SIP 301 Moved Permanently vs 580 Precondition Failure
SIP 301 (Moved Permanently) is a 3xx Redirection response, while 580 (Precondition Failure) is a 5xx Server Failure response. 301 indicates that the user can no longer be found at the address in the Request-URI. The client should direct future requests to the new address in the Contact header. In contrast, 580 means that the server is unable or unwilling to meet some of the preconditions specified in the request for resource reservation.
Description
The user can no longer be found at the address in the Request-URI. The client should direct future requests to the new address in the Contact header.
When You See It
When a user has permanently changed their SIP address. All future calls should be directed to the new URI.
How to Fix
Update your address book or routing tables to use the new Contact URI provided in the response.
Description
The server is unable or unwilling to meet some of the preconditions specified in the request for resource reservation.
When You See It
When using QoS preconditions (RFC 3312) and the network cannot guarantee the required quality of service for the media session.
How to Fix
Relax the precondition requirements or ensure the network path supports the required QoS. Consider removing precondition requirements for best-effort calls.
Key Differences
301 is a 3xx Redirection response, while 580 is a 5xx Server Failure response.
SIP 301: The user can no longer be found at the address in the Request-URI. The client should direct future requests to the new address in the Contact header.
SIP 580: The server is unable or unwilling to meet some of the preconditions specified in the request for resource reservation.
You encounter 301 when when a user has permanently changed their SIP address. All future calls should be directed to the new URI.
You encounter 580 when when using QoS preconditions (RFC 3312) and the network cannot guarantee the required quality of service for the media session.
When to Use Which
For 301 (Moved Permanently): Update your address book or routing tables to use the new Contact URI provided in the response. For 580 (Precondition Failure): Relax the precondition requirements or ensure the network path supports the required QoS. Consider removing precondition requirements for best-effort calls.