R21xx-HP FlexFabric 11900 MPLS Command Reference

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Examples
# Configure two label advertisement policies. One policy advertises only the label mapping for subnet
10 .1.1. 0 / 24 t o t h e p e e r 3 .3. 3 . 9 ; t h e o t h e r p o l i c y advertises only the label mapping for subnet
10.2.1.0/24 to the peer 4.4.4.9.
<Sysname> system-view
[Sysname] ip prefix-list prefix-to-C permit 10.1.1.0 24
[Sysname] ip prefix-list prefix-to-D permit 10.2.1.0 24
[Sysname] ip prefix-list peer-C permit 3.3.3.9 32
[Sysname] ip prefix-list peer-D permit 4.4.4.9 32
[Sysname] mpls ldp
[Sysname-ldp] advertise-label prefix-list prefix-to-C peer peer-C
[Sysname-ldp] advertise-label prefix-list prefix-to-D peer peer-D
Related commands
• display mpls ldp fec
• ip prefix-list (Layer 3—IP Routing Command Reference)
• lsp-trigger
backoff
Use backoff to configure the LDP backoff initial delay time and maximum delay time.
Use undo backoff to restore the default.
Syntax
backoff initial initial-time maximum maximum-time
undo backoff
Default
The LDP backoff initial delay time is 15 seconds and the maximum delay time is 120 seconds.
Views
LDP view, LDP-VPN instance view
Predefined user roles
network-admin
Parameters
initial initial-time: Specifies the LDP backoff initial delay time in the range of 15 to 50331 seconds.
maximum maximum-time: Specifies the LDP backoff maximum delay time in the range of 120 to 50331
seconds.
Usage guidelines
LDP peers continually negotiate with each other until a session is set up. If LDP peers use incompatible
negotiation parameters (for example, different label advertisement modes), a large amount of
negotiation traffic will enter the network. To suppress LDP session negotiation traffic, use this command
to control the interval between negotiation attempts.
After LDP fails to establish a session with a peer LSR for the first time, LDP does not start another attempt
until the initial delay timer expires. If the session setup fails again, LDP waits for two times the initial delay