Re: [Megaco] MGC and virtual MG

[Ron Ho <ron.ho.megaco at gmail.com>]

I assume that multiple Virtual MGs within the same physical MG can have only one ipaddress+port configured. As long as the mid of the virtual MG is different for each virtual MG (e.g. using device name format), the same IP connection can be used to carry multiple control associations between the MGC and the multiple virtual MGs. Right?

If that is the case, who control the setup/tear down of the IP connection? How MGC handover/failover and MG handover/failover are controlled? Should there be one virtual MG designated as the master MG? Similarly, who should receive the keep alive message (e.g. auditvalue if it is configured)? Does the keep alive message need to be sent to all VMG or only the master MG should receive it?

I am still confused.

Thanks,
Ron

On Tue, Sep 22, 2009 at 3:15 AM, Schwarz Albrecht <Albrecht.Schwarz at alcatel-lucent.de> wrote:

You may found a lot of complementary information with respect to the H.248 Control Association in:

H.Sup7 : Gateway control protocol: Establishment procedures for the H.248 MGC-MG control association
http://www.itu.int/rec/dologin_pub.asp?lang=e&id=T-REC-H.Sup7-200805-I!!PDF-E&type=items

see e.g. § 5.2 Constitution of a control association

> -----Original Message-----
> From: megaco-bounces at ietf.org
> [mailto:megaco-bounces at ietf.org] On Behalf Of Tom Taylor
> Sent: Dienstag, 22. September 2009 04:04
> To: Ron Ho
> Cc: megaco
> Subject: Re: [Megaco] MGC and virtual MG
>
> The MGC only needs one mid.
>
> Ron Ho wrote:
> > Thanks for the clarification. So one MGC can control multiple MGs.
> > Does the MGC need multiple mid, one for each MG? Or the MGC
> needs one
> > only mid and every MGs send to the same MGC using the same
> mid of the MGC?
> >
> > On Fri, Sep 18, 2009 at 4:13 PM, Tom Taylor
> <tom.taylor at rogers.com> wrote:
> >
> >> You should be able to control multiple virtual MG from one MGC
> >> instance if you need to. I can see a simple use case for
> this, where
> >> the normal MGC for one of the virtual MGs has failed and an MGC
> >> controlling another virtual MG takes its place. I am sure
> there are other applications.
> >>
> >> And yes, you can multiplex control associations for
> multiple virtual
> >> MGs over the same physical connection. You would have to take some
> >> care not to clear down the connection just because one
> virtual MG is doing a restart.
> >>
> ...

> _______________________________________________
> Megaco mailing list
> Megaco at ietf.org
> https://www.ietf.org/mailman/listinfo/megaco
>