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Phone Service using FQDN

Hi guys

I would like to know if it is possible to set a Phone Service (specifically Extension mobility) using a FQDN in the Service URL

Currently I'm using 

http://10.10.14.10:8080/emapp/EMAppServlet?device=#DEVICENAME#

But I want to start using something similar to:

http://extmobility.office.com:8080/emapp/EMAppServlet?device=#DEVICENAME#

but is not working the ping works from my PC and from the server, in the examples you can se that is load balancing correctly.

C:\>ping extmobility.office.com

Pinging extmobility.office.com [10.10.15.10] with 32 bytes of data:

Reply from 10.10.15.10: bytes=32 time=92ms TTL=59

Reply from 10.10.15.10: bytes=32 time=92ms TTL=59

Reply from 10.10.15.10: bytes=32 time=92ms TTL=59

Reply from 10.10.15.10: bytes=32 time=92ms TTL=59

admin:utils network ping extmobility.office.com

PING extmobility.uskc.office.eeft.com (10.10.14.10) 56(84) bytes of data.

64 bytes from kceft-cucm01p.office.com (10.10.14.10): icmp_seq=1 ttl=64 time=0.023 ms

64 bytes from kceft-cucm01p.office.com (10.10.14.10): icmp_seq=2 ttl=64 time=0.058 ms

64 bytes from kceft-cucm01p.office.com (10.10.14.10): icmp_seq=3 ttl=64 time=0.038 ms

64 bytes from kceft-cucm01p.office.com (10.10.14.10): icmp_seq=4 ttl=64 time=0.041 ms

I even tried using http://www. but nothing works, any idea of the correct setup for this?

I checked

http://www.cisco.com/en/US/products/sw/voicesw/ps556/products_tech_note09186a0080a80386.shtml#t1

http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/admin/7_0_1/ccmfeat/fsem.pdf (Page 17)

http://www.cisco.com/en/US/products/sw/voicesw/ps556/products_tech_note09186a0080b1f6b5.shtml#backinfo

All the links said that is possible, but none of them gave an example of the correct configuration.

Thank you!!!

Everyone's tags (4)
1 ACCEPTED SOLUTION

Accepted Solutions

Phone Service using FQDN

Although Cisco recommend not using round robin it can be the best option available if the customer does not have a load balancer available. The only other alternative is configuring a backup EM service, subscribing the phones to both and hoping that the users will remember to use it. I do sometimes use round robin and explain to the customer it is a bodge.

Anyway your URL looks fine. I would try SSH'ing into a phone and trying to ping the hostname. Instructions on how to do this are available at the link below:

http://iptbuzz.blogspot.co.uk/2011/09/how-to-ssh-into-cisco-ip-phone.html

If you cannot ping it by hostname then check your DNS setup.

6 REPLIES
VIP Super Bronze

Phone Service using FQDN

Does the phone have a DNS server in it's DHCP lease?

Did you define a Secure URL on the EM service? If yes, remove it for a moment as that would subject it to the ITL and lead us down a different troubleshooting path.

PS- Are you using a real load balancer or DNS round robin? The SRND explicitly recommends against the later.

Please remember to rate helpful responses and identify helpful or correct answers.

Please remember to rate helpful responses and identify helpful or

Phone Service using FQDN

Does the phone have a DNS server in it's DHCP lease?

Yes, they do, in fact are the same for my PC.

Did  you define a Secure URL on the EM service? If yes, remove it for a  moment as that would subject it to the ITL and lead us down a different  troubleshooting path.

No, is unsecured.

PS- Are you using a real load balancer or DNS round robin? The SRND explicitly recommends against the later.

I'm not quite sure... let me back with you tommorrow for this.

Phone Service using FQDN

Hi Jonathan,

I double check and yeah... we are using DNS round robin.

Phone Service using FQDN

Although Cisco recommend not using round robin it can be the best option available if the customer does not have a load balancer available. The only other alternative is configuring a backup EM service, subscribing the phones to both and hoping that the users will remember to use it. I do sometimes use round robin and explain to the customer it is a bodge.

Anyway your URL looks fine. I would try SSH'ing into a phone and trying to ping the hostname. Instructions on how to do this are available at the link below:

http://iptbuzz.blogspot.co.uk/2011/09/how-to-ssh-into-cisco-ip-phone.html

If you cannot ping it by hostname then check your DNS setup.

Phone Service using FQDN

Sorry for the BIG BIG delay with this guys!

I tried what James suggested... I can start the ssh sesion but I cannot access to the phone, I tried with:

default-cisco

default-cisco123

default-admin

default-123cisco

I know "default" is the correct username, but I don't know the password

Phone Service using FQDN

Hi guys, just an FYI

at the end I decided to create two instance of Ext mobility, because everywhere I looked said that is not recommended to uses DNS server.

Thanks for all the help!!!

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