HP 5820X Series User Manual

209
To do… Use the command… Remarks
4. Configure the encoding format of
the management address as
character string
lldp management-address-
format string
Optional.
By default, the management
address is encapsulated in the
numeric format.
Setting other LLDP parameters
The Time To Live TLV carried in an LLDPDU determines how long the device information carried in the
LLDPDU can be saved on a recipient device.
By setting the TTL multiplier, you can configure the TTL of locally sent LLDPDUs, which determines how
long information about the local device can be saved on a neighbor device. The TTL is expressed using
the following formula:
TTL = Min (65,535, (TTL multiplier × LLDPDU transmit interval))
As the expression shows, the TTL can be up to 65,535 seconds. TTLs greater than 65,535 will be
rounded down to 65,535 seconds.
To change the TTL multiplier:
To do… Use the command… Remarks
1. Enter system view
system-view —
2. Set the TTL multiplier
lldp hold-multiplier value
Optional
4 by default
3. Set the LLDPDU transmit
interval
lldp timer tx-interval interval
Optional
30 seconds by default
4. Set LLDPDU transmit delay
lldp timer tx-delay delay
Optional
2 seconds by default
5. Set the number of LLDPDUs
sent each time fast LLDPDU
transmission is triggered
lldp fast-count count
Optional
3 by default
To ensure that the LLDP neighbors can receive LLDPDUs to update information about the current device
before it is aged out, configure both the LLDPDU transmit interval and delay to be less than the TTL.
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
only processes incoming Ethernet II-encapsulated LLDPDUs.
• With SNAP encapsulation configured, an LLDP port sends LLDPDUs in SNAP frames and only
processes incoming SNAP-encapsulated LLDPDUs.
By default, LLDPDUs are encapsulated in Ethernet II frames. 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:

HP 5820X Series Specifications

General

Brand	HP
Model	5820X Series
Category	Switch
Language	English