Cisco 3550 Switch Voice Not working

[Drakkoneth]

Hi Everyone,

I am currently getting a new phone system installed and everything is setup to use vlan 120 for voice.  I have made the changes is all of my switches, however, all my 3550 switches do not seem to be letting the data go through or communicate.  It works fine on my 3560s.  We are switching from a cisco unified system to a cloud based through out Internet provider which is using Polycom 311s

This is an example of one of the port settings

interface FastEthernet0/4
switchport access vlan 10
switchport mode access
switchport voice vlan 120
mls qos trust device cisco-phone
mls qos trust cos
auto qos voip cisco-phone
wrr-queue bandwidth 20 1 80 1
wrr-queue min-reserve 1 5
wrr-queue min-reserve 2 6
wrr-queue min-reserve 3 7
wrr-queue min-reserve 4 8
wrr-queue cos-map 1 0 1 2 4
wrr-queue cos-map 3 3 6 7
wrr-queue cos-map 4 5
priority-queue out
spanning-tree portfast

Any assistance would be appreciated

Thanks

[Reza Sharifi]

Hi,

For testing, can you remove all the qos configs and try again. Something like this:

interface FastEthernet0/4
switchport access vlan 10
switchport mode access
switchport voice vlan 120
spanning-tree portfast

HTH

[Drakkoneth]

Thank You for your reply.

I removed all the qos and still having an issue.  It is now showing:

interface FastEthernet0/16
 switchport access vlan 10
 switchport mode access
 switchport voice vlan 120
 spanning-tree portfast

I feel like I am missing something simple but cannot seem to find out what it is.  

I can see the vlan exists and that all the ports are assigned to it, I have set the 2 trunk ports to allow the vlan 120. 

120  phones                           active    Fa0/1, Fa0/2, Fa0/3, Fa0/4, Fa0/5, Fa0/6, Fa0/7, Fa0/8, Fa0/9, Fa0/10, Fa0/11, Fa0/12, Fa0/13, Fa0/14, Fa0/15, Fa0/16, Fa0/17, Fa0/18, Fa0/19, Fa0/20, Fa0/21, Fa0/22, Fa0/23, Fa0/24

[Reza Sharifi]

What about the data vlan (vlan 10)? What is the output of sh vlan?

HTH

[Drakkoneth]

I am not quite sure what you mean with that question I'm Sorry.  vlan 10 is my main data network.  

Maybe this is what you mean?

10   VLAN0010                         active    Fa0/1, Fa0/2, Fa0/3, Fa0/4, Fa0/5, Fa0/6, Fa0/7, Fa0/8, Fa0/9, Fa0/10, Fa0/11, Fa0/12, Fa0/13, Fa0/14, Fa0/15, Fa0/16, Fa0/17, Fa0/18, Fa0/19, Fa0/20, Fa0/21, Fa0/22, Fa0/23, Fa0/24

[Reza Sharifi]

You got it. This is exactly what I was looking for. So, when you connect the phones, do they come up? Do they get an IP?

Can you explain the issue?

HTH

[Drakkoneth]

They power on, but come up just showing the phones model number.  They are not getting an IP address so that they can provision properly. 

[Reza Sharifi]

These are not Cisco phones right? if yes, is LLDP enabled on the switch?

[Reza Sharifi]

https://community.cisco.com/t5/ip-telephony-and-phones/non-cisco-voip-phones/td-p/2800328

[Drakkoneth]

You are correct, they are not cisco Phones.  I am unable to run lldp though.  It is a Cat3550 switch.  My searching says that it does not have that ability.  Do you know different? I did try running the command but it Is not recognized.

Thank You

[Joseph W. Doherty]

The 3550 won't support LLDP.

[Drakkoneth]

So do you know if there is a way to make Polycom Phones work on these switches?  

[Joseph W. Doherty]

Cannot say for sure concerning Polycom VoIP phones, but I have seen VoIP phones where either you can hardcode a VLAN tag they should use or DHCP can send them a specific DHCP option that informs the phone what VLAN tag to use (the latter start up on the native VLAN, and then when then obtain the DHCP option they switch over to using it.)

[Drakkoneth]

Polycoms do have a spot to tag the VLAN in the network settings and I did set that.  The CDP is enabled tried with the LLDP enabled and disabled and still did not make a difference. I even tried setting the access vlan as 120 to see if that would work but it did not.    

[Joseph W. Doherty]

Well, if the VoIP phone is using tagged frames, it would make sense it wouldn't work with port's access VLAN set to 120.

BTW, have you tried a) using the VoIP phone alone (untagged) on a port and/or b) defining the port as a trunk?