topic RE: Cisco IP phone couldn't obtain voice vlan from Enterasys switch in ExtremeSwitching (EOS)

Cisco IP phone couldn't obtain voice vlan from Enterasys switch

Hossam_Youssef — Fri, 29 Jul 2016 18:37:00 GMT

I need a help as the Cisco IP phone couldn't obtain the voice vlan by LLDP,
the IP phone model=7911G, it's firmware=9.2.1
Extreme switch: 800-series verson 1.3.4

I made the following configuration but nothing work (IP phone connected to port 15)

# VLAN

config vlan default add untagged 9-16
config vlan default advertisement enable
create vlan 30 tag 30
config vlan 30 add tagged 15 advertisement enable
disable qinq
disable gvrp
disable vlan_trunk
config port_vlan 9-16 gvrp_state disable ingress_checking enable acceptable_frame admit_all pvid 1

# LLDP

enable lldp
config lldp tx_delay 2
config lldp message_tx_interval 30
config lldp message_tx_hold_multiplier 4
config lldp reinit_delay 2
config lldp notification_interval 5
config lldp ports 9-14,16 notification disable
config lldp ports 9-16 admin_status tx_and_rx
config lldp ports 15 notification enable

# LLDP-MED

config lldp_med log state enable
config lldp_med fast_start repeat_count 4
config lldp_med ports 15 med_transmit_capabilities capabilities network_policy state enable

RE: Cisco IP phone couldn't obtain voice vlan from Enterasys switch

Chester_Balut — Mon, 01 Aug 2016 19:27:00 GMT

Hello Hossam,

Can you add the following line to the configuration and re-test:

config lldp_med network_policy add app_type voice vlan vlan_id 30 t_field tagged

RE: Cisco IP phone couldn't obtain voice vlan from Enterasys switch

Anderson_Vaugha — Mon, 01 Aug 2016 21:08:00 GMT

Hossam has also logged a case with the Gtac which I am working on.
In the tech-support the voice vlan is called voice1 with a tag of 3
And the configuration has the following line:-

config lldp_med network_policy add app_type voice vlan vlan_id 3 t_field tagged l2_pri_field 0 dscp_field 0

The network capture attached to the case shows that the switch is sending out a network policy for vlan ID 3 but the capture was not started at the very begining.

I have spoken to Hossam and I will work directly with him on this case and I will update this post later.

RE: Cisco IP phone couldn't obtain voice vlan from Enterasys switch

Hossam_Youssef — Mon, 01 Aug 2016 23:21:00 GMT

Do you mean you need to see the packet caputre after connect the cables with the mirror port

RE: Cisco IP phone couldn't obtain voice vlan from Enterasys switch

Anderson_Vaugha — Tue, 02 Aug 2016 01:05:00 GMT

I mean it looks like the capture may of been started after the Cisco IP phone was already connected. Therefore to ensure that we have captured everything I would like you to gather another capture. I will call you tomorrow morning and run through the steps.

RE: Cisco IP phone couldn't obtain voice vlan from Enterasys switch

Anderson_Vaugha — Fri, 12 Aug 2016 19:32:00 GMT

For the configuration of VoIP phones on 800 Series switches see the following article:-

https://gtacknowledge.extremenetworks.com/articles/Q_A/LLDP-MED-configuration-for-800-series-switch

We have tested various VoIP phones such as Siemens (Unify) and Polycom CX600.
Regarding the issue with the Cisco 7911G I am continuing to work with Hossam via a Gtac case.