У каталистов все просто - voice vlan. У extreme summit сложнее. Ставим vlan с тегом и конфигурим LLDP, чтобы телефон схватил именно тегированный vlan.
enable lldp ports 1-48
configure lldp port 1-48 advertise vendor-specific med capabilities
configure lldp port 1-48 advertise vendor-specific dot1 vlan-name vlan VLAN0022_IPPHONES
configure lldp port 1-48 advertise vendor-specific med power-via-mdi
configure lldp port 1-48 advertise vendor-specific med policy application voice vlan VLAN0022_IPPHONES dscp 46
Configure lldp port 1-48 advertise system-capabilities
Configure lldp port 1-48 advertise vendor-specific dot1 port-protocol-vlan-id vlan VLAN0022_IPPHONES
Смотреть тут - https://gtacknowledge.extremenetworks.com/articles/How_To/How-to-configure-LLDP-for-Extreme-switches-to-recognize-IP-phones и тут - http://www.extremenetworks.ru/blog/ip-telefonyi-i-kommutatoryi-extreme-ispolzuya-lldp/
enable lldp ports 1-48
configure lldp port 1-48 advertise vendor-specific med capabilities
configure lldp port 1-48 advertise vendor-specific dot1 vlan-name vlan VLAN0022_IPPHONES
configure lldp port 1-48 advertise vendor-specific med power-via-mdi
configure lldp port 1-48 advertise vendor-specific med policy application voice vlan VLAN0022_IPPHONES dscp 46
Configure lldp port 1-48 advertise system-capabilities
Configure lldp port 1-48 advertise vendor-specific dot1 port-protocol-vlan-id vlan VLAN0022_IPPHONES
Смотреть тут - https://gtacknowledge.extremenetworks.com/articles/How_To/How-to-configure-LLDP-for-Extreme-switches-to-recognize-IP-phones и тут - http://www.extremenetworks.ru/blog/ip-telefonyi-i-kommutatoryi-extreme-ispolzuya-lldp/