[Asterisk-Users] Asterisk and network problems

[Andrew Latham]

What type of modem are you using. If Zyxel or other consumer level try
restarting and feel the box to see if it is hot. I do like the
consumer level products but heat is there enemy. This could also be
caused by out of date DNS server settings.

On 4/16/05, Wilson Pickett <spamsucks2005 at gmail.com> wrote:
> Slightly OT but if you know much about networks, please read and maybe you
> can suggest some things.
>  
>  I have been running asterisk for about 1 year. Currently running 1.0.6 with
> 2 X100P and 1 TDM400P with 3 FXS modules on a Pentium III-800 with 512M RAM.
> The system performs very well for both POTS and voIP. 
>  
>  The box is connected to a fixed ip DSL line at 2048/256.
>  It registers with several SIP and IAX providers, three remote SIP phones,
> one remote IAXy.
>  
>  There is often one provider or phone that will become unreachable for a
> moment, and I'm sure this happens on most DSL soho/home type connections. It
> isn't a problem and doesn't usually cause any symptoms except perhaps very
> occasional breaking up.
>  
>  About 10 days ago, I started seeing message where ALL providers and phones
> would become "UNREACHABLE" for about 10 seconds, then the same packagae of
> messages saying they were now REACHABLE. This happens about every 20-60
> minutes, usually at least once every two hours or so. 
>  
>  When this UNREACHABLE messages begins, ALL network data flow stops. If I am
> in ssh session, it looks like a disconnect, but about 10 secs later, I have
> the console again. 
>  
>  Naturally, I contacted our ISP who finally saw some packet loss at the same
> time as I saw the "freeze". They contacted their upstream who didn't see any
> problems and now they are contacting the phone company. 
>  
>  I have tried the following debug techniques:
>  
>  1) watched traffic on another box connected to same router and see same
> problem (ping stops)
>  2) swapped out router - problem persisted
>  3) changed eth0 card 
>  4) swapped DSL phone filter and disconnected other extension
>  5) did a tcpdump and caught a freeze but see nothing unusual in the traffic
>  
>  Needless to say, this condition makes voIP useless at a professional level.
> For personal use we need to tell people that if they suddenly hear silence
> for 10 seconds to "hold on and wait til the connection comes back", not
> really great.
>  
>  While I'm waiting for the third service to check, if anyone has any
> suggestions or ideas to pursue, please send them either on or off list.
>  
>  tia
>  
> _______________________________________________
> Asterisk-Users mailing list
> Asterisk-Users at lists.digium.com
> http://lists.digium.com/mailman/listinfo/asterisk-users
> To UNSUBSCRIBE or update options visit:
>   
> http://lists.digium.com/mailman/listinfo/asterisk-users
> 
> 


-- 
Andrew Latham

http://www.lathama.com
lathama at gmail.com
lathama at yahoo.com
lathama at lathama.com
If any of the above are not working,
we have bigger problems than my email.