IPM和ac做的无感知认证，用户当天上线是无感知，第二天就会再弹认证页面

IPM中无感知配置：

AC配置如下：

#
wlan service-template 1
ssid INT
vlan 200
client forwarding-location ap vlan 200
portal enable method direct
portal domain portal
portal bas-ip 172.16.100.2
portal apply web-server portal
portal apply mac-trigger-server portal
portal temp-pass enable
service-template enable
#

#
radius session-control enable
#
radius scheme portal
primary authentication 172.16.20.2
primary accounting 172.16.20.2
key authentication cipher $c$3$LbCTxoEe4HTdI5VrPLs+XEQcA0AeyFVEZxjDR1Vb
key accounting cipher $c$3$7bsRGTNS2jGU+W5L/9cNwp2xj4BA0btv4M9qrk9L
user-name-format without-domain
nas-ip 172.16.100.2
#
radius dynamic-author server
client ip 172.16.20.2 key cipher $c$3$QCsFr1Cg7xq6asZBlmnlxdlavYs0fanTHsaYGeR/
#
domain portal
authorization-attribute idle-cut 15 1024
authentication portal radius-scheme portal
authorization portal radius-scheme portal
accounting portal radius-scheme portal
#

#
portal web-server portal
url http://172.16.20.2:8080/wsmAuth/iportal/
url-parameter apmac ap-mac
url-parameter devType value v7
url-parameter nasip value 172.16.100.2
url-parameter ssid value INT
url-parameter userip source-address
url-parameter usermac source-mac
#
portal server portal
ip 172.16.20.2 key cipher $c$3$qc1/2cm89D9KPUCu0/ZvfBL153iauaqgoAfK2zDQ
#
netconf soap http enable
#
portal mac-trigger-server portal
ip 172.16.20.2
#

用户地址池配置的租期是8小时

麻烦大家帮我看下可能是哪些方面的问题，谢谢！