[asterisk-users] iax2 bindaddress: how to reload so iax2 can bind to an alias IP

[Josiah Bryan]

Vieri wrote:
> --- On Fri, 1/9/09, Tilghman Lesher <tilghman at mail.jeffandtilghman.com> wrote:
>>> --- On Fri, 1/9/09, Josiah Bryan
>> <jbryan at productiveconcepts.com> wrote:
>>>> Is this right after bringing online the alias IP?
>>>> If so, you might try using arp-sk to broadcast an
>> ARP
>>>> packet to kick-start the IP lookup...
>>>> http://sid.rstack.org/arp-sk/
>>> Thanks for the link.
>>> However, it's not that the two boxes don't
>> "see" each other: they can ping,
>>> do HTTP, etc. The only service not working is IAX (ie.
>> "iax2 show peers"
>>> says that the peer is unreachable). So basically, if I
>> try to communicate
>>> with the alias IP address via several protocols such
>> as HTTP, ICMP, SSH,
>>> etc, then all works fine. However, if I setup a iax
>> trunk, it does not
>>> work.
>>> I also tested the connection with a softphone (zoiper)
>> and it fails too (it
>>> fails to connect to the alias IP but it connects fine
>> to the nic's
>>> "standard" IP address).
>>>
>>> So, I'm puzzled by the following:
>>>
>>> These WORK:
>>> telnet <alias_IP> 80
>>> ssh <alias_IP>
>>> ping <alias_IP>
>>> iaxclient <standard_IP>
>>>
>>> But this doesn't:
>>> iaxclient <alias_IP>
>>>
>>> even though iax.conf has bindaddr=0.0.0.0
>>>
>>> Any clue as to why it's behaving this way?
>> Yes.  All protocols prior to 1.6.0 use the routing table to
>> determine what
>> address to use when sending out packets related to a call. 
>> Normally, the
>> alias address is not in the routing table at all, which is
>> why it is not
>> 'seen' by IAX2.  Now, starting in 1.6.0, we have
>> the capability within
>> Asterisk to use alias addresses within certain protocols,
>> but AFAIK, that
>> has only been implemented within the SIP stack.
> 
> Thanks for your helpful feedback.
> 
> Curiously, UDP SIP works with alias IP addresses even in 1.2.30.
> I guess that the IAX implementation is lagging behind in this particular field.
> 


With re: to the routing table - it may be a silly question, but is that 
an arp routing table? If so, could you use arp-sk to force populate the 
routing table for the alias?

-josiah