[SR-Users] TCP SYN only

[Daniel-Constantin Mierla]

Hello,

have you increased the max connections limit?

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

The PKG_MEM_POOL_SIZE is more or less same as -m parameter, so you don't 
need to change the sources if you need higher value.

Cheers,
Daniel

On 09/09/14 14:57, Laurent Schweizer wrote:
>
> Hi,
>
> Yes I check them, the only 2 point that I have actually not tested is 
> to change :
>
> - You might have to decrease TCP_BUF_SIZE to a smaller value (e.g 8K)
>
> - You might want to increase PKG_MEM_POOL_SIZE (for large queues)
>
> I’m using Kamailio 3.2.1
>
> I have set:
>
> tcp children to 50
>
> tcp_max_connections=104096
>
> started wit  -m 4096  -M 64
>
> with sockstat I have:
>
> sockets: used 2171
>
> TCP: inuse 913 orphan 1 tw 4 alloc 939 mem 29
>
> UDP: inuse 440 mem 372
>
> UDPLITE: inuse 0
>
> RAW: inuse 1
>
> FRAG: inuse 0 memory 0
>
> BR
>
> Laurent
>
> *De :*sr-users-bounces at lists.sip-router.org 
> [mailto:sr-users-bounces at lists.sip-router.org] *De la part de* 
> Daniel-Constantin Mierla
> *Envoyé :* mardi 9 septembre 2014 14:46
> *À :* Kamailio (SER) - Users Mailing List
> *Objet :* Re: [SR-Users] TCP SYN only
>
> Hello,
>
> have you checked the file in the sources located at doc/tcp_tunning.txt?
>
> Cheers,
> Daniel
>
> On 09/09/14 14:40, Laurent Schweizer wrote:
>
>     Dear all,
>
>       
>
>       
>
>     Since few weeks I have more and more TCP issue, I can see that sometimes the client send a TCP SYN but never get any response.
>
>       
>
>     106.123315 62.12.179.104 -> X.X.X.X  TCP 39174 > sip [SYN] Seq=0 Win=4380 Len=0 MSS=1380 TSV=4294942209 TSER=0 WS=1
>
>     109.124384 62.12.179.104 -> X.X.X.X  TCP 39174 > sip [SYN] Seq=0 Win=4380 Len=0 MSS=1380 TSV=4294942510 TSER=0 WS=1
>
>     111.202946 62.12.179.104 -> X.X.X.X  TCP 4993 > sip [SYN] Seq=0 Win=4380 Len=0 MSS=1380 TSV=4294942717 TSER=0 WS=1
>
>     114.204707 62.12.179.104 -> X.X.X.X  TCP 4993 > sip [SYN] Seq=0 Win=4380 Len=0 MSS=1380 TSV=4294943018 TSER=0 WS=1
>
>       
>
>     I have found on internet many doc regarding TCP and max connection issue and I have already done change in sysctl (see below) to increase the number of tcp connection but seems still not ok.
>
>       
>
>     Any idea ?
>
>       
>
>     Best regards
>
>       
>
>     Laurent
>
>       
>
>       
>
>     /net.ipv4.ip_forward = 0/
>
>     /net.ipv4.conf.default.rp_filter = 1/
>
>     /net.ipv4.conf.default.accept_source_route = 0/
>
>     /kernel.sysrq = 0/
>
>     /kernel.core_uses_pid = 1/
>
>     /net.ipv4.tcp_syncookies = 0/
>
>     /net.bridge.bridge-nf-call-ip6tables = 0/
>
>     /net.bridge.bridge-nf-call-iptables = 0/
>
>     /net.bridge.bridge-nf-call-arptables = 0/
>
>     /kernel.msgmnb = 65536/
>
>     /kernel.msgmax = 65536/
>
>     /kernel.shmmax = 68719476736/
>
>     /kernel.shmall = 4294967296/
>
>     /net.ipv4.tcp_timestamps = 1/
>
>     /net.ipv4.tcp_fin_timeout = 30/
>
>     /net.ipv4.tcp_keepalive_time = 1200/
>
>     /net.ipv4.tcp_max_syn_backlog = 8192/
>
>     /net.ipv4.tcp_max_tw_buckets = 5000/
>
>     /fs.file-max = 2097152/
>
>     /net.ipv4.ip_local_port_range = 2000 65535/
>
>     /net.ipv4.tcp_max_tw_buckets = 1440000/
>
>     /net.ipv4.tcp_tw_recycle = 1/
>
>     /net.ipv4.tcp_tw_reuse = 1/
>
>     /net.core.somaxconn = 65536/
>
>     /net.core.netdev_max_backlog = 65536/
>
>       
>
>       
>
>       
>
>       
>
>       
>
>       
>
>       
>
>
>
>
>     _______________________________________________
>
>     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>
>
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>
>
>
> -- 
> Daniel-Constantin Mierla
> http://twitter.com/#!/miconda  <http://twitter.com/#%21/miconda>  -http://www.linkedin.com/in/miconda
> Next Kamailio Advanced Trainings 2014 -http://www.asipto.com
> Sep 22-25, Berlin, Germany

-- 
Daniel-Constantin Mierla
http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda
Next Kamailio Advanced Trainings 2014 - http://www.asipto.com
Sep 22-25, Berlin, Germany

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