Configuring A Static Lsp; Configuration Prerequisites; Configuration Procedure - H3C S9500 Series Operation Manual

Operation Manual – MPLS Basics
H3C S9500 Series Routing Switches
A label value of 3 represents an implicit null label and never appears in the label
stack. When an LSR finds that it is assigned an implicit null label, it directly
performs a pop operation, rather than substitutes the value for the original label at
the stack top.
Follow these steps to configure PHP:
Enter system view
Enter MPLS view
Specify the egress to
support PHP and set the
type of the label to be
distributed to the
penultimate hop

1.6 Configuring a Static LSP

An LSP can be static or dynamic. A static LSP is manually configured, while a dynamic
LSP is established by MPLS LDP.
For a static LSP to work, all LSRs along the LSP must be configured properly.
Static LSPs can be used in MPLS L2VPN.
Note:
For configuration of MPLS L2VPN, refer to MPLS L2VPN Configuration in the MPLS
VPN Volume.

1.6.1 Configuration Prerequisites

Before configuring a static LSP, be sure to complete these tasks:
Determining the ingress, transit LSRs, and egress for the static LSP
Configuring MPLS basic capability on all the LSRs

1.6.2 Configuration Procedure

Follow these steps to configure a static LSP:
To do...
system-view
mpls
label advertise
{ explicit-null |
implicit-null | non-null }
Chapter 1 MPLS Basics Configuration
Use the command...
1-19
Remarks
—
—
Optional
By default, an egress
supports PHP and
distributes to the
penultimate hop an
implicit null label.
Note that you must reset
LDP sessions for the
configuration to take
effect.