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DES-7200 Configuration Guide Chapter 1 MPLS Configuration
1-26
Configuring Label Reception Policies
By default, the LDP receives all label binding information sent from all neighbors. In certain
situations, you may need to control the device to receive only some binding information about
FECs and labels from certain neighbors. In this case, you can run the neighbor ip-address
labels accept command.
Command Function
DES-7200(config-mpls-router)#
neighbor ip-address labels accept
acl- name
Configure a label reception policy.
Configuring Policies for Distributing Explicit Null Labels
By default, the LDP assigns implicit null labels to the FEC (such as direct routes) with the local
device as the egress. You can use the explicit-null command to assign explicit null labels to all
direct routes or routes that match certain ACL rules. You can also use the no explicit-null
command to restore the default setting.
Command Function
DES-7200(config-mpls-router)#
explicit-null [for prefix_acl | to
peer_acl]
Configure a device to assign explicit null labels to
all direct routes or routes that match certain ACL
rules.
DES-7200(config-mpls-router)# no
explicit-null
Restore the default setting.
Caution
1. For an FEC with the local device as the egress, the device cannot assign
explicit null labels to the FEC if the corresponding LSP is a tunnel that
carries L2VPN or L3VPN services.
2. Configure this function only for the global LDP instance. This function is
not supported by the VRF instance.
1.2.2.5 Configuring the LDP MD5
Authentication
To enhance the reliability of LDP sessions, you can configure the MD5 authentication for the
TCP connections used by the LDP sessions. You can run the neighbor ip-address password [ 0
| 7] pwd-string command to configure the MD5 authentication for TCP connections between a