display mpls forwarding nhlfe

Use display mpls forwarding nhlfe to display Next Hop Label Forwarding Entry (NHLFE) entries.

Syntax

display mpls forwarding nhlfe [ nid ] [ slot slot-number ]

display mpls forwarding nhlfe [ nid ] [ chassis chassis-number slot slot-number ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

nid: Displays the NHLFE entry with the specified NID. The NID value is in the range of 0 to 4294967294. If you do not specify an NID, this command displays NHLFE entry information for all NIDs.

slot slot-number: Specifies a card by its slot number. If you do not specify a card, this command displays NHLFE entries for the active MPU.

chassis chassis-number slot slot-number: Specifies a card on an IRF member device. The chassis-number argument represents the member ID of the IRF member device. The slot-number argument represents the slot number of the card. If you do not specify a card, this command displays NHLFE entries for the global active MPU.

Usage guidelines

An NHLFE entry records label forwarding information, such as the outgoing label and outgoing interface. NHLFE entries are mainly used to add multiple labels to packets.

To add multiple labels to a packet, an LSR performs the following operations:

Obtains the bottom label and NID in the matching FIB or ILM entry.
Obtains the outer label in the NHLFE entry identified by the NID.

Examples

# Display the NHLFE entry with NID 2048.

<Sysname> display mpls forwarding nhlfe 2048
Flags: T - Forwarded through a tunnel
       N - Forwarded through the outgoing interface to the nexthop IP address
       B - Backup forwarding information
       A - Active forwarding information
       M – P2MP forwarding information

NID        Tnl-Type Flag OutLabel Forwarding Info
--------------------------------------------------------------------------------
2048       LSP      NA   2025     Vlan10                    10.11.112.26

# Display all NHLFE entries.

<Sysname> display mpls forwarding nhlfe
Total NHLFE entries: 5

Flags: T - Forwarded through a tunnel
       N - Forwarded through the outgoing interface to the nexthop IP address
       B - Backup forwarding information
       A - Active forwarding information
       M – P2MP forwarding information

NID        Tnl-Type Flag OutLabel Forwarding Info
--------------------------------------------------------------------------------
10         -        TA   -        2049
20         -        TA   -        2050
2048       LSP      NA   2025     Vlan10                    10.11.112.26
2049       LSP      NA   3024     Vlan20                    10.11.112.26
                    TB   3026     20
2050       LSP      NA   3025     Vlan30                    10.11.113.26

Table 2: Command output

Field	Description
Total NHLFE entries	Total number of NHLFE entries.
NID	NHLFE entry index.
Tnl-Type	Tunnel type: LOCAL—Direct LSP tunnel. LSP—Static LSP tunnel, or LSP tunnel signaled using LDP or BGP. TE—TE tunnel. CRLSP—Static CRLSP/SRLSP tunnel or CRLSP tunnel signaled using RSVP. - (a hyphen)—The tunnel type is invalid.
Flag	Forwarding flag: T—Forwarded through a tunnel. N—Forwarded through the outgoing interface to the next hop IP address. B—Backup forwarding information. A—Active forwarding information. M—P2MP forwarding information. This flag is not supported in the current software version.
OutLabel	Outgoing label.
Forwarding Info	Forwarding information: When the forwarding flag is N, the forwarding information records the outgoing interface and the next hop. When the forwarding flag is T, the forwarding information records the NID.

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