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How to check if Junos is 64 or 32 bit on a router

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Article ID: KB25803 KB Last Updated: 05 Dec 2020Version: 3.0
Summary:

This article provides information on how to check if Junos is 64 or 32 bit on a router.

Symptoms:
  • Just like any other operating system, the 64-bit version of the Junos operating system can address more memory than the 32-bit version of the operating system.

  • To support larger routing engine memory sizes, an upgrade from the 32-bit to the 64-bit Junos OS, which is running on the routing engine hardware, is necessary.

  • The upgrade path is relatively straightforward and another form of routing engine hardware and software upgrade.

Solution:

Use the command, 'show version | match kernel'

Example:

lab@router> show version | match kernel 
JUNOS OS Kernel 64-bit  [20191115.14c2ad5_builder_stable_11] <-- This router is running on a 64-bit Junos 

 
lab@router> show version | match kernel 
JUNOS OS Kernel 32-bit  [20200710.a76c78d_builder_stable_11] <-- This router is running on a 32-bit Junos
Modification History:
2020-12-05: Added related KB articles.

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