Author Archives: Humair

Cumulus Linux on Dell Switches: Spine-Leaf Architecture & OSPF on Unnumbered Interfaces

Posted on January 18, 2015 by Humair

In a prior blog, Cumulus Linux on Dell Networking Switches, I demonstrated how to install Cumulus Linux on a Dell S6000 switch and do some basic configuration. In this blog, I’ll demonstrate how to configure routing on Dell switches running … Continue reading →

Mac OS X: Java – “Application Blocked by Security Settings” Solution

Posted on December 24, 2014 by Humair

Starting with Java 8 Update 20 (Java 8u20) and later versions the option to lower the security setting in the Java Console Panel to Medium has been removed. Prior, changing the setting to Medium would quickly resolve issues where certain … Continue reading →

Posted in HTML, Java, Mac OS X Yosemite, Programming Languages, Web Development | Tagged Apple Java security warning, apple mac java applet, apple mac java fix, Apple Mac OS X Yosemite, Apple OS X Yosemite, Application Blocked by Security Settings, how to write java applet, html applet code, Java 8, Java 8 Console, Java 8 Update 20, java applet html code, java applet tag, Java Applets, Java Application Blocked by Security Settings, java htm applet tag, Java security, Java security warning, Mac Java, Mac Java 8, Mac Java 8 Applet, Mac Java 8 Console, Mac Java 8 fix, Mac Java 8 issue, Mac Java 8 Problem, Mac Java 8 security setting, Mac Java Applet, Mac Java Fix, Mac Java Plugin, Mac Java security seting, Mac Java security warning, Mac no medium Java security, Mac OS X, Mac OS X Yosemite, Mac Yosemite, Yosemite | 3 Comments

Dell VRF-lite & VMware NSX: Multitenancy Across Physical & Logical Networks

Posted on December 20, 2014 by Humair

Please checkout the white paper Dell Networking: Multitenancy Across Physical and Logical Environments with VRF-lite and VMware NSX. In the white paper I discuss use cases and how NVO and VRF-lite can be used together to deploy a consistent multitenant … Continue reading →

Posted in Dell, Dell Force10, Labs, Network Architecture, Networking, Protocols, Virtualization and Cloud Computing, VMware, VMware | Tagged Dell, Dell Networking, Dell Networking Switches, Dell S4810, Dell S6000, Dell VMware, Dell VMware NSX, Dell VMware NSX 6, Dell VMware NSX 6.0, Dell VMware NSX 6.1, Dell VMware NSX-v, Dell VMware NSX-v 6, Dell VMware NSX-v 6.0, Dell VMware NSX-v 6.1, Dell VMware NSX-vSphere, Dell VMware NSX-vSphere 6, Dell VMware NSX-vSphere 6.0, Dell VMware NSX-vSphere 6.1, Dell VRF, Dell VRF-lite, Dell VRF-lite configuration, Distributed Logical Router, DLR, DLR Control VM, Edge VLAN, ESXi 5.5, multitenancy, Multitenancy Across Physical and Logical, Multitenancy Across Physical and Logical Environments, Multitenancy Across Physical and Logical Networks, multitenant, multitenant framework, Network Virtualization, NSX 6, NSX 6.0, NSX 6.1, NSX L2 Gateway, NSX-V, NSX-vSphere, NVO, NVO and VRF-lite, overlapping IP addresses, overlapping IPs, PE, Perimeter Edge, S4810, S6000, SDN, software defined networking, tenant, tenant VRF, tenant workloads, VDS, virtual appliance, virtual appliances, virtual distributed switch, virtual router, virtualization, vlan, vmware, VMware Distributed Logical Router, VMware DLR, VMware DLR Control VM, VMware Edge Services Router, VMware ESR, VMWare ESX, VMware ESXi, VMware ESXi 5.5, VMware NSX, VMware NSX 6, VMware NSX 6.0, VMware NSX 6.1, VMware NSX L2 Gateway, VMware NVO, VMware PE, VMware Perimeter Edge, VMware VDS, VMware virtual appliance, VMware virtual appliances, VMware Virtual Distributed Switch, VMware vSphere, VMware vSphere 5.5, VNI, VR, VRF, VRF-lite, VRF-lite configuration, VXLAN, VXLAN Network Identifier | 1 Comment

Firewalling & Micro-segmentation with VMware NSX

Posted on December 8, 2014 by Humair

One very exciting and strong use case for VMware NSX is advanced security. VMware NSX has some inherent security features and also allows for 3rd party security appliance integration. In this blog, I’ll briefly discuss the firewalling and micro-segmentation capabilities … Continue reading →

Posted in Dell, Dell Force10, Labs, Network Architecture, Network Security, Networking, Virtualization and Cloud Computing, VMware | Tagged centralized firewall, Dell, Dell Networking, Dell Networking S4810, Dell Networking S4810 switch, Dell Networking S6000, Dell Networking S6000 switch, Dell S4810 switch, Dell S6000, Dell S6000 switch, Dell VMware NSX, DFW, DFW logging, distributed firewall, Distributed Firewall logging, east-west traffic, Edge Services Gateway, ESG, ESXi, ESXi hypervisor, firewall, firewall logging, firewall virtual appliance, firewall virtual appliances, micro-segmentation, Micro-segmentation with VMware NSX, microsegmentation, microsegmentation with VMware NSX, network segmentation, North-South traffic, NSX DFW, NSX DFW logging, NSX Distributed Firewall logging, NSX Edge Services Gateway, NSX ESG, NSX Security Groups, NSX-V, NSX-vSphere, One-Arm Firewall, perimeter-centric, perimeter-centric security, RBAC, Role Based Access Control, S4810 switch, S6000, S6000 switch, SDDC, security, security appliance, Security Groups, Security Tag, segmentation, Software Defined Data Center, traditional firewall, traffic tromboning, vCenter, VM Name, vmware, VMware DFW, VMware Distributed Firewall, VMware ESXi, VMware ESXi hypervisor, VMware NSX, VMware NSX DFW, VMware NSX DFW logging, VMware NSX Distributed Firewall, VMware NSX Distributed Firewall logging, VMware NSX Edge Services Gateway, VMware NSX ESG, VMware NSX firewall logging, VMware NSX-V, VMware NSX-vSphere, VMware vCenter | 4 Comments

Cumulus Linux on Dell Networking Switches

Posted on November 16, 2014 by Humair

It’s pretty cool that Dell allows its customers to install other network switch OSes on their networking switches; it’s the only major networking hardware vendor in the industry that allows for this. Other networking hardware vendors tie their proprietary network … Continue reading →

Dell Networking and VMware NSX: Bridging Between Logical & Physical Networks

Posted on November 5, 2014 by Humair

In a prior blog, Creating Logical Networks and Services with VMware NSX on Dell Infrastructure, I discussed how easily VMs can be moved from physical (VLANs) to logical networks (Network Virtualization Overlays or NVOs). In practicality, there will almost always … Continue reading →

Posted in Dell, Dell Force10, Labs, Network Architecture, Networking, Protocols, Technology, Virtualization and Cloud Computing, VMware, VMware | Tagged CLI, decouple network, decoupled, Dell, Dell NSX Reference Architecture, Dell PowerEdge, Dell PowerEdge Rack Server, Dell PowerEdge Server, Dell S6000, Dell Server, Dell-VMware NSX Reference Architecture, Dell-VMware NSX solution, Distributed Logical Router, Distributed Logical Router Control VM, DLR, DLR Control VM, Hardware NSX L2 Bridge, Hardware VTEP, Logical Network, logical network services, Logical Networks, logical router CLI, logical switch, logical switch CLI, logical switches, Logical-Physical Bridge, network services, NSX, NSX bridge, NSX CLI, NSX design/deployment, NSX Distributed Logical Router, NSX Edge, NSX Edge Appliance, NSX Edge Appliances, NSX Hardware L2 Bridge, NSX L2 Bridge, NSX Manager, NSX Manager virtual appliance, NSX Perimeter Edge, NSX Perimeter Edge CLI, NSX Perimeter Edge Router CLI, NSX Router CLI, NSX Services Gateway, NSX vCenter plugin, NSX-vSphere, NSX-vSphere design/deployment, NSX-vSphere plugin, NSX-vSphere vCenter plugin, NVI VLAN Bridge, Perimeter Edge, Physical-Logical Bridge, PowerEdge server, Rack Server, router CLI, S6000, SDN, SDN solution, SDN solution with NSX, software defined networking, switch CLI, vCenter, Virtual Extensible LAN, virtual machine, vlan, VLAN VXLAN bridge, VM, vmware, VMware NSX, VMware NSX design/deployment, VMware NSX Manager, VMware NSX Manager virtual appliance, VMware NSX Reference Architecture, VMware NSX-vSphere, VMware NSX-vSphere design/deployment, VMware vCenter, VMware vSphere, VNI-VLAN Bridge, vSphere, vSphere Web Client, VTEP, VXLAN, VXLAN encapsulation, VXLAN header, VXLAN-VLAN Bridge | Leave a comment

Customize the Mac Terminal Shell Prompt in OS X Yosemite

Posted on November 3, 2014 by Humair

The Mac prompt is defined by the ‘PS1’ environment variable which can be defined in the ‘.bash_profile’ hidden file. To customize your Mac Terminal Shell Prompt in OS X Yosemite, follow the below steps.

Posted in Mac OS X Yosemite, Operating Systems, Technology | Tagged .bash_profile, Apple Mac OS X Yosemite, Apple MacBook Pro, Apple OS X Yosemite, BASH, BASH Shell, change Mac prompt, Change Mac shell prompt, change shell prompt, change Yosemite prompt, change Yosemite shell prompt, custom Mac shell, custom Mac shell prompt, custom terminal prompt, Customize Mac terminal shell prompt in OS X Yosemite, customize the Mac terminal shell prompt in OS X Yosemite, export PS1, MAC, Mac OS, Mac OS 10.10, Mac OS X, Mac OS X 10.10, Mac OS X Yosemite, MacBook Pro, OS X, OS X Yosemite, PS1, shell prompt, terminal prompt, terminal window, vi, vi editor, Yosemite | Leave a comment

Multitenancy on Dell Networking Switches via VRF-lite

Posted on October 29, 2014 by Humair

Check out the Dell Networking: Multitenancy with VRF-lite white paper. I describe in detail how multitenency can be achieved on supported Dell Networking switches via Virtual Routing and Forwarding (VRF). VRF-lite supports multitenancy by allowing multiple different routing tables within … Continue reading →

Posted in Dell, Dell Force10, Labs, Network Architecture, Networking, Protocols, Technology, Virtualization and Cloud Computing, VMware, VMware | Tagged default VRF, Dell, Dell Networking, Dell Networking S6000, Dell Networking: Multitenancy with VRF-lite, Dell Networking: Multitenancy with VRF-lite white paper, isolated network, isolated networks, leak, leak route, leaking, leaking route, multitenancy, Multitenancy with VRF-lite, multitenant network, Network Virtualization, Network Virtualization Overlay, Network Virtualization Overlays, non-default VRF, NSX, NSX network virtualization, NVO, NVOs, overlapping IP addresses, route, route leak, route leaking, routing table, routing tables, S6000, tenant, virtual router, virtual routers, Virtual Routing, Virtual Routing and Forwarding, vlans, vmware, VMware NSX, VMware NSX network virtualization, VR, VRF, VRF instance, VRF-lite, VRs, VXLAN, VXLAN Network, white paper | Leave a comment

Creating Logical Networks and Services with VMware NSX on Dell Infrastructure

Posted on October 16, 2014 by Humair

If you haven’t already, please checkout the Dell-VMware NSX Reference Architecture (RA) whitepaper. In the reference architecture I explain in detail the foundational NSX-vSphere components and also how Dell can provide a complete end-to-end infrastructure (servers, networking, storage) to support … Continue reading →

Posted in Dell, Dell Force10, Labs, Network Architecture, Networking, Virtualization and Cloud Computing, VMware, VMware | Tagged Blade, Blade Server, blade switch, CLI, decouple network, decoupled, Dell, Dell EqualLogic, Dell EqualLogic Array, Dell EqualLogic PS 6210XS, Dell EqualLogic PS6210XS, Dell EqualLogic storage, Dell EqualLogic Storage Array, Dell MXL, Dell MXL Blade Switch, Dell NSX Reference Architecture, Dell PowerEdge, Dell PowerEdge Blade Server, Dell PowerEdge Rack Server, Dell PowerEdge Server, Dell S4810, Dell S6000, Dell Server, Dell-VMware NSX Reference Architecture, Dell-VMware NSX solution, Distributed Logical Router, Distributed Logical Router Control VM, DLR, DLR Control VM, EqualLogic, EqualLogic array, EqualLogic PS 6210XS, EqualLogic PS6210XS, EqualLogic storage, EqualLogic Storage Array, Hardware NSX L2 Bridge, Hardware VTEP, Logical Network, logical network services, Logical Networks, logical router CLI, logical switch, logical switch CLI, logical switches, Logical-Physical Bridge, MXL, MXL blade, network services, NSX, NSX bridge, NSX CLI, NSX design/deployment, NSX Distributed Logical Router, NSX Edge, NSX Edge Appliance, NSX Edge Appliances, NSX Hardware L2 Bridge, NSX L2 Bridge, NSX Manager, NSX Manager virtual appliance, NSX Perimeter Edge, NSX Perimeter Edge CLI, NSX Perimeter Edge Router CLI, NSX Router CLI, NSX Services Gateway, NSX vCenter plugin, NSX-vSphere, NSX-vSphere design/deployment, NSX-vSphere plugin, NSX-vSphere vCenter plugin, NVI VLAN Bridge, Perimeter Edge, Physical-Logical Bridge, PowerEdge Blade Server, PowerEdge server, Rack Server, router CLI, S4810, S6000, SDN, SDN solution, SDN solution with NSX, software defined networking, Storage Array, switch CLI, vCenter, Virtual Extensible LAN, virtual machine, vlan, VLAN VXLAN bridge, VM, vmware, VMware NSX, VMware NSX design/deployment, VMware NSX Manager, VMware NSX Manager virtual appliance, VMware NSX Reference Architecture, VMware NSX-vSphere, VMware NSX-vSphere design/deployment, VMware vCenter, VMware vSphere, VNI-VLAN Bridge, vSphere, vSphere Web Client, VTEP, VXLAN, VXLAN encapsulation, VXLAN header, VXLAN-VLAN Bridge | 1 Comment

BASH Shell Scripting: Passing Arguments to a Python Script

Posted on September 1, 2014 by Humair

Larry Wall: “Shell programming is a 1950s juke box …” In this short blog I write a small Python utility script to create directories and demonstrate how to utilize it and pass it arguments via BASH shell script. The functionality … Continue reading →

Posted in BASH Shell Scripting, Mac OS X Mavericks, Operating Systems, Programming Languages, Python, Technology | Tagged BASH, BASH pass argument, BASH pass argument to command, BASH pass argument to python script, BASH pass argument to script, BASH Shell, Bash Shell Scripting, linux, MAC, Mac OS X, Mac OS X Mavericks, Mavericks, mkdir, OS X Mavericks, Python, Python 3, Python pass argument, Python pass arguments, python3, scripting, shell, shell script, shell scripting, Unix | 1 Comment