Configuring Cdp Compatibility - H3C S3600V2 SERIES Layer 2-Lan Switching Configuration Manual

Step
2. Enter Ethernet interface
view or port group view.
3. Set the encapsulation
format for LLDPDUs to
SNAP.
NOTE:
LLDP-CDP (Cisco Discovery Protocol) packets use only SNAP encapsulation.

Configuring CDP compatibility

When the switch is directly connected to a Cisco device that supports only CDP rather than LLDP, you can
enable CDP compatibility to enable the switch to exchange information with the directly-connected
device.
With CDP compatibility enabled on the switch, the switch can use LLDP to receive and recognize the CDP
packets received from the directly-connected device and send CDP packets to the directly-connected
device. The packets that the switch sends to the neighboring CDP device carry the fields in
Table 27 Fields in CDP packets
Field
Device ID
Addresses
Port ID
Capabilities
Software Version
Platform
Duplex
MTU
System Name
Native VLAN
Voice VLAN
The CDP neighbor-information-related fields in the output of the display lldp neighbor-information
command show the CDP neighboring device information that can be recognized by the switch. For more
Command
•
Enter Layer 2/Layer 3 Ethernet interface
view:
interface interface-type interface-number
•
Enter port group view:
port-group manual port-group-name
lldp encapsulation snap
Description
Device ID, which is the bridge MAC address of the device.
IPv4 address of the interface.
The port IPv4 address is the main IP address of the VLAN interface that is in up
state and whose corresponding VLAN ID is the lowest among the VLANs
permitted on the port. If none of the VLAN interfaces of the permitted VLANs is
assigned an IP address or all VLAN interfaces are down, no port IP address will
be advertised.
Port ID.
Device capability, which is Switch.
Software version of the device.
Device model.
Duplex mode of the port.
Maximum transmit unit.
System name.
PVID of a port.
VLAN specified by using the lldp voice-vlan command or the voice VLAN
configured on the port.
235
Remarks
Use either command.
Ethernet II encapsulation
format applies by default.
Table 27.