3com S7906E 설치 설명서

 

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CDP-compatible LLDP operates in one of the follows two modes: 

z 

TxRx, where CDP packets can be transmitted and received.  

z 

Disable, where CDP packets can neither be transmitted nor be received.  

To make CDP-compatible LLDP take effect on certain ports, first enable CDP-compatible LLDP globally 

and configure CDP-compatible LLDP to operate in TxRx mode.  

Follow these steps to enable LLDP to be compatible with CDP: 

Enter system view 

— 

Enable CDP compatibility 
globally 

Required 

Disabled by default.  

Enter 
Ethernet 
interface view 

interface interface-type 
interface-number 

Enter Ethernet 
interface view 
or port group 
view 

Enter port 
group view 

port-group manual 
port-group-name 

Required 

Use either command. 

Configure CDP-compatible 
LLDP to operate in TxRx mode 

Required 

By default, CDP-compatible LLDP 
operates in disable mode.  

 

As the maximum TTL allowed by CDP is 255 seconds, ensure that the product of the TTL multiplier and 

the LLDPDU transmit interval is less than 255 seconds for CDP-compatible LLDP to work properly with 

Cisco IP phones. 

 

LLDP trapping is used to notify the network management system (NMS) of events such as new 

neighboring devices detected and link malfunctions. 

To prevent excessive LLDP traps from being sent when topology is unstable, you can set a minimum 

trap sending interval for LLDP.  

Follow these steps to configure LLDP trap: 

Enter system view 

— 

Enter Ethernet 
interface view 

interface interface-type 
interface-number 

Enter Ethernet 
interface view 
or port group 
view 

Enter port group 
view 

port-group manual 
port-group-name 

Required 

Use either command. 

Enable LLDP trap sending 

lldp notification remote-change 
enable 

Required 

Disabled by default