Category Archives: Networking

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Back to the Future – Configure ESX 4.0 iSCSI Multipathing

So I’m in the middle of an upgrade of environment that has;

  • 2 x Hosts on ESX 4.0
  • SAN using SAS connections to Hosts
  • No resources available for failover and testing
  • Limited network ports

I’m installing;

  • 3 x Hosts on ESXi 5.5
  • Nimble SAN – iSCSI

So to move all the virtual machines from the SAS SAN to the Nimble, I need to move the VM’s whilst turned on,

I’ve setup the iSCSI networking on the ESX host,

  • Creating VMKernal ports with IP addresses,
  • Mapping a VMNIC to each VMKernel directly
  • Setting MTU size to 9000

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Continue reading Back to the Future – Configure ESX 4.0 iSCSI Multipathing

vmwarevss

Using PowerCLI to create Virtual Machine Port Groups

So basically I had a host failure where all of the configure was lost, if I was more savvy with Powershell/PowerCLI, I would have been able to rebuild it all via scripts, but that clones the settings from a working host.

But nevermind that is for a different day of learning.

So I configured the host to the point of Networking, so the vSwitches had the correct NICs, but I needed to do all the port groups, which in the GUI if you have a few to do is time consuming.

So in PowereCLI, pull all of your information, port-group names and VLAN IDs.

Get-Vmhost -name <FQDN of host> | Get-VirtualSwitch -name  | Get-VirtualPortGroup

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To create a port-group

Get-Vmhost -name <FQDN of host> | Get-VirtualSwitch -Name  | New-VirtualPortgroup -Name "Name of PG" -VlanID
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Obviously this is a very short crude method of achieving what I need, but here you can see the basic building blocks needed to create Port Group in PowerCLI.
Regards

Dean


2014 11 05 21 43 35

How to produce good documentation – Part 2 – Rack and Server Diagrams

Oh no, diagrams! But, but, I’m not creative!

So we covered the foundation an environment in part 1, which is that hated word, which is documentation,

But that means you need diagrams, which is something most people struggle with, especially using Visio.

You’re not alone, I was the same, my documentation in my early days was shocking, and then I took on a consultancy role, where I was implementing solutions and having to produce documentation for customer. I had a steep learning curve.

So I’m going to take you into the first steps on how to diagram your Racks and the servers in them.

Visio and your stencils

So your going to need Visio, preferably 2013, but 2010 will be fine. And you need stencils of the hardware you’re creating a diagram of.

The best place to get 90% of your Visio Stencils is VisioCafe.

For others that do not appear on there, its easy enough to just google the vendor name plus Visio ;).

Here’s the file for the Visio diagrams.

Creating a diagram of your rack

So this is something I do for most of my customers, creating a diagram of the rack, mainly to show the bits I’ve stuck in, and so the customer knows which server is which, and then can refer to the rest of the document for what that bit of kit does.

2014-11-05_19-52-45 Continue reading How to produce good documentation – Part 2 – Rack and Server Diagrams

CCNP SWITCH

Cisco CCNP 624-813 Switch Exam Experience

ccnp-switch-642-813

So I took and passed my CCNP Switch Exam on Monday morning. 934 out of 1000.

I’ve been meaning to do my CCNP for the past two and a half years, since I passed my CCNA, which doesn’t expire until April 2015, but will be renewed now due to the pass on switch exam.

As you may know, the current 642 CCNP series exams will be retired on 29th January, so I chose this as my hard deadline to pass the exam.

The training resources I used were

You can find my revision notes here.

Exam Experience

Continue reading Cisco CCNP 624-813 Switch Exam Experience

cisco ccnp

Cisco CCNP Training – Bootcamp Roundup

So this post is mainly a big round-up of the day by day posts I made of my CCNP bootcamp notes.

Here is a list by topics covered each day to make it easier for you to jump into.

There is no TSHOOT posts at the moment, as the idea of TSHOOT is covered in ROUTE and SWITCH, however I will post something to do with troubleshooting in the future.

The training resources I used were

For my fancy Visio Diagrams, please find them on dropbox here. (I only ask that credit is given where used, as these were created by myself.) Examples below;

Policy-Based RoutingBGP Topologies - Full mesh - MPLSGateway Load Balacing Protocol

Cisco CCNP Training Course – Day 1 – ROUTE
  • EIGRP
  • EIGRP Timers
  • EIGRP Troubleshooting
  • EIGRP Lab Topolopy

Continue reading Cisco CCNP Training – Bootcamp Roundup