UC520 No Audio Calling Extension To Extension

[artieman209]

I can make calls out over FXO from any phone. I can Recieve calls in from FXO on any phone. I can call any phone over vpn from my house from cipc and audio goes both ways. If we call from one phone to another internally we get no audio either way.

This is how the network is setup

Phones site 1 --- UC520 --- Linksys rv042 --- VPN --- Linksys rv042 --- Phones site 2

I have attached the uc520 config

you can also locate the config here www.attechs.net/misc/uc520jeff.txt

Any help would be greatly appreciated.

[David Trad]

Hi Arthur,

Was this system configured with CCA?

Just a couple of questions, I noticed the following in the config:

ip dhcp pool phone
   network 10.1.1.0 255.255.255.0
   option 150 ip 10.1.1.1
   dns-server 10.1.1.250
   default-router 10.1.1.1

I have only ever seen them like this, so I only ask about CCA as I am trying to work out if this is something new that it does.

ip dhcp pool phone
   network 10.1.1.0 255.255.255.0
   default-router 10.1.1.1
   option 150 ip 10.1.1.1

Did you also configure this manually?

ip name-server 10.1.1.250

I also noticed this:

interface Loopback0
 ip address 10.1.10.2 255.255.255.252

Again I am used to seeing it like this:

interface Loopback0
 description $FW_INSIDE$
 ip address 10.1.10.2 255.255.255.252
 ip access-group 101 in
 ip nat inside
 ip virtual-reassembly

Then this one:

interface Integrated-Service-Engine0/0
 description cue is initialized with default IMAP group
 ip unnumbered Loopback0
 ip virtual-reassembly
 service-module ip address 10.1.10.1 255.255.255.252
 service-module ip default-gateway 10.1.10.2

Again used to seeing it like this:

interface Integrated-Service-Engine0/0
 description cue is initialized with default IMAP group
 ip unnumbered Loopback0
 ip nat inside
 ip virtual-reassembly
 service-module ip address 10.1.10.1 255.255.255.252
 service-module ip default-gateway 10.1.10.2

NOTE: The above may not be CCA compliant, although it was configured using an early version of CCA (2.1 I think)

This one strikes me as being odd:

interface FastEthernet0/1/0
 switchport access vlan 100
 switchport voice vlan 100
 macro description cisco-phone
 spanning-tree portfast

Again only ever seen it like this:

interface FastEthernet0/1/0
 switchport voice vlan 100
 macro description cisco-phone
 spanning-tree portfast

Looking at this section seems odd as well:

interface Vlan1
 no ip address
 ip helper-address 10.1.1.250
 bridge-group 1
 !
!
interface Vlan100
 no ip address
 ip helper-address 10.1.1.250
 bridge-group 100
 !
!
interface BVI1
 ip address 192.168.10.1 255.255.255.0
 ip virtual-reassembly
 !
!
interface BVI100
 ip address 10.1.1.1 255.255.255.0
 ip virtual-reassembly

This is a comparable configuration:

interface Vlan1
 no ip address
 bridge-group 1
 bridge-group 1 spanning-disabled
!
interface Vlan100
 no ip address
 bridge-group 100
 bridge-group 100 spanning-disabled
!
interface BVI1
 description $FW_INSIDE$
 ip address 192.168.10.1 255.255.255.0
 ip access-group 102 in
 ip nat inside
 ip virtual-reassembly
!
interface BVI100
 description $FW_INSIDE$
 ip address 10.1.1.1 255.255.255.0
 ip access-group 103 in
 ip nat inside
 ip virtual-reassembly
!

I wonder, are you attempting to run a Flat-Network, I am not sure why you would need the helper are you having issues with DHCP being issued??

Your config is missing this:

ip nat inside source list 1 interface FastEthernet0/0 overload

Your dial-peers have some funky things happening there, I have never seen something like it I am guessing at this point that this was a CLI configuration and not CCA

This is a first glance look, there are some other things that caught my eye but we would be embarking on an entire re-write if I keep digging further, my guess is that when dialing internally the calls go way ward due to certain things being misconfigured, if you can blow this config away and rebuild it using CCA, it will be much quicker and easier than going through and repairing it, even with SMB or TAC support it would still be quicker to rebuild it.

Certain things do not look right to me, I could provide you with a workable configuration but this is not an ideal thing to do, I would still push going down the CCA path, even if it is just to build it for you and then you can revert back to CLI if that is your conform zone.

Just a thought and sorry I couldnt spend more time on it and nail the exact cause of the problem.

Cheers,

David.

[artieman209]

There is a reason why I have configured it like it is. What im looking for is someone to give me an idea why I dont have audio from extension to extension internal dial only.