03-19-2019 08:06 AM
Hi,
I am configuring catalyst 9300 switches for a customer and they are adamant to connect their phones on separate independent ports and insist on configuring he dhcp pool for voice vlans in the Switch itself.
What would be the best config for the phones(Unify Openscape Desk phones)?
How will the dhcp options work in this case?
Will I be able to prioritise voice traffic with Qos commands?
Please Help
Thanks
Joseph.
03-21-2019 02:21 AM
Hi karinatan,
Firstly enable DHCP for IP Phones in Openscape business, secondly reserve a small range of IP addresses while configuring DHCP in your openscape business system. Now follow these steps.
#int vlan 10
#ip add 192.168.0.5 255.255.255.0 <--- (define your voice subnet accordingly)
#ip helper-address 192.168.0.1 <--- (Ip address of your unify openscape LAN segment)
#description VOICE
#end
#int gig 0/1
#switchport mode access
#switchport access vlan 5 <-- Vlan 5 represents your data vlan here for example)
#switchport voice vlan 10 <-- Vlan 10 represents your voice vlan here for example)
#end
In this manner your phones and PC's will work on same switchport, secondly you won't be needing QOS as they will work fine without any hassle.
03-26-2019 06:27 AM
Hi M Talha,
Thanks for your response. Yes it is possible to have DHCP set up in the phone system. But it can only do one scope.
I have got 9 voice vlans altogether.
Any other ideas?
Thanks
Joseph.
03-26-2019 06:37 AM
03-26-2019 08:04 AM
Hi,
You can assign only one Voice VLAN per port. Can you explain a bit more about the network? Is it an ISP network? I never have seen 8 or 9 voice VLANs in my life. I think network design is not correct if it is not ISP.
How to assign VLAN on port:
Interface gig X/X/X
switchport mode access
switchport access voice vlan X --> Voice VLAN
switchport access vlan Y -->DATA VLAN
spanningtree portfast
Yes, If you have multiple VLANs and many users then it is advised to enable the QoS on 9k. I am not sure about the phones is capable to mark QoS. If yes, then you can use the Switch's Auto QoS configuration.
Regards,
Deepak Kumar
03-26-2019 10:19 PM
Dear Karinatan,
If you have 9 voice vlans than all you have to do is enter voice gateway ip address i.e your UNIFY system IP while configuring your phones, so that these phones gets registered on UNIFY server and start working. In IP phones you have option like this
IP add : 192.168.X.X
Mask : 255.255.255.0
Subnet GW: 192.168.X.X
VOIP Gateway : 192.168.X.X
Once you enter these phones will register and start working
Regards,
Talha
03-26-2019 10:34 PM
Hi @M Talha ,
as his client is configured nine VLANs for voice then you can imagine how big is the network? Do you think, manual TCP IP process will easy?
Regards,
Deepak Kumar
03-26-2019 11:41 PM
It won't be easy as you have to configure each phone manually but that is the only way out. I have came across this scenario at a financial institution which consist of thousand phones almost and each floor has different vlan for voice. But its been done in stages not at once so i don't have any overhead to complete the task at once.
Regards,
Talha
03-27-2019 01:43 AM
Hi,
Have you learned about the DHCP option 150 & 66?
Regards,
Deepak kumar
03-27-2019 02:11 AM
I knew about these DHCP options but in my scenario there was no option of DHCP server as client insisted to stick on manual configs.
Regards,
Talha
03-29-2019 07:20 AM
03-31-2019 11:39 PM - edited 03-31-2019 11:40 PM
If its possible for you setup a DHCP server which can do the job quite well enough for voice vlans and data as well.
Regards,
Talha
04-01-2019 09:58 AM
Hi,
Which Voice is implemented in your office? Can you check again for the required DHCP option? Because Option 43 is using for the Wireless AP to get WLC IP address (most of the vendors).
Regards,
Deepak Kumar
04-02-2019 07:03 AM
Hi,
We are using Unify(previously Siemens) handsets- Unify Open stage Desk phones.
Thanks
Joseph.
04-02-2019 08:31 AM
Hi,
Use the below guide:
https://wiki.unify.com/wiki/VLAN_ID_Discovery_over_DHCP#DHCP_Option_43_tags
https://wiki.unify.com/images/c/c7/OpenStage_Provisioning_Interface_Developer%27s_Guide.pdf
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide