7506E交换机Portal认证

Imc出现大量用户Nas error，400说是交换机的问题，交换机已经过保了，请问要怎么排查？

交换机收发的Syslog日志：

<189>Mar 19 10:29:07 2024 isa_hx_active %%10PORTAL/5/PORTAL_USER_LOGOFF(l): -UserName=[longxianwen1]-IPAddr=[192.168.11.122]-IfName=[Vlan-interface11]-VlanID=[11]-MACAddr=[0000-0000-0000]-Reason=[NAS Error]; User logged off.

<188>Mar 19 10:29:07 2024 isa_hx_active %%10PORTAL/4/PORTAL_ACL_FAILURE(l): -Slot=3; The driver can't find the rule to be deleted.

<189>Mar 19 10:29:07 2024 isa_hx_active %%10PORTAL/5/PORTAL_USER_LOGON_SUCCESS(l): -UserName=[longxianwen1]-IPAddr=[192.168.11.122]-IfName=[Vlan-interface11]-VlanID=[11]-MACAddr=[0000-0000-0000]; User got online successfully.

2024-03-19 10:29:07 192.168.14.3

<190>Mar 19 10:29:07 2024 isa_hx_active %%10RDS/6/RDS_SUCC(l): -IfName=GigabitEthernet3/0/19-VlanId=11-MACAddr=00:00:00:00:00:00-IPAddr=192.168.11.122-IPv6Addr=N/A-UserName=longxianwen1@isn; User got online successfully.