SIP 301 Moved Permanently vs 413 Request Entity Too Large
SIP 301 (Moved Permanently) is a 3xx Redirection response, while 413 (Request Entity Too Large) is a 4xx Client 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, 413 means that the server is refusing to process the request because the message body is larger than the server is willing to accept.
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 refusing to process the request because the message body is larger than the server is willing to accept.
When You See It
When sending a SIP message with a body (SDP, XML, etc.) that exceeds the server's size limit.
How to Fix
Reduce the size of the message body. For SDP, minimize codec offers or remove unnecessary attributes.
Key Differences
301 is a 3xx Redirection response, while 413 is a 4xx Client 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 413: The server is refusing to process the request because the message body is larger than the server is willing to accept.
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 413 when when sending a SIP message with a body (SDP, XML, etc.) that exceeds the server's size limit.
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 413 (Request Entity Too Large): Reduce the size of the message body. For SDP, minimize codec offers or remove unnecessary attributes.