Junos Optical Power Display Bug

EX-2200 and EX-3300 series switches running 12.3R3.4 have a bug where Receiver signal average optical power values don’t display correctly. The recommended version that contains a fix for this bug is12.3R4-S1. We’ve tested this update on a few switches and it had resolved the bug.

12.3R3.4:

user@j33s> show interfaces diagnostics optics ge-0/1/0
Physical interface: ge-0/1/0
Laser bias current : 5.566 mA
Laser output power : 0.2820 mW / -5.50 dBm
Module temperature : 31 degrees C / 88 degrees F
Module voltage : 3.3680 V
Receiver signal average optical power : 0.0000 mW / - Inf dBm

12.3R4-S1:

user@j33> show interfaces diagnostics optics ge-0/1/0
Physical interface: ge-0/1/0
Laser bias current : 5.508 mA
Laser output power : 0.2810 mW / -5.51 dBm
Module temperature : 31 degrees C / 88 degrees F
Module voltage : 3.3680 V
Receiver signal average optical power : 0.2811 mW / -5.51 dBm

802.3az Energy-Efficient Ethernet on Juniper EX3300 Switches

Unlike Cisco 2960-X switches, 802.3az does not come enabled by default on Juniper EX3300 models. Use ether-options ieee-802-3az under the interface-range tree to enable this energy saving protocol.

interfaces {
    interface-range WIRED_PORTS {
        member-range ge-0/0/0 to ge-0/0/47;
        ether-options {
            ieee-802-3az-eee;
        }
    }
}

When committing this option, we noticed around 8 seconds of connectivity loss for 96 wired connected hosts. Be careful when enabling this in a production setting.

Juniper JNCIA Training

This month I have begun my JNCIA training and hope to take the exam this Spring to further my professional development. I passed the CCNA in September of 2013 and started working with Juniper devices in October of 2013 so the Juniper world is relatively new to me.

I currently work with EX2200, 3300, and 4200 switches on a daily basis so I hope that the majority of the material in the Juniper Enterprise Switching book will be review and improving my proficiency with JuneOS. A few months ago I even added a EX2200-C to my home setup so I can have more experience with the OS.

IMG_20131106_122218 IMG_20131029_125629

So far I am amazed at the design of the JuneOS platform. The candidate configuration, roll-back, and processor isolation of switching and routing processes is very different than a Cisco device where you are locked into the Cisco shell. I am beginning to see the power of the Juniper world.