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Go to Maintain Update J-Web in the side pane, and click Check for updates. If the latest update is available on the Juniper Networks server, the Update Available window appears. Click Update Now in the Update Available window. If the switch is connected to the Internet, the Update J-Web window appears.
Each Junos OS image for an EX Series switchthat supports PoE contains the most recent version of the PoE controllersoftware at the time the Junos OS image was built. When you upgradeJunos OS on your switch, the new image might contain a more recentversion of the PoE controller software than is currently running onthe PoE controller. You can upgrade your PoE controller software byrequesting that the more recent version of the software containedin the Junos OS image be downloaded to the controller.
NotePowered devices are not guaranteed to receive power whilethe new software is being downloaded to the PoE controller, a processthat can take up to 10 minutes. In addition, during the software download,some PoE operational commands, such as show poe interface, might not show correct output.We recommend that you upgrade your PoE controller software duringa regularly scheduled maintenance window.
NoteOn an EX8200 Virtual Chassis, you cannot execute PoE commandson the XRE200 External Routing Engine. You can execute PoE commandsonly on the member EX8200 switches. Use the member-id command to open a CLI session on a member switch.
This topic covers:
Determining Whether the PoE Controller Software Needs Upgrading
To determine whether the version of the PoE controller softwaresupplied with Junos OS is more recent than the version of the softwarecurrently running on the PoE controller, enter the following command:
The New PoE software upgrade available text in theoutput indicates that the PoE controller software is out-of-date andneeds to be upgraded.
For Virtual Chassis or switches with PoE line cards, the outputof the request system firmware upgrade poe fpc-slot 0
To upgrade the PoE controller software on a specific VirtualChassis member or line card on a switch, enter:
user@switch> request system firmware upgrade poe fpc-slot all-members
Monitoring the Upgrade Progress
Use the n%)
When the software upgrade is complete, the New PoE softwareupgrade available text is no longer displayed for the particularFPC.
NoteIf you are upgrading the PoE controller software to enableenhanced PoE, the Status field for the controller shows AF_ENHANCEafter the upgrade completes, indicating that the controller now supportsenhanced PoE. The default maximum power per port is not automaticallyincreased as a result of the upgrade—it is still 15.4 W perport. You must explicitly set the maximum power for a port to 18.6W. Enhanced PoE is supported in Junos OS Release 11.1 or later onEX3200 switches and on EX4200-P or EX4200-T model switches.
There are various ways you can upgrade and backup JunOS Image of Juniper SRX device. You can use either web console or command line. When performing an upgrade there is always some chances of failure. So, to be able to recover from catastrophic failures, always create a backup before upgrading the JunOS operating system.
Upgrade and Backup JunOS Image of Juniper SRX Device
In this example I am using Juniper SRX 300 to backup and upgrade firmware of the device using command-line. I will also show how to do the upgrades in SRX cluster.
Backup JunOS Image of Juniper SRX device
To create a backup to USB type the following command in operational mode
You can view the snapshot information on USB by typing following command,
Just in case, to reboot the device from the backup USB stick enter the following command in operational mode
Type Yes and press Enter button on the keyboard. The device will now reboot and load the OS from USB stick.
Upgrading the JunOS Software
First of all download the latest JunOS software from Juniper’s website www.juniper.net. Now copy that downloaded JunOS file into the USB stick. Remember that the USB Stick must have FAT32 file type partitioned or the upgrade won’t work. Then, log in to the device using root user. We need to mount the USB stick into the device first. Type the following command from shell prompt.
After you hit enter you will see the above output. These are partitions of the JunOS in SRX. Now, insert the USB stick into the SRX device. Again type the previous command.
Here we can notice that there are three new partition of the USB stick. Note that /dev/da1s1 or /dev/da1s5 is the one you must mount. Now create a folder named flash under /var/tmp. This will be the mounting location. Now type the following command to create the folder.
Now mount the USB stick to flash folder. To do so type following commands,Note: – You might get following error if the location you entered is not correct. You can try different location randomly (the bolded and underlined ones that are listed above)After mounting you can view the lists of files under USB Flash Drive by typing this command.
Jut if you need unmount the USB stick, type following cmdBy now what we have done is, just inserted the USB in the device and the USB stick is visible. You can install JunOS directly from the USB or copy the installation file to other location and start the install. To install JunOS directly from USB type following commands,
You can also copy the installation file into the device’s hard disk after mounting is done. Here I will copy to /var/tmp location. To do so type following commands: –
After copying the file, exit from shell mode and remove the USB from device. To install the JunOS, enter the following command in operation mode.
The device will install the software and reboot the SRX. In this way you can upgrade JunOS in SRX device.
Now, what if the SRX devices are in cluster. How do you perform the upgrade? To upgrade branch series SRX cluster, you need to upgrade the SRX device one by one and then reboot all device in cluster at the same time. You can mount the USB and copy installation file to say node 0 and upgrade the node 0 first. Then you can copy the file from node 0 to node 1 and then upgrade node 1. You can also use same USB to mount and copy files to node 1. To copy file from node 0 to node 1 directly, type following command,
After copying the JunOS file to node 1, login to node 1 device. To switch the login, type following command.
Now you can upgrade node 1 and reboot both device at the same time.
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Bipin is a freelance Network and System Engineer with expertise on Cisco, Juniper, Microsoft, VMware, and other technologies. You can hire him on UpWork . Follow Bipin Giri on Google+. Bipin enjoys writing articles and tutorials related to Network technologies. Some of his certifications are, MCSE:Messaging, JNCIP-SEC, JNCIS-ENT, and others.
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