway-list 10.10.1.1
network 10.10.1.0 mask 255.255.255.128
excluded-ip-address 10.10.1.2
lease day 72 hour 0 minute 0
dns-list 10.10.1.2
domain-name huawei.com
#
ip pool B
gateway-list 10.10.1.129
network 10.10.1.128 mask 255.255.255.128
lease day 72 hour 0 minute 0
dns-list 10.10.1.2
domain-name huawei.com
#
aaa
authentication-scheme default
authorization-scheme default
accounting-scheme default
domain default
domain default_admin
local-user admin password cipher %$%$K8m.Nt84DZ}e#<0`8bmE3Uw}%$%$
local-user admin service-type http
#
firewall zone Local
priority 15
#
interface Ethernet0/0/0
#
interface Ethernet0/0/1
#
interface Ethernet0/0/2
#
interface Ethernet0/0/3
#
interface Ethernet0/0/4
#
interface Ethernet0/0/5
#
interface Ethernet0/0/6
#
interface Ethernet0/0/7
#
interface GigabitEthernet0/0/0
#
interface GigabitEthernet0/0/1
#
interface GigabitEthernet2/0/0
#
interface GigabitEthernet2/0/1
ip address 10.10.1.1 255.255.255.128
dhcp select global
#
interface GigabitEthernet2/0/2
ip address 10.10.1.129 255.255.255.128
dhcp select global
#
interface GigabitEthernet2/0/3
ip address 2.1.1.2 255.255.255.0
nat outbound 2000
#
interface NULL0
#
ip route-static 0.0.0.0 0.0.0.0 2.1.1.1
#
user-interface con 0
authentication-mode password
user-interface vty 0 4
user-interface vty 16 20
#
wlan ac
#
return