Administration: Discovery
LLDP and CDP
Cisco Small Business 200 Series Smart Switch Administration Guide 84
9
To globally enable Bonjour:
STEP 1 Click Administration > Discovery - Bonjour.
STEP 2 Select Enable to enable Bonjour Discovery globally on the device.
STEP 3 Click Apply. Bonjour is enabled or disabled on the device according to the
selection.
LLDP and CDP
LLDP (Link Layer Discovery Protocol) and CDP (Cisco Discovery Protocol) are link layer protocols for
directly-connected LLDP and CDP-capable neighbors to advertise themselves and their capabilities. By
default, the device sends an LLDP/CDP advertisement periodically to all its interfaces 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 CDP/LLDP configuration notes apply:
• CDP/LLDP can be enabled or disabled globally or per port. The CDP/LLDP capability of a port is
relevant only if CDP/LLDP is globally enabled.
• If CDP/LLDP is globally enabled, the device filters out incoming CDP/LLDP packets from ports that
are CDP/LLDP-disabled.
• If CDP/LLDP is globally disabled, the device can be configured to discard, VLAN-aware flooding, or
VLAN-unaware flooding of all incoming CDP/LLDP packets. VLAN-aware flooding floods an incoming
CDP/LLDP packet to the VLAN where the packet is received excluding the ingress port. VLAN-
unaware flooding floods an incoming CDP/LLDP packet to all the ports excluding the ingress port.
The default is to discard CDP/LLDP packets when CDP/LLDP is globally disabled. You can configure
the discard/flooding of incoming CDP and LLDP packets from the CDP Properties page and the
LLDP Properties page respectively.
• Auto Smartport requires CDP and/or LLDP to be enabled. Auto Smartport automatically configures
an interface based on the CDP/LLDP advertisement received from the interface.
• CDP and LLDP end devices, such as IP phones, learn the voice VLAN configuration from CDP and
LLDP advertisements. By default, the device is enabled to send out CDP and LLDP advertisement
based on the voice VLAN configured at the device. Refer to the Voice VLAN for details.
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