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DES-7200 Configuration Guide Chapter 1 MPLS Configuration
1-10
1.2 Configuring MPLS
1.2.1 Procedures for Configuring
Basic MPLS
To configure basic MPLS forwarding functions, perform the following configuration procedures:
Enabling MPLS Globally (Mandatory)
Enabling LDP Globally (Mandatory)
Enabling Label Switching on an Interface (Mandatory)
Caution
For the router products, the ip ref command must be used in the interface
configuration mode to enable the router MPLS express forwarding function
and improve the forwarding performance.
Enabling LDP on an Interface (Mandatory)
Configuring MPLS mtu on an Interface (Optional)
Fragmenting MPLS Packets (Optional)
Handling ICMP Error Messages (Optional)
Configuring the MPLS TTL Replication Function (Optional)
Verifying the MPLS Information (Optional)
Caution
1. The LDP is a topology-driven protocol. To ensure the normal working of
the LDP, you should enable IPv4 routing protocols and ensure their normal
operations.
2. For the router products, the ip ref command must be used in the interface
configuration mode to enable the router MPLS express forwarding function
and improve the forwarding performance.
1.2.1.1 Enabling MPLS Globally
In the configuration mode, you can run the mpls ip command to enable a device to support
MPLS forwarding. By default, MPLS is disabled on a device. After MPLS is enabled, the device
first forwards packets according to their labels rather than IP addresses. When the label
forwarding fails, the device then attempts to forward packets based on their IP addresses.
Run the no mpls ip command to disable MPLS forwarding.
Command Function
DES-7200(config)# mpls ip
Enable MPLS globally.