7.1.3. Protocol Errors
7.1.3. Protocol Errors
Errors that fall within the Protocol Error category SHOULD be treated on a per-hop basis, and Diameter proxies MAY attempt to correct the error, if it is possible. Note that these errors MUST only be used in answer messages whose 'E' bit is set.
DIAMETER_COMMAND_UNSUPPORTED 3001
This error code is used when a Diameter entity receives a message with a Command Code that it does not support.
DIAMETER_UNABLE_TO_DELIVER 3002
This error is given when Diameter cannot deliver the message to the destination, either because no host within the realm supporting the required application was available to process the request or because the Destination-Host AVP was given without the associated Destination-Realm AVP.
DIAMETER_REALM_NOT_SERVED 3003
The intended realm of the request is not recognized.
DIAMETER_TOO_BUSY 3004
When returned, a Diameter node SHOULD attempt to send the message to an alternate peer. This error MUST only be used when a specific server is requested, and it cannot provide the requested service.
DIAMETER_LOOP_DETECTED 3005
An agent detected a loop while trying to get the message to the intended recipient. The message MAY be sent to an alternate peer, if one is available, but the peer reporting the error has identified a configuration problem.
DIAMETER_REDIRECT_INDICATION 3006
A redirect agent has determined that the request could not be satisfied locally, and the initiator of the request SHOULD direct the request directly to the server, whose contact information has been added to the response. When set, the Redirect-Host AVP MUST be present.
DIAMETER_APPLICATION_UNSUPPORTED 3007
A request was sent for an application that is not supported.
DIAMETER_INVALID_HDR_BITS 3008
A request was received whose bits in the Diameter header were set either to an invalid combination or to a value that is inconsistent with the Command Code's definition.
DIAMETER_INVALID_AVP_BITS 3009
A request was received that included an AVP whose flag bits are set to an unrecognized value or that is inconsistent with the AVP's definition.
DIAMETER_UNKNOWN_PEER 3010
A CER was received from an unknown peer.