[SR-Users] Recommended configuration for TCP support

[Vitaliy Aleksandrov]

Hi,

I suppose calling set_forward_no_connect() at the LB for a request from 
the registrar to a user will lead to the result. LB won't try to make an 
outgoing tcp/tls connection to reach a requested destination and will 
only forward a request only via existing one.

BR
>
> Thanks for your explanation, the problem is that the actual lookup is 
> done by a proxy which is located after our load balancer. Therefore, 
> the TCP connection with the UA should not be visible by the proxy but 
> by the load balancer.
>
> How does that work in such case?
>
> *From:*sr-users [mailto:sr-users-bounces at lists.sip-router.org] *On 
> Behalf Of *Vitaliy Aleksandrov
> *Sent:* Wednesday, May 06, 2015 10:34 AM
> *To:* sr-users at lists.sip-router.org
> *Subject:* Re: [SR-Users] Recommended configuration for TCP support
>
> *set_forward_no_connect()* called after lookup() prevents kamailio 
> from making a new connection to a phone if there is no active connection.
> This is useful when you are trying to call to a UA which kamailio 
> still keeps registration record for, but TCP/TLS connect to this phone 
> is already gone (due to timeout, network problem, etc...).
>
> On 05/05/15 14:54, Mickael Marrache wrote:
>
>     In general, it happens in our network (as more and more Via
>     headers are added).
>
>     Sorry, I didn't understand your last sentence. What do you mean by
>     not connect if there is no active connection after location lookup?
>
>     *From:*sr-users [mailto:sr-users-bounces at lists.sip-router.org] *On
>     Behalf Of *Daniel-Constantin Mierla
>     *Sent:* Monday, May 04, 2015 11:07 PM
>     *To:* Kamailio (SER) - Users Mailing List
>     *Subject:* Re: [SR-Users] Recommended configuration for TCP support
>
>     Hello,
>
>     where are typically those issues with truncated SDP? On the phones?
>
>     If you use tcp and have phones behind the nat, it is recommended
>     to not connect if there is no active connection after location
>     lookup -- see core functions for tcp.
>
>     Cheers,
>     Daniel
>
>     On 04/05/15 13:54, Mickael Marrache wrote:
>
>         Hi,
>
>         We sometimes get issues caused by truncated SDP bodies.
>         Therefore, we are looking at using TCP instead of UDP.
>
>         What is the recommended configuration when TCP is used?
>
>         Currently, I only have the following:
>
>         children=16
>
>         listen=udp:<ip>:5060
>
>         listen=tcp:<ip>:5060
>
>         disable_tcp=no
>
>         tcp_connection_lifetime=605 (registration expiry is 600)
>
>         Also, is there a difference with UDP regarding NAT handling?
>
>         Thanks,
>
>         Mickael
>
>
>
>
>
>         _______________________________________________
>
>         SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
>
>         sr-users at lists.sip-router.org  <mailto:sr-users at lists.sip-router.org>
>
>         http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
>
>
>
>
>     -- 
>
>     Daniel-Constantin Mierla
>
>     http://twitter.com/#!/miconda  <http://twitter.com/#%21/miconda>  -http://www.linkedin.com/in/miconda
>
>     Kamailio World Conference, May 27-29, 2015
>
>     Berlin, Germany -http://www.kamailioworld.com
>
>
>
>
>     _______________________________________________
>
>     SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
>
>     sr-users at lists.sip-router.org  <mailto:sr-users at lists.sip-router.org>
>
>     http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
>
>
>
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