[Freeswitch-users] Live Upgrade Techniques

[Saeed Ahmad]

I've experience with a commercial SBC, these are two machines running in
cluster mode. In that case if one SBC is going down then other will take all
new calls including the call which were active on broken SBC (SIP only).

Thats quite ideal for wholesale traffic where the SBC will never be idle.

On Fri, Jun 12, 2009 at 8:25 AM, John Dalgliesh <johnd at defyne.org> wrote:

> On Thu, 11 Jun 2009 at 22:57 -0500, Brian West wrote:
> > On Jun 11, 2009, at 10:35 PM, John Dalgliesh wrote:
> >> On Thu, 11 Jun 2009 at 16:33 -0400, Michael Giagnocavo wrote:
> >>>
> >>> Well, if you're running multiple machines, waiting for it to drainstop
> >>> isn't that big of a deal unless you're in some sort of hurry, right?
> >>> Give it an hour or so to drainstop, then kill 'em.
> >>
> >> Yes that's exactly what I'm trying to do. The problem is some people
> will
> >> only try one IP address.
> >
> > Clients that don't properly implement SRV/NAPTR and fail over need to be
> > smacked.  :)  (not customers but software that fails to do that)
>
> Yes I'm sure much of their software can do this but it has been set up for
> static numeric IPs. And getting the IP changed is a week-long process for
> some customers!
>
> >>> Would it not be simpler to try to do something with re-invites or
> REFER,
> >>> assuming your endpoints support it?
> >>
> >> That was actually plan A. I already added a property in sip_profile
> called
> >> failover_redirect, which specifies another server to try if FS can't
> >> allocate any more sessions (e.g. too busy, paused, shutdown asap, etc.),
> >> by sending back a SIP 302 Moved Temporarily response, instead of 503 Max
> >> Calls In Progress.
> >
> > You can't send a 302 to a call thats already established.
>
> Yes and I don't want to touch established calls - those calls can stay
> there until they drop. This is sent to new requests when
> switch_core_session_request fails in mod_sofia.
>
> >> Turns out not all my endpoints support it :(
> >
> > AKA broken endpoints.  :)
>
> Some are broken. Some just have this feature disabled. For 'security
> reasons'. You know the drill.
>
>
> {P^/
> John
>
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