s12508核心交换机portal认证失败

网关在核心S12508上，在S12508做portal认证失败，核心版本是Version 5.20, Release 1828P0，imc版本是7.3E0605H05,EIA版本是7.3E0510H08;

核心portal认证配置

int Vlan-interface 250

 ip add 172.30.30.254 24

 portal server portal_server method direct

 portal domain portal_domain 

 portal nas-ip 192.168.201.1

#

radius scheme aaa 

 server-type extended primary authentication 172.28.0.45

 primary accounting 172.28.0.45 

 key authentication simple nn2yy 

key accounting simple nn2yy 

user-name-format without-domain 

 nas-ip 192.168.201.1

#

domain portal_domain 

 authentication portal radius-scheme aaa 

 authorization portal radius-scheme aaa 

 accounting portal radius-scheme aaa

 #

portal server portal_server ip 172.28.0.45 key nn2yy url http://172.28.0.45/portal

#

IMC侧配置

现象

其中核心地址192.168.201.1

IMC地址是172.28.0.45