Cumulus 3.6 is here!

Cumulus 3.6 is here! They have released their latest version of Cumulus Linux, 3.6 and it has a few exciting new features! With the release of Cumulus 3.6 this is another step in making the network more open. New Features In the new Cumulus release they are finally able to do some important features that ...

What is a VRF?

What is a VRF? Many times I've been asked by people both in and out of the networking field questions about VRFs. What is a VRF and how is it used? Definition: VRF is an Acronym The definition of the VRF acronym is Virtual Router and Forwarder. Virtualization and networking In networking we've been doing ...

Open Accepted

WhiteBox Switching Providers

Whitebox Network Operating Systems** WhiteBox switching providers definition: these are providers of either an entire OS or an application that help to provide functionality to multiple types of switching hardware. This does mean that all software on these systems are open-source or 'Free as in speech or beer.' These machines, while not entirely open, are ...

openstack cloud image

OpenStack CLI subnet commands

OpenStack CLI subnet commands for IPv4 and IPv6 Assumptions made here: The public network has already been created That by doing a openstack subnet list there is no subnets called public-v6 or public1 You have already installed the Openstack CLI client LINK using your preferred method. You are not using the individual project CLI client ...

Google Calendar Hacks

For custom recurring events in Google calendar. ICS format is the format I recommend. I've included a suggested editor as well as two examples, and a ICS day code key. You're going to need to get out your favorite text editor, you should probably use a text editor that can edit in multiple types of ...

Email Updating ARIN IRR

While obtaining a new IP block, updating ARIN IRR, was something that I had never done before and the instructions to accomplish this were lacking, at best. ARIN email updating, the quickest way to accomplish updating the ARIN IRR; can be extremely difficult if you have never done it before. I wrote this quick blog ...

Grow LVM (Ubuntu) KVM

How to resize a VM's disk size using LVM - the hard way. Firstly, the VM should be shut down and we should increase the disk size. Then start the VM and go to the console. fdisk -u /dev/xvda (-u shows sectors instead of cylinders. This is important) (Make a note of the start sector ...

FTOS Dell LLDP System Name

After working with LLDP information to and from some of the Force10s in our DCs, I noticed a problem or "limitation" with the way that it was sending LLDP information to some of our other gear. I found that the system information was not being sent by default which is a security feature but I ...

Change Linux (Cumulus) IP address without losing connectivity

I was having some problems with cumulus, I needed to change an IP address of an interface without loosing connectivity, so I had to do the following: First you have to add a secondary IP address to the interface,  and confirm like so: ip addr add 192.168.1.10/24 dev eth0 ip addr show eth0 eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> ...

Juniper 4300 Portmap

Port Map of Juniper 4300, with port that are on the right start with ge-0/0/0 ports on the left start with xe-0/2/0 Basically this is to show that this device, just like most Junipers start with a 0 so the first port is ge-0/0/0 and so on.  

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