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label advertise
Description
Use the label advertise command to specify what type of label the egress should distribute to the
penultimate hop.
Use the undo label advertise command to restore the default.
By default, the egress distributes an implicit null label to the penultimate hop.
The type of label for an egress to distribute depends on whether the penultimate hop supports PHP. If the
penultimate hop supports PHP, you can configure the egress to distribute the explicit null or implicit null
label to the penultimate hop. If the penultimate hop does not support PHP, you need to configure the
egress to distribute a normal label.
If LDP sessions have been established, you need to use the reset mpls ldp command to reset the sessions
to bring the label advertise command into effect.
Syntax
label advertise { explicit-null | implicit-null | non-null }
undo label advertise
View
MPLS view
Default level
2: System level
Parameters
explicit-null: Specifies the egress to distribute to the penultimate hop an explicit null label, whose value is
0.
implicit-null: Specifies that the egress supports PHP and distributes to the penultimate hop an implicit null
label, whose value is 3.
non-null: Specifies that the egress does not support PHP and distributes to the penultimate hop a normal
label, whose value is not less than 1024.
Examples
# Configure the egress to distribute an explicit null label to the penultimate hop.
<Sysname> system-view
[Sysname] mpls
[Sysname-mpls] label advertise explicit-null
label-distribution
Description
Use the label-distribution command to specify the label distribution control mode.
Use the undo label-distribution command to restore the default.
The default mode is ordered.
You must use the reset mpls ldp command to reset LDP sessions so that this command takes effect for those
sessions.
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