Lldp And Cdp - Cisco 220 Series Smart Plus Administration Manual

Administration: Discovery

LLDP and CDP

STEP 1
STEP 2
STEP 3
LLDP and CDP
Cisco 220 Series Smart Plus Switches Administration Guide Release 1.0.0.x
To globally enable or disable Bonjour:
Click Administration > Discovery Bonjour.
Check Enable to enable Bonjour Discovery globally on the switch, or uncheck to
disable it globally.
Click Apply. Bonjour is enabled or disabled on the switch, and the Running
Configuration is updated.
Link Layer Discovery Protocol (LLDP) and Cisco Discovery Protocol (CDP) are link
layer protocols for directly-connected LLDP and CDP-capable neighbors to
advertise themselves and their capabilities to each other. By default, the switch
sends an LLDP/CDP advertisement periodically to all its interfaces and terminates
and processes incoming LLDP and CDP packets as required by the protocols. In
LLDP and CDP, advertisements are encoded as TLV (Type, Length, Value) in the
packet.
The following are additional points about CDP and LLDP configuration:
• CDP and LLDP can be enabled or disabled globally as well as on each port.
The CDP or LLDP capability of a port is relevant only if CDP or LLDP is
globally enabled.
• If CDP or LLDP is globally enabled, the switch filters out incoming CDP or
LLDP packets from ports that are CDP-disabled or LLDP-disabled.
• If CDP or LLDP is globally disabled, the switch can be configured to discard,
VLAN-aware flooding, or VLAN-unaware flooding of all incoming CDP or
LLDP packets. VLAN-aware flooding floods an incoming CDP or LLDP
packet to the VLAN where the packet is received excluding the ingress
port. VLAN-unaware flooding floods an incoming CDP or LLDP packet to all
the ports excluding the ingress port. The default is to discard CDP or LLDP
packets when CDP or LLDP is globally disabled. You can configure the
discard or flooding of incoming CDP and LLDP packets from the CDP
Properties page and the LLDP Properties page respectively.
• The CDP and LLDP end devices, such as IP phones, learn the voice VLAN
configuration from CDP and LLDP advertisements. By default, the switch is
enabled to send out CDP and LLDP advertisement based on the voice
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