Specifications

Class of Service (CoS)
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Support for strict-priority scheduling (PTX Series)—Beginning with Junos OS Release
13.3, interfaces on PTX Series routers support strict-priority scheduling. Configured
queues are processed in strict-priority order. Within the guaranteed region, multiple
CoS queues that compete in the same hardware-based priority level are selected
based on the packet round-robin algorithm, while within the excess region, selection
is based on the WRR algorithm. The queues receive equal share when they send the
same packet size. Otherwise, the queues receive shares proportional to the respective
packet sizes sent. To enable configuration of strict-priority scheduling for a physical
interface on a PTX Series router, include the strict-priority-scheduler statement in the
traffic control profile associated with the interface.
[See Understanding Scheduling on PTX Series Routers.]
General Routing
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Nonstop active routing support for logical systems (PTX Series)— Starting in Junos
OS Release 13.3, this feature enables nonstop active routing support for logical systems
using the nonstop-routing option under the [edit logical-systems logical-system-name
routing-options] hierarchy. As a result of extending nonstop active routing support for
logical systems, the logical-systems argument has been appended in some show
operational commands to allow display of status, process, and event details.
High Availability (HA) and Resiliency
•
Nonstop active routing support for BGP addpath (PTX Series)—Beginning in Junos
OS Release 13.3, nonstop active routing support for BGP addpath is available on the
PTX Series. Nonstop active routing support is enabled for the BGP addpath feature.
After the nonstop active routing switchover, addpath-enabled BGP sessions do not
bounce. The secondary Routing Engine maintains the addpath advertisement state
before the nonstop active routing switchover.
Interfaces and Chassis
•
FPC self-healing (PTX Series)—Starting in Junos OS Release 13.3, PTX Series routers
allow you to configure Packet Forwarding Engine-related error levels (fatal, major, or
minor) and the actions to perform (alarm, disable-pfe, or log) when a specified
threshold is reached. Previously, Packet Forwarding Engine-related errors would disable
the FPC. Using this command Packet Forwarding Engine errors can be isolated thereby
reducing the need for a field replacement. This command is available at the [edit
chassis fpc slot-number] and [edit chassis] hierarchy levels.
•
2-port 100-Gigabit DWDM OTN PIC (PTX3000)—Beginning with Junos OS Release
13.3, the 2-port 100-Gigabit dense wavelength division multiplexing (DWDM) optical
transport network (OTN) PIC is supported by Type 5 FPCs on PTX3000 routers. The
100-Gigabit DWDM OTN PIC supports the following features:
•
Transparent transport of two 100-Gigabit Ethernet signals with OTU4 framing
•
ITU-standard OTN performance monitoring and alarm management
Copyright © 2015, Juniper Networks, Inc.168
Release Notes: Junos OS Release 13.3R6 for the EX Series, M Series, MX Series, PTX Series, and T Series