Supported IETF Attributes in RFC 5176
Some of the supported IETF attributes for RADIUS are listed in the following table.
Supported IETF Attributes
| Attribute Name | Attribute Number | Description |
|---|---|---|
| NAS-IP-Address | 4 | IPv4 address of NAS |
| NAS-Identifier | 32 | The port where the session is terminated |
| NAS-IPv6-Address | 95 | IPv6 address of NAS |
| Calling-Station-Id | 31 | Link address from which sessions are connected |
| Filter-ID | 11 | The name of a data filter list to be applied for the sessions that the identification attributes map to |
Error Clause Values
When the NAS cannot honor the disconnect message and CoA requests, the NAS sends corresponding NAK responses. These responses must include the error cause attribute to provide more details on the possible cause of the problem. The format of this error cause attribute is the same as any other attribute, and the value field consists of a 4-byte integer.
The error cause attribute values are organized in the following series:
Error Cause Values
| Value | Description |
|---|---|
| 401 | Unsupported attribute |
| 402 | Missing attribute |
| 403 | NAS identification mismatch |
| 404 | Invalid Request |
| 405 | Unsupported services |
| 407 | Invalid attribute value |
| 501 | Administratively prohibited (used when a CoA request or disconnect message is ignored because of configuration) |
| 503 | Session context not found |
| 506 | Resources unavailable |