display mpls ldp lsp fault-analysis

Function

The display mpls ldp lsp fault-analysis command displays causes for failures to establish LDP LSPs.

Format

display mpls ldp lsp fault-analysis ip-address mask

display mpls ldp lsp fault-analysis vpn-instance vpn-instance-name ip-address mask

Parameters

Parameter	Description	Value
ip-address	Displays causes for a failure to establish an LDP LSP with a specified IP address.	The value is in dotted decimal notation.
mask	Specifies the mask length of a specified IP address.	The value is an integer ranging from 0 to 32.
vpn-instance vpn-instance-name	Displays causes for a failure to establish LDP LSPs in a specified VPN instance.	The value is a string of 1 to 31 case-sensitive characters, spaces not supported. In addition, the VPN instance name must not be _public_. When double quotation marks are used around the string, spaces are allowed in the string.

Parameter

Description

Value

ip-address

Displays causes for a failure to establish an LDP LSP with a specified IP address.

The value is in dotted decimal notation.

mask

Specifies the mask length of a specified IP address.

The value is an integer ranging from 0 to 32.

vpn-instance vpn-instance-name

Displays causes for a failure to establish LDP LSPs in a specified VPN instance.

The value is a string of 1 to 31 case-sensitive characters, spaces not supported. In addition, the VPN instance name must not be _public_. When double quotation marks are used around the string, spaces are allowed in the string.

Views

All views

Default Level

1: Monitoring level

Task Name and Operations

Task Name	Operations
mpls-ldp	read

Usage Guidelines

Usage Scenario

LDP LSPs can be established based on multiple conditions, such as LDP sessions, labels assigned by LDP peers, routes and their types, labels, or tokens. If LDP LSPs fail to be established, to view causes for failures to establish LDP LSPs, run the display mpls ldp lsp fault-analysis command. The command output contains causes related to the ingress, transit node, and egress.

Example

The actual command output varies according to the device. The command output here is only an example.

# Display causes for failures to establish LDP LSPs.

<HUAWEI> display mpls ldp lsp fault-analysis 10.1.1.1 32
Ingress:
    Lsp State       : Up
    Check Route     : ---
    Check Policy    : ---
    Check Ds Session: ---
    Check Ds Mapping: ---
    Check Limit     : ---
    Check Resource  : ---
Transit:
    Lsp State       : Down
    Check Route     : Pass
    Check Policy    : ---
    Check Ds Session: Pass
    Check Ds Mapping: Pass
    Check Us Request: Fail
    Check Limit     : ---
    Check Resource  : ---
Egress:
    Lsp State       : Down
    Check Route     : Fail
    Check Policy    : ---
    Check Us Request: ---
    Check Limit     : ---
    Check Resource  : ---

**Table 1** Description of the **display mpls ldp lsp fault-analysis** command output
Item	Description
Lsp State	LSP status: Up. Down.
Check Route	Route check results: Pass. Fail. ---: Routes are not checked.
Check Policy	Policy check results: Pass. Fail. ---: Policies are not checked.
Check Ds Session	Downstream session check results: Pass. Fail. ---: Downstream sessions are not checked.
Check Ds Mapping	Downstream label check results: Pass. Fail. ---: Downstream labels are not checked.
Check Limit	Threshold-crossing event check results: Pass. Fail. ---: Threshold-crossing events are not checked.
Check Resource	Resource check results: Pass. Fail. ---: Resources are not checked.
Check Us Request	Upstream request check results: Pass. Fail. ---: Upstream requests are not checked.
Ingress	Ingress information.
Transit	Transit node information.
Egress	Egress information.