Setting An Encapsulation Format For Lldpdus; Configuring Cdp Compatibility - H3C S5120-EI Configuration Manual

To do...
Set the number of LLDPDUs sent
each time fast LLDPDU transmission
is triggered
NOTE:
To make sure that LLDP neighbors can receive LLDPDUs to update information about the current device
•
before it ages out, configure both the LLDPDU transmit interval and delay to be less than the TTL.
• It is a good practice to set the LLDPDU transmit interval to be no less than four times the LLDPDU transmit
delay.
If the LLDPDU transmit delay is greater than the LLDPDU transmit interval, the device uses the LLDPDUs
•
transmit delay as the transmit interval.

Setting an encapsulation format for LLDPDUs

LLDPDUs can be encapsulated in the following formats: Ethernet II or SNAP frames.
• With Ethernet II encapsulation configured, an LLDP port sends LLDPDUs in Ethernet II frames and
processes only incoming, Ethernet II encapsulated LLDPDUs.
With SNAP encapsulation configured, an LLDP port sends LLDPDUs in SNAP frames and processes
•
only incoming, SNAP encapsulated LLDPDUs.
By default, Ethernet II frames encapsulate LLDPDUs. If the neighbor devices encapsulate LLDPDUs in
SNAP frames, configure the encapsulation format for LLDPDUs as SNAP to guarantee normal
communication with the neighbors.
Follow these steps to set the encapsulation format for LLDPDUs to SNAP:
To do...
Enter system view
Enter Ethernet
interface view
or port group
view
Set the encapsulation format for
LLDPDUs to SNAP
NOTE:
LLDP-CDP (Cisco Discovery Protocol) packets use only SNAP encapsulation.

Configuring CDP compatibility

NOTE:
For more information about voice VLANs, see the chapter "Voice VLAN configuration."
Use the command...
lldp fast-count count
Use the command...
system-view
Enter Layer 2
interface interface-type
Ethernet interface
interface-number
view
Enter port group
port-group manual port-group-name
view
lldp encapsulation snap
185
Remarks
Optional
3 by default.
Remarks
—
Required
Use either command.
Required
Ethernet II encapsulation
format applies by default.