JNCIA-Junos Passed – 92%

I passed my JNCIA-Junos Tuesday morning with a score of 92%. JNCIS-SP is next, and I will hopefully have it conquered by January 1, 2012. Look forward to a lot more posts as I ramp up to prepare.

Question of the Week Coming Soon

Starting on Monday, November 14, I will be providing a “Question of the Week” that relates specifically to the JNCIA-Junos exam. It will be drawn from the materials available from the Juniper Fast Track. Some questions may be general networking questions; others will be specific to Juniper.

Here’s how it works: Every Monday, I’ll post a question. Leave comments with your answer,thoughts, or questions, and on Tuesday, I’ll update the post with the answer. I’ll also address any questions from the comments at that time.

Before the end of November, I should also be implementing a JNCIS-SP Question of the Week, which will follow the same format, except that the question will be posted on Wednesdays, with the answers provided in an update to the original post on Thursdays.

By the middle of December, my hope is to have a Lab Feature Friday event where I will develop and post JNCIA-level labs.

So keep an eye out for the new features coming in the next several weeks!

Oops, Question of the Week didn’t happen this week. I was a little caught up in studying for my JNCIA-Junos, which I took on Tuesday, November 15. I’ll be rectifying this immediately, and will proceed forward as intended above.

Configure Ethernet Interfaces in Junos

Here’s another update in a similar format to the previous post.  We’re just covering how to configure an ethernet interface with an IPv4 address, so this one will be much quicker.  We’ll make the following assumptions:

You’ve previously configured root authentication.
You’ve already logged into your router, whether it be through remote access (telnet, ssh) or local access (console port, dedicated ethernet management port)

Here’s a breakdown of the character representations of the modes for your reference:


root login and UNIX command line


Operational Mode of Junos system command line


Configuration Mode of Junos system command line.

And how to activate each of them:

% cli
> configure

Now, to add an IPv4 address to an interface, save the changes, and verify the config, issue the following commands, starting from the root prompt (‘%’):

% cli
> configure
# set interfaces ge-0/0/0 unit 0 family inet address
# commit exit
> ping

This should produce successful results.  Remember that this address is only locally pingable and not across subnets because we haven’t set up any kind of routing.

Add Interface to an OSPF Area in Junos

Just a quick update showing how easy it is to add an interface to an OSPF area. We’re going to start by navigating from a root login up to the OSPF Area 0 config level. Then, we’ll add the interface to Area 0. Please note that this assumes you have already configured an interface with the appropriate settings.

Continue reading


Welcome to Packet Talk.

Packet Talk is a log of my work, new features I find, my quest for certification, and other miscellaneous networking tidbits.

I currently work as a network analyst for a national telecommunications provider, where I monitor our network and respond to network events, escalating as necessary.

I’m studying for my JNCIA-Junos, which is scheduled for November 15, 2011.