Peers unreachable every time

[raifelipe]

Hello guys!!

I'm trying to solve a problem with peers unreachable.

I extracts a tcpdump of one peer and when the peers become unreachable I see that every time the Asterisk send OPTIONS and the peers reply 200 OK. But when the peers become unreachable, happens a break in which the Asterisk does not send OPTIONS. However I was running a ping in IP address from computer where the peer is logged and the server communicates with the host normally.

It's a problem with the Asterisk that does not sending OPTIONS sometimes?

The Asterisk version is: Asterisk 11.20.0 built by root @ rmtelecompbx on a x86_64 running Linux on 2015-10-17 21:02:16 UTC.

This is session general in the Asterisk sip.conf:
[general]
dtmfmode=rfc2833
notifyringing=yes
context=default
callcounter = yes
srvlookup=yes
disallow=all
allowtransfer=no
rtptimeout=60
language=pt_BR ; Default language setting for all users/peers
allowguest=no
alwaysauthreject=yes
useragent=TotalIPPBX ; Allows you to change the user agent string
registerattempts=10 ; Number of registration attempts before we give up
canreinvite=no
qualify=100000
nat=yes
constantssrc=yes ; Don't change the RTP SSRC when our media stream changes
maxexpirey=1800
defaultexpirey=1800

Can someone help me?

[david55]

No. It is that OPTIONs isn't reaching the peer sometimes.

[raifelipe]

I disagree, because I was running a tcpdump of the server network interface and the server had sent an OPTION that moment would be in log. In the log sees that server send OPTION's every time, but at some point, at an interval of 2 or 3 minutes, the server does not send OPTION and the peers are unreachable.

Why Asterisk server does not send more OPTION's?

https://drive.google.com/file/d/0B0Qmxe1BpsCjU2FvVjR4M0F5bXM/view?usp=sharing