Tech Note on ROMMON Image that cannot be Downgraded below 15.3(3r)S

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Updated:October 25, 2017
Document ID:212380

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    Introduction

    This document describes the issue of ROMMON image on PowerPC based ASR boards that cannot be downgraded beyond 15.3(3r)S.

    The manufacturer of the ROMMON boot flash for the ASR1000 PowerPC-based cards discontinued the product and replaced it with a new version. To support the new device, an update to the ROMMON was required.

    Problem: ROMMON Image cannot be Downgraded below 15.3(3r)S

    Boards with the newer flash device cannot be downgraded to a ROMMON image lower than 15.3(3r)S. Even though the boards with the old and the new flash operate the same way, the ROMMON image CANNOT be downgraded below 15.3(3r)S on boards with the new flash device.

    Boards affected are:

    • ASR1000-RP1
    • ASR1002
    • ASR1000-ESP5
    • ASR1000-ESP10
    • ASR1000-ESP20
    • ASR1000-SIP10
    • ASR1000-SIP40

    Solution

    No workaround for this issue. In general, units with serial number JAE1843062E and above have the new flash populated and cannot be downgraded below ROMMON 15.3(3r)S. Affected units are:

    ASR1000-RP1 V09

    ASR1002
    		V07
    ASR1000-ESP5 V05
    ASR1000-ESP10 V07
    ASR100-ESP20 V05
    ASR1000-SIP10 V10
    ASR1000-SIP40 V03

     PIDs, ESP20 and SIP-40 are still shipping from manufacturing. The rest are End of Production and still being supported by Services.

    TAC Authored

    Contributed by Cisco Engineers

    • David Chen
      Cisco TAC Engineer

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