Juniper ACX1000 Configuration Manual page 607

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Copyright © 2017, Juniper Networks, Inc.
Make sure that remote LFA allows asymmetric remote neighbor discovery—that is, it
2.
must send periodic targeted hello messages to the router that initiated the remote
neighbor for LDP auto-targeted adjacency.
Configure link protection or node-link protection on the PLR.
3.
To configure remote LFA backup over LDP tunnels in an OSPF network:
Enable remote LFA backup to determine the backup next hop using dynamic LDP
1.
label-switched path.
[edit protocols ospf backup-spf-options]
user@host# set remote-backup-calculation
Enable automatically targeted LDP sessions using the loopback addresses between
2.
the PLR and the remote LFA node.
[edit protocols ldp]
user@host# set auto-targeted-session
Specify a time interval for which the targeted LDP sessions are kept up even after the
3.
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
Specify the maximum number of automatically targeted LDP sessions to optimize
4.
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
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
Chapter 18: Configuring Routing Protocols
549