On 1/22/15 5:54 AM, Brett Tate wrote:
What value the UAC should use in Expires header
on the next REGISTER refresh?
It can basically use whatever it wants. However if it wants to avoid
potentially receiving another 423, using a value >= last Min-Expires would
be best.
I pragmatically agree with Brett here. But this is a problem caused by
the SBC. It is behaving perversely, presenting the UAC with an ambiguity.
ISTM that it would be better for the SBC to behave better. It should
keep the actual expiration time of the registrar to itself, and
independently manage the expiration time (and Min-Expires) on the leg to
the UAC.
Thanks,
Paul
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