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High Availability

  • Unified ISSU with enhanced mode supported on MPC11E sub-line cards (MX2010 and MX2020)—Starting in Junos OS Release 21.4R1, MX Series routers with MPC11E sub-line cards installed can use the enhanced mode ISSU option. Enhanced mode eliminates packet loss during the unified ISSU process.

    Use the request system software in-service-upgrade package-name.tgz enhanced-mode command to use unified ISSU with enhanced mode. Use the request system software validate in-service-upgrade package-name.tgz enhanced-mode command to verify that your device and target release are compatible with enhanced mode.

    [See How to Use Unified ISSU with Enhanced Mode and Sub Line Card Overview.]