Setting Other Lldp Parameters - HP 5120 EI Series Lan Switching Configuration Manual

Step
2. Enter Ethernet interface
view or port group view.
3. Allow LLDP to advertise
the management
address in LLDPDUs and
configure the advertised
management address.
4. Configure the encoding
format of the
management address as
character string.

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 neighboring device. The TTL is expressed by
using the following formula:
TTL = Min (65535, (TTL multiplier × LLDPDU transmit interval))
As the expression shows, the TTL can be up to 65535 seconds. TTLs greater than 65535 will be rounded
down to 65535 seconds.
Configuration restrictions and guidelines
• 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.
Configuration procedure
To change the TTL multiplier:
Step
Enter system view.
1.
Command
•
Enter Layer 2 Ethernet interface
view:
interface interface-type
interface-number
•
Enter port group view:
port-group manual
port-group-name
lldp management-address-tlv
[ ip-address ]
lldp management-address-format
string
Command
system-view
195
Remarks
Use either command.
Optional.
By default, the management address is
sent through LLDPDUs.
For a Layer 2 Ethernet port, the
management address is the main IP
address of the lowest-ID VLAN carried
on the port. If none of the carried
VLANs is assigned an IP address, no
management address will be
advertised.
Optional.
By default, the management address is
encapsulated in the numeric format.
Remarks
N/A