[Junos/Juniper] EX4500 FPC X PEM X is not supported

FPC X PEM X is not supported This message is most commonly associated with having one power supply that is front exhaust and another that is rear exhaust. What’s not in Juniper documentation is that this message is also associated with power supplies made by different manufacturers. To avoid this message use power supplies from […]

[Juniper/EX4200] /sbin/install: Permission denied.

When trying to for an install (in this case a format install) of JunOS sometimes the following will occur while logged in as root: root@% install –format jinstall-YOURPACKAGE-signed.tgz /sbin/install: Permission denied. It will install correctly if install it from loader> prompt. You must have your USB drive connected before rebooting. Get there by hitting spacebar […]

[Junos] mount_msdosfs: /dev/da1s1: Invalid argument

When trying to mount a USB thumb drive in a Juniper EX3200 switch I received the following error: root@:RE:0% mount -t msdos /dev/da1s1 /var/tmp/usb mount_msdosfs: /dev/da1s1: Invalid argument The file system was FAT and everything worked fine when mounted in my workstation.  I simply reformatted the FAT partition on my workstation and recopied the contents […]

[JunOS/Juniper EX2200] truncated or corrupted package during JunOS install

When performing a JunOS upgrade we ran into the following error.  We received it with different versions on multiple attempts: hostname> request system software add install-ex-2200-releaseRrevision-domestic-signed.tgz   Checking pending install on fpc0   Validating on fpc0 truncated or corrupted package: /var/tmp/install-ex-2200-releaseRrevision-domestic-signed.tgz We were installing the image from a flash drive plugged into the EX2200 switch. […]

[JunOS/Juniper EX2200] mgd: unable to execute /usr/sbin/ffp: Bad file descriptor

When setting up a used EX2200 switch we encountered the following error when performing a commit check: {master:0}[edit] root# commit check mgd: unable to execute /usr/sbin/ffp: Bad file descriptor mgd: unable to execute /usr/sbin/ffp: Bad file descriptor error: foreign file propagation (ffp) failed We checked the file system and those binary didn’t exist so we’re […]

[JunOS/Cisco IOS] Setting up an EtherChannel between Juniper and Cisco devices

Cisco devices by default use PAgP (Port Aggregation Protocol) when establishing EtherChannel connections between devices.  PAgP is a proprietary protocol that is exclusive to Cisco systems.  LACP is a protocol that accomplishes the same thing but is universal and thus available on Juniper devices.  Here’s how to set them up. Cisco side.  Here’s the configuration […]