[SR-Users] TCP keepalive on server and client

[Daniel-Constantin Mierla]

Hello,

tcp_keepalive is setting SO_KEEPALIVE which means sending keeplive by 
kamailio. You can watch network traffic with ngrep/tcpdump/wireshark...

The tcp parameters are documented on wiki:

  http://www.kamailio.org/wiki/cookbooks/devel/core#tcp_keepalive

Cheers,
Daniel

On 2/3/12 11:33 AM, Yufei Tao wrote:
> Hi
>
> I want to use TCP keepalive to detect dead connections between Kamailio
> and my SIP clients. I've got some questions about this:
>
> 1. If I enable it on Kamailio by setting for example:
>
> tcp_crlf_ping = yes
> tcp_keepalive = yes
> tcp_keepidle = 60
> tcp_keepintvl = 10
> tcp_keepcnt = 3
>
>  From what I read by gooling, that means Kamailio only responds to the
> crlfcrlf sent by the client, but can't be configured to send the
> crlfcrlf. Is this right?
>
> 2. On my client, if I use setsockopt to set the corresponding values:
>
>    SO_KEEPALIVE
>    TCP_KEEPCNT
>    TCP_KEEPIDLE
>    TCP_KEEPINTVL
>
> would it make the client send crlfcrlf?
>
> The reason I'm confused is, with these settings, if Kamailio can only
> respond to crlfcrlf, but not send, then would the client only respond
> too, as in 1. and 2., they seem to configure the same set of parameters?
> Please help me clarify this. Thanks very much!
>
> Yufei
>
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> Yufei Tao
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-- 
Daniel-Constantin Mierla -- http://www.asipto.com
http://linkedin.com/in/miconda -- http://twitter.com/miconda