CM Failback not working.... 1

[encarter]

We are opening a very small new office and our MPLS connection will not be turned up soon enough.

The thought was the put a 2811, 4 pots lines in the 2811, a switch and 4 phones at this site and have the phones go into CM Failback mode.

But the phones don't go in to CM Failback mode.
The phone does grab a DHCP address from the 2811 though.

We have many other sites that CM-Failback works and im using the same config for this router.

What could be causing my issue?
This router has never been connected to our network before.


CM-Failback config


call-manager-fallback
max-conferences 8 gain -6
transfer-system full-consult
ip source-address 172.17.14.1 port 2000
max-ephones 30
max-dn 144 dual-line
voicemail 817347436000
no huntstop
time-zone 5

 

[whykap]

The phones and the router have to be registered to the call manager before they go to fallback (SRST) mode.
So you will have to configure the site as a CME until your MPLS circuit get there.

 

[encarter]

stars for you my friend.
Your like a machine on this site.

I was actually thinking along the same lines (about the reigsteration part). I was thinking that the router needs to be registered at least once.

For CME though you need to purchase it correct, im sure its just not available something what im trying achieve.

The equipment is at corporate so i was thinking about registering the router, get the 4 phones working and then ship the equipment down.

Would that work?

 

[whykap]

No it won't. If it's powered down then it will need to reregister with ccm before it falls into SRST.

SRST and CME is the same license these days. So as long as you have the right IOS you can enable telephony services on the router and configure it as a CME.
Once you get your MPLS up and running get rid of the CME config and put the SRST back on.

It should't take that long to get 4 phones with basic service configured with CME.

 

[pndscm]

Actually registering the phones/router at Corp then shipping it out WILL work. During SRST the router learns the phones config from the phones themselves. I have done this before where I was moving a Branch office across town and the new offices T-1 to Corp was not there yet. The phones came up and registered to the SRST router, local lines worked fine (FXO ports) and when the T-1 was installed, everything registered to the CCM at the Corp office just fine.

 

[encarter]

wow both posts very interesting.

For Whykap: im using this IOS image:
c2800nm-ipvoicek9-mz.124-15.T6.bin



Murray-2811-New#show telephony-service all
telephony-service is not enabled




Murray-2811-New#sh call-manager-fallback
CONFIG (Version=4.1(0))
=====================
Version 4.1(0)
For on-line documentation please see:

http://www.cisco.com/univercd/cc/td/doc/product/access/ip_ph/ip_ks/index.htm

ip source-address 172.17.17.1 port 2000
max-ephones 42
max-dn 144 dual-line
max-conferences 8 gain -6
dspfarm units 0
dspfarm transcode sessions 0
no huntstop
no huntstop channel
voicemail 817347436000
cnf-file location: system:
cnf-file option: PER-PHONE-TYPE
network-locale[0] US (This is the default network locale for this box)
network-locale[1] US
network-locale[2] US
network-locale[3] US
network-locale[4] US
user-locale[0] US (This is the default user locale for this box)
user-locale[1] US
user-locale[2] US
user-locale[3] US
user-locale[4] US
srst mode auto-provision is OFF
srst ephone template is 0
srst dn template is 0
srst dn line mode is single
time-format 12
date-format mm-dd-yy
timezone 6 Mountain Standard/Daylight Time
no transfer-pattern is configured, transfer is restricted to local SCCP phones only.
keepalive 30 auxiliary 30
timeout interdigit 10
timeout busy 10
timeout ringing 180
timeout ringin-callerid 8
timeout night-service-bell 12
caller-id name-only: enable
Limit number of DNs per phone:
7910: 36
7935: 36
7936: 36
7940: 36
7960: 36
7970: 36
Log (table parameters):
max-size: 150
retain-timer: 15
transfer-system full-consult
local directory service: enabled.
Extension-assigner tag-type ephone-tag.



I think im going to test both out.


I didnt know that CME comes bundled with SRST.

Is this a good article for configuring CME?

http://www.cisco.com/en/US/products...s_configuration_example09186a008037f2a9.shtml

 

[encarter]

Update:

I managed from home to configure CME and get one phone registerd, all looks good. I'll test more when im back at the office.

I will also test the CM-Failback mode after reigstering the router and post my results monday.

 

[whykap]

I did not know that you could power a router down while in SRST mode and when it reboots it will keep the phones in SRST. My understanding was that if you lose power while in SRST you are sol.
If pndscm says it works that way then it does. Sorry for misinforming you.
Depending on how long it will take to get your MPLS circuit from the time you install the phones you might still want to consider CME. If it is for a few days OK, but if it will be a month maybe CME is the way to go.
Then again for 4 phones it might be sufficient.

Let us know what you decided to do and how it worked out for ya.

 

[encarter]

I ended up going with the CME route. The equipment shipped today for turn-up tomorrow.

I tried to test the SRST, but i couldn't figure out how to get the gateway registered. That might sound stupid but it was harder than it looked.

callmanager----{vlan100 172.17.100.x}----[core switch]----{vlan60 172.17.17.x}-----[2811 Router]----172.17.16.x---[switch]

I couldnt figure out how to get routing working, specifically how to get the remote network 172.17.16, pingable from the core switch.

Call Manager/voice net 172.17.100.x
Vlan60 172.17.17.x
Remote Networj 172.17.16.x

On the core switch-port i tried trunking, setting it to switchport vlan 60m, and i gave up because of time contraints.


Ahh well.

Will Post turnup results tomorrow.