AC是2504，其中有2台1602I-C-K9，怎么都注册不上，通过debug发现是country code的问题。
检查过AC上设置没有错，是CN，其他的AP都注册上来了。
通过show capwap client config
发现country code是^@^@^@
第一次见到这样的情况，请问我该怎么处理？
===============AP===================
AP1c6a.7aac.fdc9#sh capwap client config
configMagicMark 0xF1E2D3C4
chkSumV2 7197
chkSumV1 48167
swVer 8.0.115.0
adminState ADMIN_ENABLED(1)
name AP1c6a.7aac.fdc9
location default location
group name
mwarName
mwarIPAddress 0.0.0.0
mwarName
mwarIPAddress 0.0.0.0
mwarName
mwarIPAddress 0.0.0.0
ssh status Disabled
Telnet status Disabled
numOfSlots 2
spamRebootOnAssert 1
spamStatTimer 180
randSeed 0x8F0F
transport SPAM_TRANSPORT_L3(2)
transportCfg SPAM_TRANSPORT_DEFAULT(0)
initialisation SPAM_PRODUCTION_DISCOVERY(1)
ApMode Local
ApSubMode Not Configured
Link-Encryption Disabled
Mwar DTLS Capability Disabled
AP Rogue Detection Mode Enabled
OfficeExtend AP [0] Disabled
OfficeExtend AP JoinMode[0] Standard
Discovery Timer 10 secs
Heart Beat Timer 30 secs
Led State Enabled 1
Primed Interval 0
Syslog server 255.255.255.255
Prefer-mode Un-configured
AP ILP Pre-Standard Switch Support Disabled
AP Power Injector Disabled
Infrastructure MFP validation Enabled
non-occupancy channels: 140
Ethernet (Duplex/Speed) auto/auto
AUX EthernetPortState ADMIN_DISABLED
Slot 0
adminstate ADMIN_ENABLED(1)
radioType RADIO_TYPE_80211bg
RadioMode Local
CleanAirAdminState Enabled
countryCode ^@^@^@
countryISOCode ^@^@^@
chanAutoCfg CONFIG_AUTO
channel 13
channel width 20
extension channel none(0)
txPowerAutoCfg CONFIG_AUTO
txPowerLevel 0
diversitySelection DIVERSITY_ENABLED
htRxAntennaSelection 00
htTxAntennaSelection 00
beamformCfg 03
Antenna Mode ANTENNA_OMNI
antennaSelection_0 INTERNAL_ANTENNA
antennaSelection_1 INTERNAL_ANTENNA
antennaSelection_2 INTERNAL_ANTENNA
antennaSelection_3 INTERNAL_ANTENNA
twiceExtAntennaGain 0
Profile Mode CONFIG_AUTO
Load Profile
rfBusyThreshold 0
numClientsThreshold 0
bytesPerSecThreshold 0
Interference Profile
InterferenceThreshold 0
Noise Profile
NoiseThreshold 0
Coverage Profile
SNRThreshold 0
ExceptionThreshold 0
minClientsThreshold 0
11gSupport Enabled
CCX RM Mode CONFIG_AUTO
CCX RM Config
rm state 0
rm meas interval 0
rts enabled 0
rts threshold 2347
LOMM optimization 0
LOMM Number of Channels 0
channel[0] = 0, channel[1] = 0, channel[2] = 0, channel[3] = 0,
FMC HS AP Type is 0, Threshhold 0
Slot 1
adminstate ADMIN_ENABLED(1)
radioType RADIO_TYPE_80211a
RadioMode Local
CleanAirAdminState Enabled
countryCode ^@^@^@
countryISOCode ^@^@^@
chanAutoCfg CONFIG_AUTO
channel 140
channel width 20
extension channel none(0)
txPowerAutoCfg CONFIG_AUTO
txPowerLevel 0
diversitySelection DIVERSITY_ENABLED
htRxAntennaSelection 00
htTxAntennaSelection 00
beamformCfg 03
Antenna Mode ANTENNA_OMNI
antennaSelection_0 INTERNAL_ANTENNA
antennaSelection_1 INTERNAL_ANTENNA
antennaSelection_2 INTERNAL_ANTENNA
antennaSelection_3 INTERNAL_ANTENNA
twiceExtAntennaGain 0
Profile Mode CONFIG_AUTO
Load Profile
rfBusyThreshold 0
numClientsThreshold 0
bytesPerSecThreshold 0
Interference Profile
InterferenceThreshold 0
Noise Profile
NoiseThreshold 0
Coverage Profile
SNRThreshold 0
ExceptionThreshold 0
minClientsThreshold 0
11gSupport Disabled
CCX RM Mode CONFIG_AUTO
CCX RM Config
rm state 0
rm meas interval 0
rts enabled 0
rts threshold 2347
LOMM optimization 0
LOMM Number of Channels 0
channel[0] = 0, channel[1] = 0, channel[2] = 0, channel[3] = 0,
FMC HS AP Type is 0, Threshhold 0
AP failure counters: LinkFailure = 14, SpamReboots = 1, ApCrashes = 0
AP join priority = 1
AP lsc enable = 0
AP lsc reboot cnt = 0
AP lsc max num of Retry = 3
Mesh AP lsc enable = 0
AP retransmit count = 255
AP retransmit timer = 255
AP vlan tag status = Disabled
SSC Controller Hash validation enabled.
IPv6 Capwap UDP Lite Un-configured
IPv4 Tcp MSS Adjust : Disabled
IPv6 TCP MSS Adjust Disabled
==================================