关于HCNA静态NAT的问题

纠结…跳跳琥

拓扑图如下：

R1就配了两个端口IP，还有缺省静态路由，然后在GI0/0/1口配置了static nat

nat static global 12.1.1.6 inside 192.168.31.2

R2就配了端口IP1.6，另一个环回接口配了9.9.9.9

以下是R1的dis cu

[R1]dis cu
[V200R003C00]
#
sysname R1
#
snmp-agent local-engineid 800007DB03000000000000
snmp-agent
#
clock timezone China-Standard-Time minus 08:00:00
#
portal local-server load portalpage.zip
#
drop illegal-mac alarm
#
undo info-center enable
#
set cpu-usage threshold 80 restore 75
#
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
#
nat static global 12.1.1.6 inside 192.168.31.2 netmask 255.255.255.255
#
interface GigabitEthernet0/0/0
ip address 192.168.31.1 255.255.255.0
#
interface GigabitEthernet0/0/1
ip address 12.1.1.1 255.255.255.248
#
interface GigabitEthernet0/0/2
#
interface NULL0
#
ip route-static 0.0.0.0 0.0.0.0 12.1.1.6
#
user-interface con 0
authentication-mode password
user-interface vty 0 4
user-interface vty 16 20
#
wlan ac
#
return

R2 dis cu[R2]dis cu
[V200R003C00]
#
sysname R2
#
snmp-agent local-engineid 800007DB03000000000000
snmp-agent
#
clock timezone China-Standard-Time minus 08:00:00
#
portal local-server load portalpage.zip
#
drop illegal-mac alarm
#
undo info-center enable
#
set cpu-usage threshold 80 restore 75
#
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 GigabitEthernet0/0/0
ip address 12.1.1.6 255.255.255.248
#
interface GigabitEthernet0/0/1
#
interface GigabitEthernet0/0/2
#
interface NULL0
#
interface LoopBack0
ip address 9.9.9.9 255.255.255.0
#
user-interface con 0
authentication-mode password
user-interface vty 0 4
user-interface vty 16 20
#
wlan ac
#
return


问题来了：

1：我明明仅做了31.2对R2而已啊，为什么我31.3都能ping通9.9.9.9

2：还有就是我抓包R1的Gi0/0/1，线已经是蓝色，但是没东西显示，抓GI0/0/0就有，PC抓包也有数据包流通

求解，谢谢