Recently Updated Pages
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...
Format Install via TFTP
(2022-06-19) Problem EX device is complaining about errors which boil down to it complaining abou...
filter-define.conf log message
(2021-10-27) Problem "cmd='ls -i /var/etc/filters/filter-define.conf'" log message generated ever...
Factory Defaults
Problem Return to factory defaults. Solution For JunOS 11.1 or higher: lab@EX2200> request system...
error: remote side unexpectedly closed connection
(2014-02-21) Problem Brand new switch, can't configure because the CLI console keeps saying: erro...
Could Not Format Alternate Root
(2021-01-26) Problem rancid@s-reserve> request system snapshot slice alternate fpc0: ------------...
Change Root Password
(20 August 2012) --- JUNOS 10.4R5.5 built 2011-06-14 02:01:48 UTC root@sa3-41:RE:0% cli root@sa3-...
TFTP Install Firmware From Loader
(2017-08-22) TFTP Installing Firmware From The Loader connect a console reboot the device interr...