Hi,

>>But, again, HOW does the edge proxy know that the UA actually will use CRLF? 
>>If it doesn't know, it may use short 
>>registration timer.
>
>it DOES NOT NEED KNOW, because the UA knows and uses short registration 
>interval.
 
So, you are saying the following: if the UA does not support CRLF the UA itself 
will include a short registration interval in the REGISTER request?
 
That is not standardized behavior either, and I am not sure that is how UAs 
work.

>>>"It is RECOMMENDED that the UA uses CRLF for TCP keep-alive even if
>>>the UA doesn't receive keep=true, unless the UA receives a
>>>registration refresh timer value which is equal or less than the UA's
>>>default keep-alive interval in which case the registration refreshes
>>>will act as keep-alives."
>> 
>>I think that is what Juha proposed some e-mails ago.
>
>i didn't say anything about register timers.  i said that tcp UA should
>send CRLFs even if it does not get back CRLF.  but now when we have
>thought this more, because tcp UA anyway sends CRLFs, it makes no sense
>to try to negotiate it.  so please limit your keep protocol to udp UAs
>only.
 
You said the following:
 
"you can write that if registration interval would be as short as default 
keepalive interval then it is not recommended to send
keepalives."
 
Regards,
 
Christer
 


 
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