H3C Technologies H3C S12500-X Series Switches - Manual (Page 36)

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• Use only host routes with a 32-bit mask to establish LSPs.
By default, LDP uses only host routes with a 32-bit mask to establish LSPs. The other two methods can
result in more LSPs than the default policy. To change the policy, be sure that the system resources and
bandwidth resources are sufficient.
To configure an LSP generation policy:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter LDP view or enter
LDP-VPN instance view.
• Enter LDP view:
mpls ldp
• Enter LDP-VPN instance view:
a. mpls ldp
b. vpn-instance vpn-instance-name
N/A
3. Configure an LSP
generation policy. lsp-trigger { all | prefix-list
prefix-list-name }
By default, LDP uses only host
routes with a 32-bit mask to
establish LSPs.
Configuring the LDP label distribution control mode
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter LDP view or enter
LDP-VPN instance view.
• Enter LDP view:
mpls ldp
• Enter LDP-VPN instance view:
a. mpls ldp
b. vpn-instance vpn-instance-name
N/A
3. Configure the label
distribution control mode.
label-distribution { independent | ordered }
By default, the Ordered
label distribution mode is
used.
To apply the new setting to
LDP sessions established
before the command is
configured, you must reset
the LDP sessions.
Configuring a label advertisement policy
A label advertisement policy uses IP prefix lists to control the FEC-label mappings advertised to peers.
As shown in
Figure 14 , LSR A advertises label mappings for FECs permitted by IP prefix list B to LSR B and
advertises label mappings for FECs permitted by IP prefix list C to LSR C.