Setting An Encapsulation Format For Lldpdus; Configuring Cdp Compatibility - HP 5120 EI Series Lan Switching Configuration Manual

Step
2. Set the TTL multiplier.
3. Set the LLDPDU transmit
interval.
4. Set the LLDPDU transmit delay.
5. Set the number of LLDPDUs
sent each time fast LLDPDU
transmission is triggered.

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.
To set the encapsulation format for LLDPDUs to SNAP:
Step
1. Enter system view.
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
Command
lldp hold-multiplier value
lldp timer tx-interval interval
lldp timer tx-delay delay
lldp fast-count count
Command
system-view
•
Enter Layer 2 Ethernet interface view:
interface interface-type interface-number
•
Enter port group view:
port-group manual port-group-name
lldp encapsulation snap
196
Remarks
Optional.
4 by default.
Optional.
30 seconds by default.
Optional.
2 seconds by default.
Optional.
3 by default.
Remarks
N/A
Use either command.
Ethernet II encapsulation
format applies by default.
Table 27.