T1 AND E1 REMOTE ACCESS CONCENTRATORS
48
Table 4-2. Supported RADIUS-Packet Attributes (continued)
ID
Attribute Name
Comments
8
Framed-IP-Address Access-Accept may contain this attribute, which indicates the IP address
assigned to the remote device. If the attribute is 255.255.255.255, the NAS
(Network Access Server—the Concentrator in this case) should allow the user
to select an address. If it is 255.255.255.254, the NAS should select an address
for the user. Accounting-Request will also contain this attribute.
If the Framed-IP-Address attribute is not specified in an Access-Accept
message, or if it is specified as being 255.255.255.255, the Concentrator will
attempt to establish a WAN Unnumbered connection with the remote device.
If the Framed-IP-Address attribute is specified in an Access-Accept message
as something other than 255.255.255.255, the Concentrator will attempt to
establish a WAN Direct Host connection with the remote device. When
establishing the WAN Direct Host connection, the Concentrator will only allow
the remote device to use the IP address specified in the Framed-IP-Address
attribute. A WAN Direct Host remote device must be assigned an IP address
by either CSM or a RADIUS server.
22
Framed-Route
Up to five routes can be specified for a remote device. This attribute contains
a destination prefix in dotted quad form, optionally followed by a slash and a
decimal length specifier stating how many high-order bits of the prefix should
be used. That is followed by a space, a gateway address in dotted quad form,
another space, and a metric. An example of this full form would be
“192.168.1.0/24 0.0.0.0 2”.
The length specifier may be omitted, in which case it defaults to 8 bits for
class-A prefixes, 16 bits for class-B prefixes, and 24 bits for class-C prefixes.
An example of this shortened form would be “192.168.1.0 0.0.0.0 2”.
When the gateway address is specified as “0.0.0.0”, the IP address of the
device is used as the gateway address. “0.0.0.0” is the only gateway address
we support. If any other gateway address is encountered, it is ignored, and the
gateway address is treated as if it had been configured as “0.0.0.0”.
25
Class
Used for accounting. Allows for different classes of users. If the Class attribute
is returned to the Concentrator in an Access-Accept message for a call, it will
be reported in Accounting-Request messages that pertain to the call.
30
Called-Station-Id
In Access-Request and Accounting-Request.
31
Calling-Station-Id
In Access-Request and Accounting-Request. This attribute is only reported
when the Calling-Station-Id is reported to the Concentrator by the ISDN switch.