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1514 CHAPTER 95: MPLS BASICS CONFIGURATION COMMANDS
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A pre-header is the content prefixed to a packet according to the matched entry in
the fast forwarding cache. It varies depending on the type of the outgoing packet
■ For an outgoing IP packet, the pre-header is a link layer header.
■ For an outgoing MPLS packet, the pre-header consists of a link layer header
and the labels.
■ An outgoing L2VPN packet is directly forwarded out of the outgoing interface
in the matched fast forwarding entry. No pre-header is prefixed to the packet.
display mpls ilm
Syntax display mpls ilm [ label ] [ include text ]
View Any view
Parameters label: Incoming label, in the range 16 to 4294967295.
include text: Specifies ILM entries including a specified string.
Description Use the
display mpls ilm command to display information about the ILM table.
With no incoming label specified, the command displays the ILM entries of all
incoming labels.
Examples # Display the ILM entry with a specified incoming label.
<Sysname> display mpls ilm 1024
Inlabel In-Interface Token VRF-Index Oper LSP-Type Swap-Label
--------------------------------------------------------------------------
1024 S2/0 2 0 POP NORMAL ----
1 Record(s) Found
# Display all ILM entries.
<Sysname> display mpls ilm
Inlabel In-Interface Token VRF-Index Oper LSP-Type Swap-Label
--------------------------------------------------------------------------
Table 366 Description on the fields of display mpls fast-forwarding cache
Field Description
Label Label used as the index of the fast forwarding
cache entry
Input_If Incoming interface
Output_If Outgoing interface
Len Length of the pre-header, in bytes
Flg Flag for indicating the packet type. It can be IP,
MPLS, or L2VPN.
Used Number of times the entry has been used
Fast-Forwarding Cache PreIIpHead Content of the pre-header for an IP packet
Fast-Forwarding Cache PreMPLSHead Content of the pre-header for an MPLS packet