[sip-overload] The frequency of re-negotiating overload control schemes

["Vijay K. Gurbani" <[e-mail]>]

Folks: One of the issues that was left rather underspecified
in draft-ietf-soc-overload-control-02 was how often should
the overload algorithms be re-negotiated.

The -02 version took a rather liberal view and simply said that
implementations must not do it too often, i.e., "... the adjacent
peers MUST NOT renegotiate the overload control algorithm class
per transaction, or per request-response message exchange."

In -03, the text around this is far more conservative and
disallows renegotiations until at least 3600s have elapsed since
the last agreement.  See the newly added Section 5.7 in -03 [1].

Please do read Section 5.7, and if there is a better way to
accomplish renegotiation, please let me know.

[1] 
http://tools.ietf.org/html/draft-ietf-soc-overload-control-03#section-5.7

Thanks,

- vijay
-- 
Vijay K. Gurbani, Bell Laboratories, Alcatel-Lucent
1960 Lucent Lane, Rm. 9C-533, Naperville, Illinois 60566 (USA)
Email: vkg@{bell-labs.com,acm.org} / [e-mail]
Web:   http://ect.bell-labs.com/who/vkg/