New to Cisco - Avaya Phones

[MLuedke]

We are moving to Cisco C9200 Access switches with a Core C9300. Our environment has Avaya IP Office with physical phones on our desks. With our existing Avaya switch, the port the phone connects to is configured with two VLANs. We have VLAN 20 for PC connections and VLAN 50 for the Phone itself. The Avaya Phone on the desk has a network connection that gives the phone a VLAN 50 IP address. Then, going out of the phone is another network connection connecting to the PC, which gets a VLAN 20 IP address.

The port on the Avaya Switch is configured this way.

Port 1/3
VLANs 20,50
Default VLAN 20
Tagging untagPvidOnly

What is the best way to configure the interface on my Cisco Switch? Avaya told me the phones would work with any switch (it doesn't have to be Avaya).

Thanks for the help!

[Reza Sharifi]

Avaya told me the phones would work with any switch (it doesn't have to be Avaya).

That is correct. Avaya works just fine with Cisco switches. Config example:

Interface g1/0/x

Switchport mode access

Switchport access vlan 20 (data vlan)

switchport voice vlan 50 (voice vlan)

switchport mode trunk

switchport trunk allowed vlan 20, 50

HTH

[Deepak Kumar]

---

@Reza Sharifi wrote:

Avaya told me the phones would work with any switch (it doesn't have to be Avaya).

That is correct. Avaya works just fine with Cisco switches. Config example:

Interface g1/0/x

Switchport mode access

Switchport access vlan 20 (data vlan)

switchport voice vlan 50 (voice vlan)

switchport mode trunk

switchport trunk allowed vlan 20, 50

HTH

---

Interface g1/0/x

Switchport mode access

Switchport access vlan 20 (data vlan)

switchport voice vlan 50 (voice vlan)

switchport mode trunk

switchport trunk allowed vlan 20, 50

---

@Reza Sharifi wrote:

Avaya told me the phones would work with any switch (it doesn't have to be Avaya).

That is correct. Avaya works just fine with Cisco switches. Config example:

Interface g1/0/x

Switchport mode access

Switchport access vlan 20 (data vlan)

switchport voice vlan 50 (voice vlan)

switchport mode trunk

switchport trunk allowed vlan 20, 50

HTH

---

@Reza Sharifi seems typo in the configuration. Your comment suggesting access and trunk on the same port?

[Giuseppe Larosa]

Hello @MLuedke ,

most of the times for Cisco switches to support other vendor IP phones involves to enable LLDP   ( IEEE standard equivalent of CDP).

the use of a voice VLAN + a data VLAN for downstream PC is called by someone "mini trunk" and it may work also without setting the port in mode trunk.

I mean the following config can work:

Interface g1/0/x

Switchport mode access

Switchport access vlan 20 (data vlan)

switchport voice vlan 50 (voice vlan

if you want use an explicit trunk you need to set the data VLAN as the native VLAN on the trunk.

Interface g1/0/x

Switchport mode access

Switchport access vlan 20 (data vlan)

switchport voice vlan 50 (voice vlan)

switchport mode trunk

switchport trunk native vlan 20

switchport trunk allowed vlan 20,50

Hope to help

Giuseppe

[Deepak Kumar]

Hello, 

If you are using AVAYA phones, don't forget to enable LLDP on Cisco Switches globally. 

configuration would be like

lldp run 

inter gig1/0/1

description "connect-to-client-phone"

switchport mode access

switchport access vlan 20 (data vlan)

switchport voice vlan 50 (voice vlan)

spanning-tree portfast