RFC Errata
RFC 4028, "Session Timers in the Session Initiation Protocol (SIP)", April 2005
Source of RFC: sip (rai)See Also: RFC 4028 w/ inline errata
Errata ID: 4056
Status: Verified
Type: Editorial
Publication Format(s) : TEXT
Reported By: Lucas Wang
Date Reported: 2014-07-17
Verifier Name: Orie Steele
Date Verified: 2024-03-29
Section 8 says:
8. Proxy Behavior Session timers are mostly of interest to call stateful proxy servers (that is, to servers that maintain the state of calls and dialogs established through them). However, a stateful proxy server (that is, a server which is aware of transaction state but does not retain call or dialog state) MAY also follow the rules described here. Stateless proxies MUST NOT attempt to request session timers. Proxies that ask for session timers SHOULD record-route, as they won't receive refreshes if they don't.
It should say:
Session timers are mostly of interest to call stateful proxy servers (that is, to servers that maintain the state of calls and dialogs established through them). However, a stateless proxy server (that is, a server which is aware of transaction state but does not retain call or dialog state) MAY also follow the rules described here. Stateless proxies MUST NOT attempt to request session timers. Proxies that ask for session timers SHOULD record-route, as they won't receive refreshes if they don't.
Notes:
After the "However", it should be a stateless proxy server.