SIP 204 No Notification vs 513 Message Too Large
SIP 204 (No Notification) is a 2xx Success response, while 513 (Message Too Large) is a 5xx Server Failure response. 204 indicates that the request was successful but the server has decided not to send a NOTIFY for this SUBSCRIBE request. In contrast, 513 means that the server was unable to process the request since the entire SIP message (not just the body) exceeded the size limit.
Descrição
The request was successful but the server has decided not to send a NOTIFY for this SUBSCRIBE request.
Quando você o vê
When subscribing to event packages that may not generate immediate notifications, such as dialog or presence packages.
Como corrigir
No fix needed. The subscription was accepted but there is no state change to notify about yet.
Descrição
The server was unable to process the request since the entire SIP message (not just the body) exceeded the size limit.
Quando você o vê
When the total SIP message (headers + body) is too large. Different from 413 which refers only to the body.
Como corrigir
Reduce the message size by removing unnecessary headers or reducing the SDP size. Consider using UDP-compatible message sizes (< 1300 bytes).
Diferenças principais
204 is a 2xx Success response, while 513 is a 5xx Server Failure response.
SIP 204: The request was successful but the server has decided not to send a NOTIFY for this SUBSCRIBE request.
SIP 513: The server was unable to process the request since the entire SIP message (not just the body) exceeded the size limit.
You encounter 204 when when subscribing to event packages that may not generate immediate notifications, such as dialog or presence packages.
You encounter 513 when when the total SIP message (headers + body) is too large. Different from 413 which refers only to the body.
Quando usar qual
For 204 (No Notification): No fix needed. The subscription was accepted but there is no state change to notify about yet. For 513 (Message Too Large): Reduce the message size by removing unnecessary headers or reducing the SDP size. Consider using UDP-compatible message sizes (< 1300 bytes).