Tag Archives: NETWORK

Episode 16 – Vendors VARs Manufacturers

We returned to record our sixteenth episode on Sunday January 29, 2017.

Interesting News and Events

Roundtable Discussion – Vendors / Value Added Resellers / Manufacturers

  • How should you prepare yourself for a vendor meeting ?
  • What is the interest of the manufacturer ?
  • What is the interest of the value added reseller?
  • How to pick the right solution for your environment ?
  • Long Term relationship and support models
  • Why are Vendors trying to push you into a product or technology ?
  • Pursue a VAR that is interested in a long term relationship

What tools are you using?

Perl – I‘ve used Perl for the past 20+ years to help automate various small tasks and to help gather data for reporting purposes across a large number of devices (switches, routers, access points, etc)

You’ll find a few very detailed examples on the Perl Scripting section of my blog.


Episode 13 – Campus Network Design

We returned to record our thirteenth episode on Sunday October 2, 2016.

 Interesting News and Events

Roundtable Discussion – Campus Network Design

How to build a Campus Network

How many devices will be on the network ?

What kind of Devices do you need ?

  • Switches , Core (maybe distribution) Access
  • L3 Routing , classic Routers, L3 Switches, Firewalls
  • WLAN Access Points, Controller
  • Wan Optimizer
  • Infrastructure for VoIP
  • What tools are you using?

How to build a redundant campus network:

Layer 2

  • Spanning tree, Multi Chassis Link Aggregation , LAG/LACP
  • Stacking, like Cisco Cat 3k line, VSS technology  or Avaya Switches, Juniper virtual Chassis , HP IRF
  • virtual Switch Clustering , Cisco vPC, Avaya SMLT, Cisco VSS

Layer 3

First Hop redundancy Problem:

  • VRRP
  • HSRP

Choose the right technology for your needs / usecase.

Protect your Network:

  • Loop prevention   STP, BPDU Guard
  • DHCP Snooping
  • Rate Limiting
  • Access control

Use a seperate management network for your network devices.

Use encryption for management such as SSH, SNMPv3 and HTTPS

Preconfig / Templates / Provisioning:

  • Switches
  • Ports
  • VLANs

Out of Band Management

  • Opengear
  • Cradlepoint

What tools are you using?

I recently needed a small compact remote jumpbox that i could use to help isolate a problem I was experiencing in a physically remote network. I employed a Raspberry Pi 2 Model B with Anker USB 3.0 to RJ45 Gigabit Ethernet Adapter which allowed me to use the small computer as both a jumpbox and a remote packet capture solution. I was able to manage the computer remotely over the built-in Ethernet adapter and then used the Anker (it’s actually a Realtek chipset) Ethernet adapter to capture the problem frames coming from a SPAN port using tcpdump with some capture filters. You’ll need to be careful of how much traffic you throw at the little computer but I was really impressed with how well the solution worked.

What tools are you using?