Unified Issu Platform Considerations; Hardware And Software Requirements Before Beginning A Unified Issu - Juniper JUNOSE SOFTWARE FOR E SERIES 11.3.X - SERVICE AVAILABILITY CONFIGURATION GUIDE 2010-10-08 Configuration Manual

JunosE 11.3.x Service Availability Configuration Guide

Unified ISSU Platform Considerations

Hardware and Software Requirements Before Beginning a Unified ISSU

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Unified ISSU is supported on E120 and E320 routers. Unified ISSU is also supported on
the ERX1440 router with the SRP-40G PLUS with 2GB of memory. Unified ISSU on the
ERX1440 requires a license key.
For information about modules supported on E120 and E320 routers:
See E120 and E320 Module Guide, Table 1, Modules and IOAs for detailed module
specifications.
See E120 and E320 Module Guide, Appendix A, IOA Protocol Support for information
about the modules that support unified ISSU.
For information about modules supported on the ERX1440 router:
See ERX Module Guide, Table 1, ERX Module Combinations for detailed module
specifications.
See ERX Module Guide, Appendix A, Module Protocol Support for information about the
modules that support unified ISSU.
Redundant SRP modules are required for unified ISSU support.
Unified ISSU is not supported on the ERX7xx models, the ERX1410 router, and the ERX310
router.
NOTE: In JunosE Release 11.3.0, the design enhancements for reenabling CSR
FPGA upgrades are implemented, which enables you to perform a stateless
upgrade (non-unified ISSU method, with router-wide outage for users) from
JunosE releases numbered lower than Release 11.3.0 to JunosE Release 11.3.0.
However, you cannot run a unified ISSU procedure from JunosE releases that
do not contain the design changes for CSR FPGA functionality (earlier than
Release 11.3.0) to JunosE releases that contain the enhanced CSR FPGA
design (Release 11.3.0 and later releases), if the router chassis contains ES2
10G LMs or REV-02 ES2 10G LMs.
In releases numbered lower than Release 11.3.0, you could not perform either
a conventional upgrade or a unified ISSU process on ES2 10G LMs that
contained the CSR FPGA upgraded image. You could only download the
image from serial Programmable Read-Only Memory (PROM), which was a
factory image.
The following hardware and software prerequisites must be met for the successful
completion of unified ISSU. You can issue the show issu command to determine whether
the routers meets these requirements.
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