HP FlexNetwork NJ5000, Руководство пользователя

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182
Figure 178 The global setup tab
3.
Set the global LLDP setup as described in Table 76 .
4.
Click
Apply
.
A progress dialog box appears.
5.
Click
Close
on the progress dialog box when the progress dialog box prompts that the
configuration succeeds.
Table 76 Configuration items
Item Description
LLDP Enable Select from the list to enable or disable global LLDP.
CDP Compatibility
Select from the list to enable or disable CDP compatibility of LLDP.
When you configure CDP compatibility, follow these guidelines:
•
To enable LLDP to be compatible with CDP on a port, you must set the
CDP operating mode on the port to TxRx and enable CDP compatibility on
the
Global Setup
tab.
•
Because the maximum TTL allowed by CDP is 255 seconds, you must
make sure the product of the TTL multiplier and the LLDP frame
transmission interval is less than 255 seconds for CDP-compatible LLDP to
work correctly with Cisco IP phones.
Fast LLDPDU
Count Set the number of LLDP frames sent each time fast LLDP frame transmission is
triggered.
TTL Multiplier
Set the TTL multiplier.
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
TTL multiplier × LLDP frame transmission interval
.
When you configure the TTL multiplier, follow these guidelines:
•
If the product of the TTL multiplier and the LLDP frame transmission
interval is greater than 65535, the TTL carried in transmitted LLDP frames
takes 65535 seconds.
•
Because the maximum TTL allowed by CDP is 255 seconds, you must