Qos Resolution For Lldp-Med; Coexistence With Cdp; Lldp-Med And Multiple Network Devices; Lldp-Med And Ieee 802.X - Cisco 8800 Series Administration Manual

Cisco IP Phone Installation

QoS Resolution for LLDP-MED

If CoS is applicable and if CoS = 0, the default is used for the specific extension as previously described. But
the value shown on L2 Priority for TLV for outgoing LLDPDU is based on the value used for extension 1. If
CoS is applicable and if CoS != 0, CoS is used for all extensions.
If DSCP (mapped to ToS) is applicable and if DSCP = 0, the default is used for the specific extension as
previously described. But the value show on DSCP for TLV for outgoing LLDPDU is based on value used
for the extension 1. If DSCP is applicable and if DSCP != 0, DSCP is used for all extensions.
If the VLAN > 1 and VLAN < 4095, the VLAN is set accordingly. CoS and ToS are based on the default as
previously described. DSCP is applicable.
If there is a valid network policy for the voice application from LLDP-MED PDU and if the tagged flag is
set, the VLAN, L2 Priority (CoS), and DSCP (mapped to ToS) are all applicable.
If there is a valid network policy for the voice application from LLDP-MED PDU and if the tagged flag is
not set, only the DSCP (mapped to ToS) is applicable.
The Cisco IP Phone reboots and restarts the fast start sequence.

Coexistence with CDP

If both CDP and LLDP-MED are enabled, the network policy for the VLAN determines the last policy set or
changed with either one of the discovery modes. If both LLDP-MED and CDP are enabled, during startup
the phone sends CDP and LLDP-MED PDUs.
Inconsistent configuration and behavior for network connectivity devices for CDP and LLDP-MED modes
could result in an oscillating rebooting behavior for the phone due to switching to different VLANs.
If the VLAN is not set by CDP and LLDP-MED, the VLAN ID that is configured manually is used. If the
VLAN ID is not configured manually, no VLAN is supported. DSCP is used and the network policy determines
LLDP-MED if applicable.

LLDP-MED and Multiple Network Devices

You can use the same application type for network policy. However, phones receive different Layer 2 or Layer
3 QoS Network policies from multiple network connectivity devices. In such a case, the last valid network
policy is accepted.

LLDP-MED and IEEE 802.X

The Cisco IP Phone does not support IEEE 802.X and does not work in a 802.1X wired environment. However,
IEEE 802.1X or Spanning Tree Protocols on network devices could result in delay of fast start response from
switches.

Configure VLAN Settings

Before you begin
Access the phone administration web page. See Access the Phone Web Page, on page
Cisco IP Phone 8800 Series Multiplatform Phones Administration Guide
QoS Resolution for LLDP-MED
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