# Supported Registration Reply Codes

The following section describes the registration reply codes supported by the system for the HA service.

HA Service Reply Codes

The following registration reply codes are supported by the system’s HA service in accordance with the following Request For Comments (RFCs):

- RFC-2002, IPv4 Mobility, May 1995
- RFC-2344, Reverse Tunneling for Mobile IP, May 1998

Table 1. Supported HA Service Registration Reply Codes

Reply Code (Hex / Base 10) | Description | Note
--- | --- | ---
80H / 128 | Registration Denied - reason unspecified | Sent when internal errors are encountered when processing the Request packet.
81H / 129 | Registration Denied - administratively prohibited | Sent when a newcall policy is set to reject calls or the subscriber is not permitted to use Mobile IP HA services.
82H / 130 | Registration Denied - insufficient resources | Sent when no memory or session managers are available to process the session.
83H / 131 | Registration Denied - mobile node failed authentication | Sent when the mobile node failed authentication.
84H / 132 | Registration Denied - foreign agent failed authentication | Sent when an FA attempted to communicate with the HA service using an incorrect security parameter index (SPI).
85H / 133 | Registration Denied - registration Identification mismatch | Sent when the ID sent by the mobile node in the RRQ is different from the expected value.
86H / 134 | Registration Denied - poorly formed request | Sent when the registration request is poorly formed (i.e. missing an Authentication extension).
87H / 135 | Registration Denied - too many simultaneous mobility bindings | Sent when the mobile node has exceeded the maximum number of mobile bindings that the HA service supports for a single subscriber.
88H / 136 | Registration Denied - unknown home agent address | Sent when HA redirect policy is invoked.
89H / 137 | Registration Denied - reverse tunneling unavailable | Sent when reverse tunneling is requested by the mobile node but it is not enabled on the system.
8AH / 138 | Registration Denied - reverse tunneling mandatory | Sent when reverse tunneling is enabled on the system but is not supported by the mobile node.
8BH / 139 | Registration Denied - reverse tunneling encapsulation style unavailable | Sent if the Encapsulating Delivery Style Extension sent by the mobile is not supported by the HA service.
8DH / 141 | Registration Denied - unsupported Vendor-ID or unable to interpret Vendor-CVSE-Type. | Sent if the Vendor Identification is unsupported or the HA is unable to interpret the Vendor-CVSE-Type in the CVSE sent by the Foreign Agent to the Home Agent.
8EH/142 | Registration Denied - Requested UDP tunnel encapsulation unavailable | Sent by the HA if a UDP tunneling mode is not available.