topic IP Phone problem in ExtremeSwitching (EXOS/Switch Engine)

IP Phone problem

tolganetwork — Mon, 26 Sep 2022 07:24:37 GMT

Hello Community

Clients taking IP from the untagged vlan subnet as wanted but also Phones taking IP from the untagged vlan subnet. That shouldnt be like this.
In other vendor switches phones taking IP from the voice vlan with same config. Phone settings are default, auto negotiation and LLDP enabled.

Phone Model : SIP T46S
Topology connection is switch --> Phone --> Client
My switch config

Summit # create vlan voice
Summit # configure vlan voice tag 10
Summit # configure vlan voice add port 1,11-12 tagged
Summit # create vlan data
Summit # configure vlan data tag 11
Summit # configure vlan data add port 1 tagged
Summit # configure vlan data add port 5,11-12 untagged

Also i tried QOS config template but did not work either.

Summit #create qosprofile qp7
Summit #configure diffserv examination code-point 46 qp7
Summit #config dot1p type 6 qp7
Summit # enable diffserv examination port 1
Summit # disable dot1p examination port 1

Can somebody help me to figure out.

Re: IP Phone problem

dpanev — Mon, 26 Sep 2022 11:46:54 GMT

Do you have a nac?

Fast solution would be configuring static ips for the phones ? Would that be an option?

You could configure Routing between the two vlans. If you have a dhcp running in the phone vlan?

Re: IP Phone problem

CThompsonEXOS — Mon, 26 Sep 2022 12:31:48 GMT

Do you know if the phones use CDP or LLDP to "move" to the voice vlan?

If using LLDP, you may need something like the following added:
https://extremeportal.force.com/ExtrArticleDetail?an=000088898

Thanks,

Chris Thompson

Re: IP Phone problem

OscarK — Mon, 26 Sep 2022 12:35:46 GMT

It is better described in this article.

https://extremeportal.force.com/ExtrArticleDetail?an=000083139

You need something like below.

configure lldp port <port number> advertise vendor-specific med capabilities
configure lldp port <port number> advertise vendor-specific dot1 vlan-name vlan <VOIP vlan>

Re: IP Phone problem

tolganetwork — Mon, 26 Sep 2022 12:43:01 GMT

Thank you for reply

> No there is no NAC in the campus network.

> We cant manually configure the phones because so many of them in the network.

> There is no routing problem between dhcp server with vlans.

Re: IP Phone problem

tolganetwork — Mon, 26 Sep 2022 12:48:09 GMT

Phones using lldp and i can see the lldp neighbor and infos from the switch.

Thank you for reply i ll try ur solution.

Re: IP Phone problem

tolganetwork — Mon, 26 Sep 2022 12:48:56 GMT

Thank you for reply i will try these commands.