JunOS Intro -- excellent for the Cisco trained
Hats off to INE for the JunOS Intro course for Network Engineers (Cisco trained)
I needed to ramp-up on JunOS for a possible migration. This series made it easy to transfer my understanding of the basic technologies (cisco studies) over to the JunOS structure and command-line.
BrianM went back-and-forth between the standard IOS command-line and the JunOS command-line, sometimes showing IOS-XR also.
Thanks. Please keep these kind of videos coming for the AAP members.
Setup used for JunOS practice:
I was able to download a demo JunOS VM image for free from the Juniper website.
After I installed the VM in Virtual-Box, it was a simple installation into GNS3 as a VM.
With 8 gigs on my laptop, I easily loaded a few JunOS images (cloned) and built IGP networks for practice/testing.
JunOS VM image vs IOS-vXR image
JunOS is a much lighter image to install than IOS-vXR (demo downloaded). 2gigs on harddrive + 1gig memory I think I must have 3GB memory for a single XR vm image to come up. (please correct me if I am wrong about this).
Only initial problem with using either VM images, was configuring the virtual interfaces. Again, JunOS was much easier to setup, once it was understood.
But IOS-XR seems to reboot with unpredictable interfaces, very difficult to have a saved lab using multiple interfaces. Finally, I just went with a single interface in XR and trunked it to a switch (INE style).
JunOS has a Stateful Firewall by default -- arrrggh (many hours lost on this)
This cost me many hours. I knew I had a security issue, but did not know how to disable it. Finally BrianM explained the issue and the fix @14 minutes of this video -- JunOS Ethernet Interfaces & Ethernet Switching :: Part 2
### following three commands changed from flow-based -- BrianM
set security forwarding-options family mpls mode packet-based
set security forwarding-options family iso mode packet-based
set security forwarding-options family inet6 mode packet-based
### must reboot to have affect
request system reboot
Links for VM Installation: I will need to look this up again. Started at GNS3 forum.