SCN fallback & DHCP server - IP phone won't try on the 2nd IPO

[mmy1981]

Hi,

I set up a SCN test environmnent configured like this:
IP500 = system1 (soft 6.0(14))
IP = 192.168.42.1
IP Line pointing to 192.168.42.2 (= system2)
IP line supplementary services = IP office SCN
IP route pointing to 192.168.42.2
auto create users + extn's enabled

IPO406 = system2 (soft 5.0(22))
IP = 192.168.42.2
IP line pointing to 192.168.42.1 (= system1)
IP line supplementary services = IP office SCN fallback
IP route pointing to 192.168.42.1
auto create users + extn's disabled

Laptop running manager, correct bin files, http server, ... = 192.168.42.3

Windows server 2008 = DHCP server
IP = 192.168.42.6
DHCP scope is set
scope option 242 MCIPADD=192.168.42.1,192.168.42.2,MCPORT=1719,HTTPSRVR=192.168.6.3,VLANTEST=0

The SCN is running correctly (I connected a digital phone to both sites - both phones can call to each other). An IP phone can be registered to both sites. SA shows the SCN is up and running.

What happens if the IP phone boots:
- a request to the DHCP server is made.
- DHCP server tells the phone to connect to system1 (MCIPADD=192.168.42.1)
- IP phone is registerd

when system1 fails (power failure or the IP line from the PBX to the switch is disconnected):
- the IP phone contacts the DHCP server again
- DHCP server tells the phone to connect to system1 (which is down)
- phone won't try to register on system 2

As I understand from the IP phone manual, the phone should try to register on system2 after +- 3 minutes. (but it keeps trying on system1)

I tried the same with a 5610 phone (using scope option 176) - same results though...

Hope anybody can help me with this. I think something must be wrong with the config on the DHCP server (since it won't even try to register on system2).

 

[kwing112000]

do you have your trunks set as SCN fallback?

Kevin Wing
ACSS Small and Medium Enterprise (SME) Communications
ACS- Implement IP Office
ACA- Implement IP Office
Carousel Industries

 

[mmy1981]

trunks as under "line", where all the ISDN lines, H323 lines, ... are configured?

Then yes -> only for system 2 -> H323 line - tab VoIP settings - IP Office SCN fallback (with the SCN backup options checked to backup the IP phones, Hunt Groups, ...)

 

[tlpeter]

Try it with the ipo as dhcp server.

BAZINGA!

I'm not insane, my mother had me tested!

 

[Bas1234]

You need to turn off the IPO the is set to SCN not the one that is set to SCN fall back.

___________________________________________
It works! Now if only I could remember what I did...

Dain Bramaged (Avaya Search tool

http://tinyurl.com/bas1234

)
______________________________________

 

[mmy1981]

ok, stupid me... SCN and SCN fallback where switched.

I reconfigured it (system1: H323 line = SCN fallback / system2: H323 line = SCN). Works great.

thanks!