[asterisk-users] Re: Input on Dundi

[Jeffery Fan Chen]

hi, all,

I have realized a dundi cluster,,,
the details, please read...
http://jefferychen1977.spaces.live.com/blog/cns!9E49EEC4251C4476!494.entry

Thanks,...




On 12/13/06, David Thomas <punknow at gmail.com> wrote:
>
> On 12/12/06, JR Richardson <jmr.richardson at gmail.com> wrote:
> > > 1.)  When a registration server fails there doesn't seem to be an easy
> > > way to have clients automatically register to a new server. (our
> > > clients are mostly other asterisk boxes.) To solve this we are
> > > considering using DNS failover.
> >
> > When registering with an Asterisk server to an Asterisk cluster of
> > servers, for the purpose of traversing a NAT or something else (to
> > solve a problem where direct contact cannot be performed), I would
> > suggest doing multiple registration to two registration servers, using
> > different names.
> >
> > Like
> > registration [name1] to registration server 1
> > registration [name2] to registration server 2
> >
> > in the outgoing dilaplan
> >
> > exten => _NXXNXXXXXX,1,Dial(IAX2/server1......|j)
> > exten => _NXXNXXXXXX,102,Dial(IAX2/server2......
> >
> > so if server one is not there the call will jump to the next server
> >
> > or
> >
> > exten => _NXXNXXXXXX,1,Dial(IAX2/server1&IAX2/server2.............
> >
> > first server to answer will get the call.
> >
> > you can do something similar calling from the cluster to the end
> Asterisk server
> > dundi lookup for [name1] if not available lookup [name2]
> >
> > >
> > > 2.)  If you plan to do any direct routing using the fullcontact
> > > address like what is shown in JR's whitepaper, you may find that
> > > fullcontact sometimes contains private network addresses. This makes
> > > it impossible to route inbound calls directly to the client.
> > >
> > I recently started pulling the ipaddress and port from the database
> > instead of using the fullcontact field.  Aaron Daniels helped me to
> > get the realtime query working instead of using the mysql connect
> > statements.
> >
> > [lookupmysql]
> > include => invalid
> >
> > exten => _X.,1,RealTime(sippeers|name|${EXTEN}|DN_)
> > exten => _X.,2,GotoIf($["${DN_ipaddr}" = ""]?${EXTEN},105:${EXTEN},3)
> > exten => _X.,3,Set(directdial=${EXTEN}@${DN_ipaddr}:${DN_port})
> > exten => _X.,4,Dial(SIP/${directdial},15,rj)
> > exten => _X.,5,Macro(sendtovm,${EXTEN})
> > exten => _X.,6,Hangup
> >
> > exten => _X.,105,Macro(sendtovm,${EXTEN})
> > exten => _X.,106,Hangup
> >
> > The RealTime command pulls all the entire record from the database and
> > prepends all the fields with the last argument (here is have DN_)  so
> > when the record is pulled, all the records info is available as a
> > variable like DN_port and DN_ipaddr.
> >
> > This is a really cool command.  Hope this helps.
>
> Wow, thanks for the examples JR. This is exactly what I needed. I was
> not aware of the RealTime command. That will be very useful.
>
> David
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