Recently Updated Pages
Upgrade bank is empty or corrupted for FPC 0, please do standard upgrade sequence
(31 December 2012) Problem After a JunOS upgrade (in our case from 10.5R5.5 to 11.4R6.5), the swi...
This device has booted from the backup JunOS Image
(2017-01-25) Problem WARNING: THIS DEVICE HAS BOOTED FROM THE BACKUP JUNOS IMAGE It is possible t...
Storm Control
(7 June 2012) Problem: Jun 7 12:16:55 sa2-40.gridwayit.local eswd[940]: ESWD_ST_CTL_ERROR_IN_EFF...
SSH PubKey Login
(2018-12-19) Problem Want SSH Pubkey authentication for my AD-backed administrative user. Specifi...
Rescue Configuration
(25 June 2012) Problem I have an amber Alarm LED but both the web interface and the CLI alarm com...
Remote Admin Authentication Via Radius
(2013-04-05) On The Switch This grants all members of an appropriate group super-user level acces...
QOS
(2016-03-07) Quick QOS Setup for Voice This is valid for JunOS 12.3R3.4 set class-of-service clas...
Port VLAN Gotcha
(2013-11-15) Problem I have a VLAN with ports defined as so: set vlans MyLAN interface ge-0/0/16....
OS Shell
(2021-10-27) Problem I want shell on the switch. Solution > start shell sh
Maximum Spanning Tree Diameter
(2019-07-11) What is the maximum diameter of a spanning tree? By default, the maximum number of l...
VLAN IP Interface
(2023-01-19) IP address on a VLAN # show | display set | match Test set vlans Test-2500 descripti...
Useful Commands
Notes for Juniper EX4200 JunOS 10.1 Showing the config in "set" commands rather than brace-format...
Switch Forwarding Table
Switching Table Look at the current forwarding table: root@sa4-39> show ethernet-switching table ...
Reverting Configurations
Rolling Back Commits Every time you make a change through the web UI it counts as a "commit". Som...
Virtual Chassis Setup
(2014-08-13) These notes are for JunOS 12.3R3.4. You do not need an enhanced license to use Virtu...
Snmp query: Requested table is empty or does not exist
(7 September 2012) Problem When you run switchwalk, it complains that a table is empty or missing...
Sample First-Boot Config
(2013-07-19) This is how I configure my EX2200 when I first get them. New EX2200 Initial Setup We...
Logging Out Stale Sessions
(2016-09-07) Problem There's an edit session, that you are not connected to, that you want to clo...
LAG and LACP
(27 June 2012) on JunOS 10.4r5.5 Simple LAG Creation Tell the switch how many aggregated ethernet...
Deleting a vc-port
(2016-02-24) Problem By default, the 40Gb interfaces on the back are defined as vc-ports for Virt...