There are cases where one needs to deploy the VoIP phones in the existing network and due to lack of internal cabling you cant connect IPphones separately to switches.
The VoIP phones are usually connected to the switch and a Desktop is connected to IPphone as show below
In this scenario we can use LLDP ( Link layer discovery protocol) to advertise the Voice vlan details to IPphone so that we can get IP addresses on VoIP LAN and can add priority to the VoIP traffic.
Basic requirement : The VoIP phone should be LLDP capable
Below is the configuration required on Extreme Switch
Create Voice Vlan and we will use default Vlan for the Data Network
create vlan "VOICE"
configure vlan VOICE tag 100
configure vlan Default add ports 1:1 untagged
configure vlan VOICE add ports 1:1 tagged
Configure LLDP on the interface
configure lldp transmit-interval 5
enable lldp ports 1:1
configure lldp port 1:1 advertise port-description
configure lldp port 1:1 advertise system-name
configure lldp port 1:1 advertise system-capabilities
configure lldp port 1:1 advertise management-address
configure lldp port 1:1 advertise vendor-specific dot1 vlan-name vlan VOICE
configure lldp port 1:1 advertise vendor-specific med policy application voice vlan VOICE dscp 46
This is it and switch is now configured to advertise Voice Vlan via LLDP to the phone and Data Vlan will be sent as untagged
Happy Calling..!!
The VoIP phones are usually connected to the switch and a Desktop is connected to IPphone as show below
In this scenario we can use LLDP ( Link layer discovery protocol) to advertise the Voice vlan details to IPphone so that we can get IP addresses on VoIP LAN and can add priority to the VoIP traffic.
Basic requirement : The VoIP phone should be LLDP capable
Below is the configuration required on Extreme Switch
Create Voice Vlan and we will use default Vlan for the Data Network
create vlan "VOICE"
configure vlan VOICE tag 100
configure vlan Default add ports 1:1 untagged
configure vlan VOICE add ports 1:1 tagged
Configure LLDP on the interface
configure lldp transmit-interval 5
enable lldp ports 1:1
configure lldp port 1:1 advertise port-description
configure lldp port 1:1 advertise system-name
configure lldp port 1:1 advertise system-capabilities
configure lldp port 1:1 advertise management-address
configure lldp port 1:1 advertise vendor-specific dot1 vlan-name vlan VOICE
configure lldp port 1:1 advertise vendor-specific med policy application voice vlan VOICE dscp 46
This is it and switch is now configured to advertise Voice Vlan via LLDP to the phone and Data Vlan will be sent as untagged
Happy Calling..!!
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