Cisco Catalyst 2960 Series User Manual

ExplanationValue
Request Initiated507
Multiple Session Selection Unsupported508
Preconditions
To use the CoA interface, a session must already exist on the switch. CoA can be used to identify a session
and enforce a disconnect request. The update affects only the specified session.
CoA Request Response Code
The CoA Request response code can be used to convey a command to the switch.
The packet format for a CoA Request Response code as defined in RFC 5176 consists of the following fields:
Code, Identifier, Length, Authenticator, and Attributes in the Type:Length:Value (TLV) format. The Attributes
field is used to carry Cisco vendor-specific attributes (VSAs).
Session Identification
For disconnect and CoA requests targeted at a particular session, the switch locates the session based on one
or more of the following attributes:
•
Acct-Session-Id (IETF attribute #44)
•
Audit-Session-Id (Cisco VSA)
•
Calling-Station-Id (IETF attribute #31 which contains the host MAC address)
•
IPv6 Attributes, which can be one of the following:
•
Framed-IPv6-Prefix (IETF attribute #97) and Framed-Interface-Id (IETF attribute #96), which
together create a full IPv6 address per RFC 3162
•
Framed-IPv6-Address
•
Plain IP Address (IETF attribute #8)
Unless all session identification attributes included in the CoA message match the session, the switch returns
a Disconnect-NAK or CoA-NAK with the “Invalid Attribute Value” error-code attribute.
If more than one session identification attribute is included in the message, all the attributes must match the
session or the switch returns a Disconnect- negative acknowledgment (NAK) or CoA-NAK with the error
code “Invalid Attribute Value.”
The packet format for a CoA Request code as defined in RFC 5176 consists of the fields: Code, Identifier,
Length, Authenticator, and Attributes in Type:Length:Value (TLV) format.
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Consolidated Platform Configuration Guide, Cisco IOS Release 15.2(4)E (Catalyst 2960-X Switches)
965
Information About RADIUS Change-of-Authorization

Cisco Catalyst 2960 Series Specifications

General

Layer	Layer 2
Power over Ethernet (PoE)	Available on some models
RAM	128 MB
Flash Memory	32 MB
MAC Address Table Size	8000
Operating Temperature	0°C to 45°C (32 to 113°F)
Ports	24 or 48 x 10/100/1000