[SR-Users] Several Asterisk on this same IP

[anfecora]

WHy not installing rtpproxy and proxying all rtp to the inside uase
kamailio to load balance them, it will be transparent on the inside perhaps
a cleaner solution?

On Mon, Mar 13, 2017 at 3:21 PM, Kjeld Flarup <kfc at viptel.dk> wrote:

> As I recall it is sequential, but not from the start everytime, it is
> incrementing all the time.
>
> If You are running three servers, then with a 100% identical load, one
> would expect an average of 2 failing attempts per call.
>
> The reality I see is however often very different RTP ports, most likely
> because load isn't 100% identical.
>
>
> Med venlig hilsen / Best regards
> Kjeld Flarup (Christensen) M.Sc E.E, Teknisk chef
> Viptel ApS, Hammershusvej 16C, DK-7400 Herning
> Telefon: +45 46949949, Telefax: +45 46949950, http://viptel.dk
>
> On 03/13/2017 11:05 PM, Alex Balashov wrote:
>
>> Well, indeed, but a sequential scan of many consecutive ports like this
>> from the bottom of the same range can be quite a latent operation. So at
>> the very least the allocation strategy would benefit from being random.
>> Does Asterisk take that approach?
>>
>> On March 13, 2017 6:04:06 PM EDT, Kjeld Flarup <kfc at viptel.dk> wrote:
>>
>>> No there is no such thing as magic.
>>>
>>> The most obvious way to implement the RTP port handling, is to first
>>> open the next UDP port in the OS, and then report that back in the
>>> Invite/200Ok. If the port cannot be opened, then simply try the next in
>>>
>>> line.
>>>
>>>
>>> Med venlig hilsen / Best regards
>>> Kjeld Flarup (Christensen) M.Sc E.E, Teknisk chef
>>> Viptel ApS, Hammershusvej 16C, DK-7400 Herning
>>> Telefon: +45 46949949, Telefax: +45 46949950, http://viptel.dk
>>>
>>> On 03/13/2017 01:52 PM, przeqpiciel wrote:
>>>
>>>> Maybe there is an magic device? I know that if we have an asterisk,
>>>> that become to us with default configuration of rtp ports sets to
>>>> 10000_20000. And each call choose the one port fron that range. So if
>>>> we have several asterisks with default configuratiin of rtp, there is
>>>> possibilities to have 2 concurent calls each through another asterisk
>>>> instance with this same rtp port. Am i right?
>>>>
>>>> So mqybe this magic device could see source IP address and route rtp
>>>> to correct adterisk?
>>>>
>>>> 13.03.2017 7:15 AM "Alex Balashov" <abalashov at evaristesys.com
>>>> <mailto:abalashov at evaristesys.com>> napisał(a):
>>>>
>>>>      On Mon, Mar 13, 2017 at 07:08:09AM +0100, Kjeld Flarup wrote:
>>>>
>>>>      > We run multiple Asterisk instances since 1.4 and never
>>>>      configured RTP ports.
>>>>      >
>>>>      > More challenging issues are the Asterisk DB, and the Asteisk
>>>>
>>> home.
>>>
>>>>      You may not have enough calls for RTP port collisions to become
>>>>
>>> an
>>>
>>>>      issue. Otherwise, I'm not sure how you're avoiding it, since
>>>>
>>> Asterisk
>>>
>>>>      isn't aware of which ports from within the range are in use.
>>>>
>>>>      --
>>>>      Alex Balashov | Principal | Evariste Systems LLC
>>>>
>>>>      Tel: +1-706-510-6800 <tel:%2B1-706-510-6800> / +1-800-250-5920
>>>>      <tel:%2B1-800-250-5920> (toll-free)
>>>>      Web: http://www.evaristesys.com/, http://www.csrpswitch.com/
>>>>
>>>>      _______________________________________________
>>>>      SIP Express Router (SER) and Kamailio (OpenSER) - sr-users
>>>>
>>> mailing
>>>
>>>>      list
>>>>      sr-users at lists.sip-router.org
>>>>
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>>>
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>>>>
>>>>
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>>>>
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>>>
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>>>>
>>>
>> -- Alex
>>
>> --
>> Principal, Evariste Systems LLC (www.evaristesys.com)
>>
>> Sent from my Google Nexus.
>>
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>
>
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