Nortel phones and cisco Switch

[Network Pro]

Hi

can someone please explain how the config would look like for daisy chaining a Nortel phone and pc on a cisco switch

!

ip dhcp pool Nortel-Voice-105

   network 172.16.105.0 255.255.255.0

   default-router 172.16.105.1

   option 128 ascii "Nortel-i2004-A,213.48.250.246:5000,1,0;213.48.250.246:5000,

1,0."

   option 191 ascii "VLAN-A:105."

!

interface FastEthernet0/21

switchport access vlan 79

switchport mode access

switchport voice vlan 105

speed 100

duplex full

spanning-tree portfast

spanning-tree bpduguard enable

spanning-tree guard root

end

When the command switcport access vlan 79 , the phone stops working. the phone only works when the command switcport voice vlan 105 ALONE exists. ( i mean no switchport access vlan 79)

but we want the pcs daisy chained with the phones - so is there a way to seperate voice and data...

Thanks

[Network Pro]

dont need any qos config at this minute...jsut want to get this working to start with

[Jonathan Schulenberg]

Well switchport voice vlan X relies on CDP to work. I am guessing the Nortel phones support LLDP if anything. You would need a different configuration: http://www.cisco.com/en/US/docs/switches/lan/catalyst3560/software/release/12.2_58_se/configuration/guide/swlldp.html

Switch# configure terminal
Switch(config)# network-policy 1
Switch(config-network-policy)# voice vlan 100 cos 4
Switch(config-network-policy)# exit
Switch(config)# interface gigabitethernet0/1 
Switch(config-if)# network-policy profile 1
Switch(config-if)# lldp med-tlv-select network-policy

Also be aware that Catalyst 3000 series switches will not respond to LLDP TLVs and CDP packets; only one or the other. This means you probably need to do a 'no cdp run' and reload the device after configuring LLDP.

[Brandon Svec]

Something like this should work for any IP phone not using CDP or LLDP:

interface GigabitEthernet0/45

description VOIP/PC Port

switchport trunk encapsulation dot1q

switchport trunk native vlan 79

switchport trunk allowed vlan 79,105

switchport mode trunk

You would need to get the VLAN 105 info to the phone via native VLAN dhcp or manually for this to work.

You may be able to have the native VLAN give tftp server info to the phone where it can get a config file that has proper VLAN info.  Then the phone should reboot after it get's the config file, but it will boot into the voice vlan and then get voice dhcp address and start working.

Brandon

[Network Pro]

Thanks for your replies

just wondering something like this, will it work ?

switchport trunk encapsulation dot1q

switchport trunk native vlan 79

switchport mode trunk

switchport voice vlan 103

switchport priority extend cos 0

spanning-tree portfast

also i could enable lldp on the access switch (2960) but on 3750 looks like it i cant enable it ?

Thanks

[Network Pro]

got the above to work

switchport trunk encapsulation dot1q

switchport trunk native vlan 79

switchport mode trunk

switchport voice vlan 105

spanning-tree portfast

does anyone know how to apply QOS as i have only basic knowledge about VoIP. does anyone have the config and does it need applying on layer 2 and layer 3 switches?

Thanks

[Network Pro]

i have applied this config to nortel ip phones

int fa0/5

switchport mode trunk

switchport  trunk native vla 5

switchport trunk encap dot1q

switchport voice vlan105

the ip phones seems to get an ip address in 105 range

but it doesnt seem to get ann ip address on

switcport mode trunk

switch trunk native vla1

switch trunk encap dot1q

switchport voice vlan105

Thanks