SIP 204 No Notification vs 483 Too Many Hops
SIP 204 (No Notification) is a 2xx Success response, while 483 (Too Many Hops) is a 4xx Client 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, 483 means that the Max-Forwards header has reached zero, indicating the request has passed through too many proxies.
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 Max-Forwards header has reached zero, indicating the request has passed through too many proxies.
Quando você o vê
When a request traverses more proxies than the Max-Forwards counter allows (default 70). Often indicates a routing loop.
Como corrigir
Check for routing loops. If the path is legitimately long, increase Max-Forwards. Usually indicates misconfigured routing.
Diferenças principais
204 is a 2xx Success response, while 483 is a 4xx Client Failure response.
SIP 204: The request was successful but the server has decided not to send a NOTIFY for this SUBSCRIBE request.
SIP 483: The Max-Forwards header has reached zero, indicating the request has passed through too many proxies.
You encounter 204 when when subscribing to event packages that may not generate immediate notifications, such as dialog or presence packages.
You encounter 483 when when a request traverses more proxies than the Max-Forwards counter allows (default 70). Often indicates a routing loop.
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 483 (Too Many Hops): Check for routing loops. If the path is legitimately long, increase Max-Forwards. Usually indicates misconfigured routing.