[Freeswitch-users] TCP vs UDP SIP

[Spencer Thomason]

Hi Jeff,
Thanks for the insight.  Forgive my ignorance but if I have two Identical Freeswitch servers with SRV records and endpoints that properly support SRVs, why do I loose the ability to failover if one host is not reachable?

Also as many of these end points are Polycoms behind NAT, I can't see any reason I'd still need NDLB-force-rport on the profile?

Since these are application servers, handling conferences, presence, etc., I'd imagine I would hit other bottlenecks before I hit the TCP connection limit.

On May 8, 2013, at 9:51 AM, "Jeff Leung" <jleung at v10networks.ca> wrote:

> 
> 
>> -----Original Message-----
>> From: freeswitch-users-bounces at lists.freeswitch.org [mailto:freeswitch-
>> users-bounces at lists.freeswitch.org] On Behalf Of Vik Killa
>> Sent: Wednesday, May 8, 2013 9:18 AM
>> To: FreeSWITCH Users Help
>> Subject: Re: [Freeswitch-users] TCP vs UDP SIP
> 
> That I would agree with, but the thing is you lose the capability of
> failover in the unlikely event that a node in a FreeSWITCH cluster fail.
> 
>> In my opinion, TCP seems better than UDP as you know all the SIP packets
>> are making to their destination.
>> 
>> On Wed, May 8, 2013 at 11:37 AM, Jeff Leung <jleung at v10networks.ca>
>> wrote:
>> 
>> 
>>    On a Linux system there is a limit of how many open TCP connections
>> you have.
> 
> If I can remember correctly, I think Darren from 2600hz did discuss about
> the limit of open TCP connections you can have on a Linux system. Correct me
> if I'm wrong on this, but that seems to be the case. And I have seen
> instances of that happening on a misconfigured Squid Proxy
> 
>> I never heard this before...where and how it this limit defined?
>> 
>> 
>>    Unless you have a crazy amount of endpoints you have to serve, TCP
>> probably isn't really worth it in my opinion.
> 
> Assuming it's one Open TCP connection per endpoint,  you'd probably need
> more endpoints than the maximum amount of open TCP connections to hit that
> problem
> 
>> How many endpoints?
>> 
>> 
>>    Also did I also mention that TCP connections don't really fix NAT
>> issues?
> 
> 
> 
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