Specifications

•
Support for GPS external clock interface on the SCBE (MX240, MX480, and
MX960)—Starting with Junos OS Release 13.3, you can configure the Enhanced
SCB—SCBE—external clock interface to a GPS timing source, which enables you to
select a GPS external source as the chassis clock source. You can also configure the
external clock interface to output either the selected chassis clock source or a recovered
line clock source with GPS timing signals of 1 MHz, 5 MHz, or 10 MHz with 1 pulse per
second (PPS).
[See Centralized Clocking Overview and Understanding Clock Synchronization on MX
Series Routers.]
•
Support for mixed-rate mode (T4000 and TX Matrix Plus with 3D SIBs)—Starting
with Junos OS Release 13.3, dual-rate mode or mixed-rate mode for PF-24XGE-SFPP
allows you to configure a mix of port speeds of 1 Gigabit and 10 Gigabit. However, on
PF-12XGE-SFPP, note that you can configure port speeds of either 1 Gigabit or 10 Gigabit
when the PIC is in line rate mode.
You can enable mixed-rate-mode and set port speeds with the mixed-rate-mode
statement and the speed 1G |10G statement, respectively, at the [edit chassis fpc x pic
y] hierarchy level. You can disable the mixed-rate mode by using the delete chassis fpc
x pic y mixed-rate-mode statement.
[See Configuring Mixed-Rate Mode Operation.]
•
Extended MPC support for per-unit schedulers (MX Series)—Starting in Junos OS
Release 13.3, you can configure per-unit schedulers on the non-queuing 16x10GE MPC,
MPC3E, and MPC4E, meaning you can include the per-unit-scheduler statement at the
[edit interfaces interface name] hierarchy level. When per-unit schedulers are enabled,
you can define dedicated schedulers for the logical interfaces.
Enabling per-unit schedulers on the 16x10GE MPC, MPC3E, and MPC4E adds additional
output to the show interfaces interface name [detail | extensive] command. This
additional output lists the maximum resources available and the number of configured
resources for schedulers.
[See Scheduler Maps and Shaping Rate to DLCIs and VLANs.]
•
Provider edge link protection for BGP labeled unicast paths (M Series, MX Series,
and T Series)—Starting in Junos OS Release 13.3, a precomputed protection path can
be configured in a Layer 3 VPN such that if a BGP labeled-unicast path between an
edge router in one AS and an edge router in another AS goes down, the protection path
(also known as the backup path) between alternate edge routers in the two ASs can
be used. This is useful in carrier-of-carriers deployments, where a carrier can have
multiple labeled-unicast paths to another carrier. In this case, the protection path
avoids disruption of service if one of the labeled-unicast paths goes down.
[See Understanding Provider Edge Link Protection for BGP Labeled Unicast Paths.]
•
Redundant logical tunnels (MX Series)—Beginning with Junos OS Release 13.3, when
you connect two devices through logical tunnels, you can create and configure multiple
physical logical tunnels and add them to a virtual redundant logical tunnel to provide
redundancy.
37Copyright © 2015, Juniper Networks, Inc.
New and Changed Features