Unified Issu Considerations For T Series Routers; Unified Issu Platform Support - Juniper EX9200 Features Manual

High Availability Feature Guide for EX9200 Switches

Unified ISSU Considerations for T Series Routers

Unified ISSU Platform Support

164
aggregated-ether-options]
enable it after the unified ISSU process is complete.
Unified ISSU has the following caveats for T Series devices:
During the unified ISSU process on a routing matrix with TX Matrix Plus routers with
3D SIBs, only 75 percent of the traffic remains uninterrupted.
The scale supported on T640-FPC2-E, T640-FPC2-E2, T640-FPC3-E, and
T640-FPC3-E2 Flexible Port Concentrators (FPCs) is less than that supported on
T640-FPC1-ES, T640-FPC2-ES, T640-FPC3-ES, T1600-FPC4-ES, and
T640-FPC4-1P-ES FPCs because of differences in hardware configuration. Therefore,
when a unified ISSU is performed, if the configured scale on any of the FPCs is more
than what is supported on that FPC, field-replaceable unit (FRU) upgrade of that FPC
fails. To check the current hardware configuration of an FPC, use the
operational command.
The PD-4XGE-XFP PIC goes offline during a unified ISSU if the PIC is installed in a
T-1600-FPC4-ES with part number 710-013037 revision 12 or earlier.
In the FPCs on T4000 routers, interface-specific and firewall filter statistics are
preserved across a unified ISSU. During the unified ISSU, counter and policer operations
are disabled.
To preserve statistics across a unified ISSU on T4000 routers with FPC/PIC interfaces,
the router stores the statistics data as binary large objects. The router collects the
statistics before the unified ISSU is initialized, and restores the statistics after the
unified ISSU completes. No statistics are collected during the unified ISSU process.
To verify that statistics are preserved across the unified ISSU, you can issue CLI
operational commands such as
completes.
Table 10 on page 165 lists the platforms that support unified ISSU when dual Routing
Engines are installed and the first Junos OS release that supports unified ISSU on those
platforms. In addition to verifying that your platform supports unified ISSU, you need to
verify that the field-replaceable unit, such as PICs, that are installed also support unified
ISSU.
To access an interactive tool for verifying hardware support for unified ISSU, see the
Juniper Networks Feature Explorer (
hierarchy level before the unified ISSU process begins and
show interfaces statistics
http://pathfinder.juniper.net/feature-explorer/
show chassis fpc
after the unified ISSU
).
Copyright © 2017, Juniper Networks, Inc.