display lnp

Function

The display lnp interface command displays LNP negotiation information on a Layer 2 Ethernet interface.

Format

display lnp { interface interface-type interface-number | summary }

Parameters

Parameter	Description	Value
interface interface-type interface-number	Displays LNP negotiation information on a specified Layer 2 Ethernet interface.	-
summary	Displays LNP negotiation information on all Ethernet interfaces of a Layer 2 device.	-

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

If you want to check the link type and traffic statistics of a Layer 2 Ethernet interface after enabling LNP negotiation, run the display lnp command.

To monitor the status of or locate the fault on an LNP-enabled Layer 2 Ethernet interface, run the display lnp command to obtain the status information and statistics about user packets. This information provides a basis for fault locating.

Example

# Display LNP negotiation information on a specified Layer 2 Ethernet interface.

<HUAWEI> display lnp interface gigabitethernet0/0/1

LNP information for GigabitEthernet0/0/1:
  Port link type: trunk
  Negotiation mode: desirable
  Hello timer expiration(s): 19
  Negotiation timer expiration(s): 0
  Trunk timer expiration(s): 289
  FSM state: trunk

  Packets statistics
  4 packets received
    0 packets dropped
      bad version: 0, bad TLV(s): 0, bad port link type: 0,
      bad negotiation state: 0, other: 0
  5 packets output
    0 packets dropped
      other: 0

**Table 1** Description of the display lnp interface command output
Item	Description
LNP information for	Layer 2 Ethernet interface on which LNP negotiation information is displayed
Port link type	Link-type of the Layer 2 Ethernet interface Trunk Access Hybrid dot1q-tunnel
Negotiation mode	Negotiation mode on the Layer 2 Ethernet interface, which can be configured using the port link-type command desirable auto on off
Hello timer expiration(s)	Timeout period for the Hello timer
Negotiation timer expiration(s)	Timeout period for the negotiation timer
Trunk timer expiration(s)	Timeout period for the Trunk timer
FSM state	Status of the LNP state machine
Packets statistics	Statistics about LNP packets
packets received	Number of received LNP packets
packets dropped	Number of dropped LNP packets
bad version	Number of LNP packets dropped due to incorrect versions
bad TLV(s)	Number of LNP packets dropped due to incorrect TLVs
bad port link type	Number of LNP packets dropped due to incorrect negotiation results
bad negotiation state	Number of LNP packets dropped due to incorrect negotiation states
other	Number of LNP packets dropped due to other causes
packets output	Number of sent LNP packets

# Display LNP negotiation information on all Ethernet interfaces of a Layer 2 device.

<HUAWEI> display lnp summary

Global LNP : Negotiation enable
-------------------------------------------------------------------------------
C: Configured; N: Negotiated; *: Negotiation disable;
Port         link-type(C)   link-type(N)   InDropped   OutDropped  FSM
-------------------------------------------------------------------------------
GE0/0/1      access         access                 0            0  off
GE0/0/2      desirable      access                 0            0  off
GE0/0/3      desirable      access                 0            0  off
GE0/0/4      desirable      access                 0            0  off
GE0/0/6      desirable      access                 0            0  off
GE0/0/7      desirable      access                 0            0  off
GE0/0/8      desirable      access                 0            0  off
GE0/0/9      desirable      access                 0            0  off
GE0/0/10     desirable      access                 0            0  off

**Table 2** Description of the display lnp summary command output
Item	Description
Global LNP	Whether LNP is enabled globally, which can be configured using the lnp disable command
Port	Layer 2 Ethernet interface on which LNP negotiation information is displayed
link-type(C)	Negotiation mode on the Layer 2 Ethernet interface, which can be configured using the port link-type command
link-type(N)	Negotiation result on the Layer 2 Ethernet interface
InDropped	Number of incoming LNP packets that are dropped on the Layer 2 Ethernet interface
OutDropped	Number of outgoing LNP packets that are dropped on the Layer 2 Ethernet interface
FSM	Status of the LNP state machine access trunk on off