Nonstop Active Routing Support For Rsvp-Te Lsps - Juniper EX9200 Features Manual

Nonstop Active Routing Support for RSVP-TE LSPs

Copyright © 2017, Juniper Networks, Inc.
Nonstop active routing support for MSDP preserves the following MSDP-related
information across the switchover:
MSDP configuration and peer information
MSDP peer socket information
Source-active and related information
However, note that the following restrictions or limitations apply to nonstop active routing
MSDP support:
Because the backup Routing Engine learns the active source information by processing
the source-active messages from the network, synchronizing of source active
information between the master and backup Routing Engines might take up to 60
seconds. So, no planned switchover is allowed within 60 seconds of the initial replication
of the sockets.
Similarly, Junos OS does not support two planned switchovers within 240 seconds of
each other.
Junos OS enables you to trace MSDP nonstop active routing events by including the
statement at the
nsr-synchronization
Junos OS extends nonstop active routing support to label-switching routers (LSRs) and
Layer 2 Circuits that are part of an RSVP-TE LSP. Nonstop active routing support on LSRs
ensures that the master to backup Routing Engine switchover on an LSR remains
transparent to the network neighbors and that the LSP information remains unaltered
during and after the switchover.
You can use the show rsvp version
and state on an LSR. Similarly, you can use the
commands on the backup Routing Engine to view the state recreated on the backup
Routing Engine.
The Junos OS nonstop active routing feature is also supported on RSVP
point-to-multipoint LSPs. Nonstop active routing support for RSVP point-to-multipoint
egress and transit LSPs was added in Junos OS Release 11.4, and for ingress LSPs in
Release 12.1. During the switchover, the LSP comes up on the backup Routing Engine that
shares and synchronizes the state information with the master Routing Engine before
and after the switchover. Nonstop active routing support for point-to-multipoint transit
and egress LSPs ensures that the switchover remains transparent to the network
neighbors, and preserves the LSP information across the switchover.
However, Junos OS nonstop active routing support for RSVP point-to-multipoint LSPs
does not include support for dynamically created point-to-multipoint LSPs, such as
VPLS.
Starting with Release 14.1, Junos OS extends nonstop active routing support to the
next-generation multicast VPNs (MPVNs).
Chapter 8: Nonstop Active Routing System Requirements
[edit protocols msdp traceoptions]
command to view the nonstop active routing mode
show mpls lsp
flag
hierarchy level.
and
show rsvp session
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