H3C S5120-SI Series

1-10
Setting Other LLDP Parameters
The TTL TLV carried in an LLDPDU determines how long the device information carried in the LLDPDU
can be saved on a recipient device. You can configure the TTL of locally sent LLDPDUs to determine
how long information about the local device can be saved on a neighbor device by setting the TTL
multiplier. The TTL is expressed as follows:
TTL = TTL multiplier × LLDPDU transmit interval
Follow these steps to change the TTL multiplier:
To do… Use the command… Remarks
Enter system view
system-view
—
Set the TTL multiplier
lldp hold-multiplier value
Optional
4 by default.
Set the LLDPDU
transmit interval
lldp timer tx-interval interval
Optional
30 seconds by default
Set LLDPDU transmit
delay
lldp timer tx-delay delay
Optional
2 seconds by default
Set the number of
LLDPDUs sent each
time fast LLDPDU
transmission is
triggered.
lldp fast-count count
Optional
3 by default
z The TTL can be up to 65535 seconds. TTLs greater than it will be rounded down to 65535 seconds.
z LLDPDU transmit delay must be less than the TTL to ensure that the LLDP neighbors can receive
LLDPDUs to update information about the device you are configuring before it is aged out.
Setting the Encapsulation Format for LLDPDUs
LLDPDUs can be encapsulated in Ethernet II or SNAP frames.
z With Ethernet II encapsulation configured, an LLDP port sends LLDPDUs in Ethernet II frames and
processes only Ethernet II encapsulated incoming LLDPDUs.
z With SNAP encapsulation configured, an LLDP port sends LLDPDUs in SNAP frames and
processes only SNAP encapsulated incoming 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.
Follow these steps to set the encapsulation format for LLDPDUs to SNAP: