[Juniper] Junos更新韌體(Firmware)版本

邊做邊學，順便留個筆記，若有錯誤請不吝指教。

Junos基本操作及root密碼設定可參考我之前的文章：Juniper Junos基本操作、root密碼設定

所有設備都應該定期更新韌體(Firmware)版本以降低資安風險。

更新韌體前要先進行版本確認，在命令模式下執行下列指令：

    KerKer@sw1> show version                   
    fpc0:
    --------------------------------------------------------------------------
    Model: ex4600-40f
    Junos: 18.1R3-S9.1
    JUNOS Base OS Software Suite [18.1R3-S9.1]
    JUNOS Base OS boot [18.1R3-S9.1]
    JUNOS Crypto Software Suite [18.1R3-S9.1]
    JUNOS Crypto Software Suite [18.1R3-S9.1]
    JUNOS Online Documentation [18.1R3-S9.1]
    JUNOS Kernel Software Suite [18.1R3-S9.1]
    JUNOS Packet Forwarding Engine Support (qfx-ex-x86-32) [18.1R3-S9.1]
    JUNOS Routing Software Suite [18.1R3-S9.1]
    JUNOS jsd [i386-18.1R3-S9.1-jet-1]
    JUNOS SDN Software Suite [18.1R3-S9.1]
    JUNOS Enterprise Software Suite [18.1R3-S9.1]
    JUNOS Web Management Platform Package [18.1R3-S9.1]
    JUNOS py-base-i386 [18.1R3-S9.1]
    JUNOS py-extensions-i386 [18.1R3-S9.1]
    QFX Installation Software [18.4R2-S5.4]
    JUNOS Host Software [18.1R3-S6.1]

使用下列指令執行更新，指令最後面要改成自己的路徑及檔名：

    KerKer@sw1> request system software add /var/tmp/jinstall-host-ex-4600-18.4R2-S5.4-signed.tgz

下了這條指令後就會開始執行韌體更新，更新完成後會有提視需要重新啟動，依提示內容執行下列指令：

    KerKer@sw1> request system reboot at now

重啟完成後再次確認版本：

    KerKer@sw1> show version 
    fpc0:
    --------------------------------------------------------------------------
    Model: ex4600-40f
    Junos: 18.4R2-S5.4
    JUNOS Base OS boot [18.4R2-S5.4]
    JUNOS Base OS Software Suite [18.4R2-S5.4]
    JUNOS Crypto Software Suite [18.4R2-S5.4]
    JUNOS Crypto Software Suite [18.4R2-S5.4]
    JUNOS Online Documentation [18.4R2-S5.4]
    JUNOS Kernel Software Suite [18.4R2-S5.4]
    JUNOS Packet Forwarding Engine Support (qfx-ex-x86-32) [18.4R2-S5.4]
    JUNOS jsd [i386-18.4R2-S5.4-jet-1]
    JUNOS Routing Software Suite [18.4R2-S5.4]
    JUNOS SDN Software Suite [18.4R2-S5.4]
    JUNOS Enterprise Software Suite [18.4R2-S5.4]
    JUNOS Web Management Platform Package [18.4R2-S5.4]
    JUNOS Openconfig [18.4R2-S5.4]
    JUNOS py-base-i386 [18.4R2-S5.4]
    JUNOS py-extensions-i386 [18.4R2-S5.4]
    JUNOS Host Software [18.1R3-S6.1]

參考資料：https://www.juniper.net/documentation/en_US/junos/topics/topic-map/install-and-upgrade-firmware.html

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