Re: VLAN data + voice on Catalyst 2950 (+AP1231)

Robert_Berger · ‎09-08-2004

Hallo,

can help me someone by config a C2950 to config VLAN

on the AIR-AP1231g following vlan are defined:

VLAN 1 data

VLAN 2 voice

data and voice (7920) on ap1231 are working

Now i need to config the port on the switch with no idea. Data is running but voice don't.

Also maybe on the 1760V (running CME 3.1) if ther also changes nesseary.

Thanks

pflunkert · ‎09-08-2004

Hi Robert,

when you configure on the access-point more than one vlan you must these vlans also configure on the switch:

conf t

vlan 1 !! vlan exists by default

name Datavlan

exit

vlan 2

name voicevlan

end

Then must configure the connection to the AP. You want carry two vlans, the configure a trunk:

conf t

int fast 0/1 !!! for example

switchport mode trunk

end

You define another trunk mode also. It depends from the configuration on the AP. But what i wrote should works.

The connection to the callmanager and to your servers should exist.

Here is the link for the vlan configuration guide:

http://www.cisco.com/en/US/products/hw/switches/ps628/products_configuration_guide_chapter09186a0080212c3e.html#wp1200245

Regards

Peter

aashish.c · ‎09-08-2004

Hi,

after creating vlans for voiceon data, on a switchport you need to configure membership of voice vlan and trunk :

sw#conf t

sw(config)#int fa0/x

sw(config-if)#switchport voice vlan 2

sw(config-if)#switchport mode trunk

sw(config-if)#switchport trunk native vlan 1

sw(config-if)#end

sw#wr mem

vlan 2 will carry voice and vlan 1 will be the native (untagged) vlan to carry the data.

here is the link for configuring voice vlans on switch :

http://www.cisco.com/univercd/cc/td/doc/product/lan/cat2950/12119ea1/2950scg/swvoip.htm

regards

aashish C

pflunkert · ‎09-09-2004

Hi aashish,

i don't agree with your opinion that the voice vlan 2 on the trunk is necessary. It's only necessary when the trunk will go to a voice phone. In this case you have a normal trunk to another device (the ap). And the ap sent the voice packets through vlan 2.

The statement switchport trunk native vlan 1 is default, so i don't wrote it.

Regards

Peter

Robert_Berger · ‎09-09-2004

Thanks but i have still problems.

Data working well.

Have i also to config the Switch port to the Router 1760V ? (Router is default gateway also for data)

Need the VLAN config on the 1760V ?

Here my configs:

switch(vlan)#sh

VLAN ISL Id: 1

Name: default

Media Type: Ethernet

VLAN 802.10 Id: 100001

State: Operational

MTU: 1500

Backup CRF Mode: Disabled

Remote SPAN VLAN: No

VLAN ISL Id: 2

Name: voice

Media Type: Ethernet

VLAN 802.10 Id: 100002

State: Operational

MTU: 1500

Backup CRF Mode: Disabled

Remote SPAN VLAN: No

*********

switch# sh runn

....

vtp mode transparent

....

interface FastEthernet0/23

switchport mode trunk

switchport voice vlan 2

no ip address

spanning-tree portfast

....

*********

AP1231: sh runn

.....

interface FastEthernet0

no ip address

no ip route-cache

duplex auto

speed auto

ntp broadcast client

!

interface FastEthernet0.1

encapsulation dot1Q 1 native

no ip route-cache

bridge-group 1

no bridge-group 1 source-learning

bridge-group 1 spanning-disabled

!

interface FastEthernet0.2

encapsulation dot1Q 2

no ip route-cache

bridge-group 2

no bridge-group 2 source-learning

bridge-group 2 spanning-disabled

!

*********

router: sh runn

.....

interface FastEthernet0/0

ip address 192.168.100.254 255.255.255.0

ip access-group I_LAN_in in

no ip redirects

no ip unreachables

no ip proxy-arp

ip nat inside

ip virtual-reassembly

ip route-cache flow

speed auto

no cdp enable

pflunkert · ‎09-09-2004

Hi Robert,

on the router you must configure sub-interfaces.

int fast 0/0.1

encap dot1q native

ip address .....

int fast 0/0.2

encap dot1q

ip address .....

The ip address for vlan 1 and 2 is different. On the catalyts 2950 you must on the link to the router also configure a trunk (as describe earlier).

Regards

Peter

Robert_Berger · ‎09-09-2004

Hi Peter,

is there no simplar way ?

(for example only on AP definitions - this is just a small demo equipment)

can the two ip address be in same netmask or must they be two separated?

Robert

pflunkert · ‎09-09-2004

Hi Robert,

for demo lab it's really necessary to use 2 vlans. In a working enviroment you should do it. The AP must priorize the voice traffic. And it's easier to this with a seperate vlan. Furthermore you should remember that in a normal enviroment are also phone connected to the switch. So it's better to have one vlan for voice and one vlan for data traffic. The configurations is very difficult.

Regards

Peter

Robert_Berger · ‎09-09-2004

Peter,

thanks a lot.

So i will try to do also the config in router.

The router is now also in production use, so i have to do it on a night job.

Robert