[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 […]