Specifications

•
The PTX5000 does not support nonstop active routing in Junos OS Release 13.3.
•
The PTX5000 does not support unified in-service software upgrade (ISSU) in Junos
OS Release 13.3.
Software Installation and Upgrade
•
Unified ISSU support for the 100-Gbps DWDM OTN PIC (PTX5000)—Starting in
Junos OS Release 13.3, the 100-Gbps DWDM OTN PIC (P1-PTX-2-100G-WDM) supports
unified in-service software upgrade (ISSU) on PTX5000 routers. Unified ISSU enables
you to upgrade between two different Junos OS releases with no disruption on the
control plane and with minimal disruption of traffic.
[See Unified ISSU System Requirements.]
Related
Documentation
Changes in Behavior and Syntax on page 172•
• Known Issues on page 174
• Resolved Issues on page 176
• Documentation Updates on page 185
• Migration, Upgrade, and Downgrade Instructions on page 185
• Product Compatibility on page 188
Changes in Behavior and Syntax
This section lists the changes in behavior of Junos OS features and changes in the syntax
of Junos OS statements and commands from Junos OS Release 13.3R6 for the PTX
Series.
•
High Availability and Resilency on page 172
•
Interfaces and Chassis on page 172
•
Routing Protocols on page 173
•
User Interface and Configuration on page 173
High Availability and Resilency
•
New redundancy failover CLI statement (PTX Series)—Starting in Junos OS
Release13.3R6, the chassis redundancy failover not-on-disk-underperform statement
prevents gstatd from causing failovers in the case of slow disks on the Routing Engine.
See not-on-disk-underperform and Preventing Graceful Restart in the Case of Slow Disks.
Interfaces and Chassis
•
Change to interpolated WRED drop probability (PTX Series)—In Junos OS Releases
13.2R4 and 13.3R2, the interpolated fill level of 0 percent has a drop probability of 0
percent for weighted random early detection (WRED). In earlier Junos OS releases,
interpolated WRED can have a nonzero drop probability for a fill level of 0 percent,
Copyright © 2015, Juniper Networks, Inc.172
Release Notes: Junos OS Release 13.3R6 for the EX Series, M Series, MX Series, PTX Series, and T Series