Juniper ACX2000

2. Make sure that remote LFA allows asymmetric remote neighbor discovery—that is, it
must send periodic targeted hello messages to the router that initiated the remote
neighbor for LDP auto-targeted adjacency.
3. Configure link protection or node-link protection on the PLR.
To configure remote LFA backup over LDP tunnels in an OSPF network:
1. Enable remote LFA backup to determine the backup next hop using dynamic LDP
label-switched path.
[edit protocols ospf backup-spf-options]
user@host# set remote-backup-calculation
2. Enable automatically targeted LDP sessions using the loopback addresses between
the PLR and the remote LFA node.
[edit protocols ldp]
user@host# set auto-targeted-session
3. Specify a time interval for which the targeted LDP sessions are kept up even after the
remote LFA node goes down.
[edit protocols ldp auto-targeted-session]
user@host# set teardown-delay seconds
For example, to set a teardown delay value of 60 seconds:
[edit protocols ldp auto-targeted-session]
user@host# set teardown-delay 60
4. Specify the maximum number of automatically targeted LDP sessions to optimize
memory usage.
[edit protocols ldp auto-targeted-session]
user@host# set maximum-sessions number of sessions
For example, to set a maximum sessions allowed to 20:
[edit protocols ldp auto-targeted-session]
user@host# set maximum-sessions 20
Related
Documentation
Remote LFA over LDP Tunnels in OSPF Networks Overview on page 547•
• Example: Configuring Remote LFA Over LDP Tunnels in OSPF Networks
• auto-targeted-session
• backup-spf-options
• no-eligible-remote-backup
• remote-backup-calculation
549Copyright © 2017, Juniper Networks, Inc.
Chapter 18: Configuring Routing Protocols