Specifications

Upgrading from Junos OS Release 9.2 or Earlier on a Router Enabled for Both PIM
and NSR
Junos OS Release 9.3 introduced NSR support for PIM for IPv4 traffic. However, the
following PIM features are not currently supported with NSR. The commit operation fails
if the configuration includes both NSR and one or more of these features:
•
Anycast RP
•
Draft-Rosen multicast VPNs (MVPNs)
•
Local RP
•
Next-generation MVPNs with PIM provider tunnels
•
PIM join load balancing
Junos OS Release 9.3 introduced a new configuration statement that disables NSR for
PIM only, so that you can activate incompatible PIM features and continue to use NSR
for the other protocols on the router: the nonstop-routing disable statement at the [edit
protocols pim] hierarchy level. (Note that this statement disables NSR for all PIM features,
not only incompatible features.)
If neither NSR nor PIM is enabled on the router to be upgraded or if one of the unsupported
PIM features is enabled but NSR is not enabled, no additional steps are necessary and
you can use the standard upgrade procedure described in other sections of these
instructions. If NSR is enabled and no NSR-incompatible PIM features are enabled, use
the standard reboot or ISSU procedures described in the other sections of these
instructions.
Because the nonstop-routing disable statement was not available in Junos OS Release
9.2 and earlier, if both NSR and an incompatible PIM feature are enabled on a router to
be upgraded from Junos OS Release 9.2 or earlier to a later release, you must disable
PIM before the upgrade and reenable it after the router is running the upgraded Junos
OS and you have entered the nonstop-routing disable statement. If your router is running
Junos OS Release 9.3 or later, you can upgrade to a later release without disabling NSR
or PIM–simply use the standard reboot or ISSU procedures described in the other sections
of these instructions.
To disable and reenable PIM:
1. On the router running Junos OS Release 9.2 or earlier, enter configuration mode and
disable PIM:
[edit]
user@host# deactivate protocols pim
user@host# commit
2. Upgrade to Junos OS Release 9.3 or later software using the instructions appropriate
for the router type. You can either use the standard procedure with reboot or use ISSU.
3. After the router reboots and is running the upgraded Junos OS, enter configuration
mode, disable PIM NSR with the nonstop-routing disable statement, and then reenable
PIM:
163Copyright © 2015, Juniper Networks, Inc.
Migration, Upgrade, and Downgrade Instructions