KVM bridge with Bonding on Ubuntu

I was running into a bunch of problems with KVM bridging and Ubuntu Bonding (LACP) but I was able to resolve this by using the following network config: Printout from /etc/network/interfaces LACP Bonding   # This file describes the network interfaces available on your system # and how to activate them. For more information, see ...

Minute MTR

Have you ever needed to run an MTR, (basically a traceroute) and save it to a file and then delete the files after a specified amount of time? I have had this need so I wrote this simple Ruby Script available on GITHUB. https://github.com/nertwork/minute_mtr You can just run this in any terminal after you have ...

Cumulus Linux U-Boot Errors

I kept on having problems booting one of my Cumulus Linux switches. Cumulus Linux U-Boot errors was the cause of the problem: Success: Found uboot-env mtd partition Failure: Unable to find sysroot2 partition... Spawning debug shell so you can have a look ... I have attached the files that we will move to the switch via ...

What is Software Defined Networking or SDN?

What is software Defined Networking: Wikipedia Says This I have found that all of the major players are bringing out products that qualify for a type of Software Defined Networking.  This is great because as Networking Administrators and Networking Engineers we can use controller based configuration in order to deploy networks faster and with more ease. ...

Error Device ae1 Not Found

I recently ran into a problem on an EX series switch - after already setting interfaces ae0 ae1 and ae2 up. Here was my configuration: [email protected]# show interfaces ae1 aggregated-ether-options { minimum-links 1; link-speed 10g; lacp { passive; periodic fast; } } unit 0 { description lab-mx1-ae1; family ethernet-switching { port-mode trunk; vlan { members ...

Problems after removing a node from a virtual chassis

After removing the EX-4500 from a virtual chassis configuration, I ran into a few problems within the config. I noticed something in the configuration that I thought was strange. [email protected]# set system commit factory-settings reset-virtual-chassis-configuration In order to get the node working properly after removing it from the cluster, I had to issue three commands. ...

Cisco Show Interfaces Rates

Cisco Interface Rates are typically buried inside of the show interfaces command output. However there are ways to filter in Cisco IOs and it is similar to the Linux CLI utility known as grep. Have you ever needed to show a specific port's rate - or show all ports at the same time? I know ...

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BGP Changes – how has this propagated?

Making BGP changes can be a daunting tasks and when there's an error during BGP changes the effects can be felt for an entire data-center over an extended period of time. As any Networking Engineer or Networking Administrator can tell you, it takes time for BGP to converge. It's not as quick as OSPF or ...

Open Source Networking Gear: Juniper’s Approach

DISCLAIMER: This is just my two-cents. Cisco has been opposed to open source whitebox networking from day one. There are many reasons for Cisco's stance on open source networking. I assume the largest roadblock here is that Cisco develops networking solutions and only shares partial functionality with the RFC. With EVPN usage on the rise ...

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Different JUNOS Modes

Getting used to the different modes is an essential part of learning JUNOS - I have learned the different Juniper JUNOS modes and they are included in this post. Root Login Prompt: lab-mx-1 (ttyu0) login: Shell Prompt: [email protected]% Enter the CLI (Command Line Interface): [email protected]% cli Operation mode within the CLI: [email protected]> Enter the Configuration ...

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