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[EX] Resilient dual-root partitioning on XRE200

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Article ID: KB32166 KB Last Updated: 05 Aug 2020Version: 2.0
Summary:

This article explains the partitioning for Resilient Dual-Root feature on an XRE200 in an EX8208 Virtual Chassis.

Symptoms:

When users try to perform the snapshot operation on the virtual-chassis stack, the following error occurs on external REs:

error: internal media missing or invalid

Outputs:
root@lab0001> show chassis firmware
member1:
--------------------------------------------------------------------------
Part                     Type       Version
FPC 0                    U-Boot     U-Boot 1.1.6 (Jan 13 2009 - 06:55:22) 2.3.0
                         loader     FreeBSD/PowerPC U-Boot bootstrap loader 2.2
FPC 1                    U-Boot     U-Boot 1.1.6 (Mar 28 2011 - 04:06:28) 3.5.0
                         loader     FreeBSD/PowerPC U-Boot bootstrap loader 2.4
FPC 4                    U-Boot     U-Boot 1.1.6 (Mar 25 2009 - 06:13:12) 2.4.0
                         loader     FreeBSD/PowerPC U-Boot bootstrap loader 2.2
Routing Engine 0         U-Boot     U-Boot 1.1.6 (Mar 28 2011 - 04:06:28) 3.5.0
                         loader     FreeBSD/PowerPC U-Boot bootstrap loader 2.4
Routing Engine 1         U-Boot     U-Boot 1.1.6 (Mar 28 2011 - 04:06:28) 3.5.0
                         loader     FreeBSD/PowerPC U-Boot bootstrap loader 2.4
{backup:9}
root@lab0001> show system snapshot media internal
member1-re0:
--------------------------------------------------------------------------
Information for snapshot on       internal (/dev/da0s1a) (primary)
Creation date: Mar 28 12:07:17 2017
JUNOS version on snapshot:
  jbase  : ex-12.3R2.5
  jkernel-ex: 12.3R2.5
  jcrypto-ex: 12.3R2.5
  jdocs-ex: 12.3R2.5
  jswitch-ex: 12.3R2.5
  jpfe-ex82x: 12.3R2.5
  jroute-ex: 12.3R2.5
  jweb-ex: 12.3R2.5
  fips-mode-powerpc: 12.3R2.5
error: /dev/da0s2a is not a JUNOS snapshot
member1-re1:
--------------------------------------------------------------------------
Information for snapshot on       internal (/dev/da0s1a) (primary)
Creation date: Mar 28 12:07:22 2017
JUNOS version on snapshot:
  jbase  : ex-12.3R2.5
  jkernel-ex: 12.3R2.5
  jcrypto-ex: 12.3R2.5
  jdocs-ex: 12.3R2.5
  jswitch-ex: 12.3R2.5
  jpfe-ex82x: 12.3R2.5
  jroute-ex: 12.3R2.5
  jweb-ex: 12.3R2.5
  fips-mode-powerpc: 12.3R2.5
error: /dev/da0s2a is not a JUNOS snapshot
 
member8:
--------------------------------------------------------------------------
error: internal media missing or invalid
 
member9:
--------------------------------------------------------------------------
error: internal media missing or invalid
Cause:

External Routing-engines do not have dual-silent partitions. Instead, they work in a master/standby fashion. There is no boot loader upgrade required and there is no jloader for XRE200. Hence, there is no chassis firmware command on the XRE200.

Solution:

The external routing engines do not support dual root partitioning.  

There is no jloader version for XREs on the EX8200 virtual-chassis.

Modification History:
2020-08-04: Article reviewed for accuracy; no changes required.
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