H3C Technologies H3C S7500E Series Switches - Manual (Page 252)

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Configuration Prerequisites
Before configuring an LDP instance, be sure to complete these tasks:
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Configuring a VPN instance
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Configuring MPLS basic capability
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Configuring MPLS LDP capability
Configuration Procedure
Follow these steps to configure an LDP instance:
To do… Use the command… Remarks
Enter system view system-view —
Enable LDP capability for a VPN
instance and enter MPLS LDP
VPN instance view
mpls ldp vpn-instance
vpn-instance-name
Required
Not enabled by default
Configure the LDP parameters
except LDP GR for the VPN
instance
See MPLS Basics Configuration in
the MPLS Configuration Guide for
the detailed configuration.
Optional
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Except the command for LDP GR, all commands available in MPLS LDP view can be configured
in MPLS LDP VPN instance view. For detailed information about MPLS LDP, see MPLS Basics
Configuration in the MPLS Configuration Guide.
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Configurations in MPLS LDP VPN instance view affect only the LDP-enabled interface bound to
the VPN instance, while configurations in MPLS LDP view do not affect interfaces bound to VPN
instances. When configuring the transport address of an LDP instance, you need to use the IP
address of the interface bound to the VPN instance.
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By default, LDP adjacencies on a private network are established using addresses of the
LDP-enabled interfaces, while those on the public network are established using the LDP LSR ID.
Configuring Basic MPLS L3VPN
This section describes how to configure a simple MPLS L3VPN, where only one carrier is involved, the
MPLS backbone is not inter-provider, and none of the PEs or CEs functions as a PE and a CE at the
same time.
Some special MPLS L3VPN networking scenarios such as HoVPN, multi-role host, and inter-provider
VPN require additional configurations. For more information, refer to the related sections in this
chapter.
In configuring MPLS L3VPN, the key task is to manage the advertisement of VPN routes on the MPLS
backbone and includes the management of route advertisement between PEs and CEs and that
between PEs.