Enabling Lldp To Automatically Discover Ip Phones; Configuration Prerequisites - HP 5120 EI Series Lan Switching Configuration Manual

Step
3. Add a recognizable OUI
address.
4. Enter interface view.
5. Configure the port to operate
in manual voice VLAN
assignment mode.
6. Assign the access, trunk, or
hybrid port in manual voice
VLAN assignment mode to the
voice VLAN.
7. Configure the voice VLAN as
the PVID of the trunk or hybrid
port.
8. Enable voice VLAN on the
port.

Enabling LLDP to automatically discover IP phones

In a traditional voice VLAN network, the switch maps the source MAC addresses of IP phones to a limited
number of OUI addresses to allow them to access the network. This method restricts the types of IP
phones on the network, if the IP phones with the source MAC addresses match the same OUI address are
categorized as a type.
To break the restriction, you can enable the switch to automatically discover IP phones through LLDP. With
this function, the switch can automatically discover the peer, and exchange LLDP TLVs with the peer. If the
LLDP System Capabilities TLV received on a port shows that the peer is phone capable, the switch
determines that the peer is an IP phone and sends an LLDP TLV carrying the voice VLAN configuration to
the peer.
When the IP phone discovery process is complete, the port will automatically join the voice VLAN and
improve the transmission priority of the voice traffic for the IP phone. To ensure that the IP phone can pass
authentication, the switch will add the MAC address of the IP phone to the MAC address table.

Configuration prerequisites

Before you enable the switch to automatically discover IP phones through LLDP, complete the following
tasks:
• Enable LLDP globally and on ports.
Configure voice VLANs.
•
Command
voice vlan mac-address oui mask
oui-mask [ description text ]
interface interface-type
interface-number
undo voice vlan mode auto
For the configuration procedure,
see "Configuring VLANs."
For the configuration procedure,
see "Configuring VLANs."
voice vlan vlan-id enable
154
Remarks
Optional.
By default, each voice VLAN has
default OUI addresses configured.
For the default OUI addresses of
different vendors, see Table
N/A
By default, the manual voice VLAN
assignment mode is disabled.
After you assign an access port to
the voice VLAN, the voice VLAN
becomes the PVID of the port
automatically.
Optional.
This operation is required for
untagged inbound voice traffic
and prohibited for tagged inbound
voice traffic.
Disabled by default.
14.