Tag Archives: Switch


HP 2920 Switch – Reboot issue on firmware ver 15.18.0006 #vDM30in30

Updated 25.11.15

Firmware WB.15.18.0007 resolves the issue, see below

A colleague of mine found an issue with the latest HP 2920 switch firmware.
If you create VLANs using the CLI Menu, the switch reboots and the configuration is not saved.

We have reported this to HP, but is currently being treated as a non critical issue as when creating a VLAN via the web interface or native CLI, the issue doesn’t happen.

We have also noticed on this firmware the switch seems to be less responsive. Luckily we had a few units in stock that we could replicate this issue on, and can confirm downgrading to the previous firmware version removes the issue.

A quick cheers to my colleague Marco for finding and researching this issue.

The issue

Switch: HP 2920-48G-POE+

Primary Image    :    12852982 08/12/15 WB.15.18.0006

Software revision  : WB.15.18.0006

  1.        Go to the Main Menu
  2.        Select (2) Switch Configuration…
  3.        Select (8) VLAN Menu…
  4.        Select (3) VLAN Port Assignment
  5.        Select Edit
  6.        Modify the tagging mode for a port
  7.        Select Save
  8.        Switch reboots and doesn’t save configuration

Hopefully HP will release a fix for this firmware soon, as mentioned we have recreated this issue in production and test.

The Fix

The following information was provided by HP Support. Continue reading HP 2920 Switch – Reboot issue on firmware ver 15.18.0006 #vDM30in30


MAC’ing the move (Windows to OS X)

Bad Pun I know, but I’ve made the move from my works laptop running Windows 8.1 over to my personal MacBook Pro. The apple machine is  the last of the late 2011 model, and tbh I’ve hardly used it, so I purchased some RAM (4GB to 16GB) and an SSD (Samsung 850 Pro).

The upgrades were pretty easy, and I used SuperDuper to clone my machine to the smaller SSD. You can find a guide here.

After this, I decided to clone my works Laptop into a virtual machine, to use within VMware Fusion, unfortunately the built-in tools for Fusion didn’t seem to work, although it seems the Laptop (connected via ethernet directly to the MBP) it wouldn’t authenticate with either Local or Domain credentials. So I did the next best thing, used VMware Converter, cloned it to a USB hard drive, then imported it into Fusion.

Living with the change?

I’ve been reading Switching to the Mac: The Missing Manual, Yosemite Edition, to help me along with the switch and find those things I didn’t know existed. But as I mainly use the machine for work, I find myself googling for everything.

Getting on the LAN at work, wireless and wired seems to be fine so far, I don’t think I’ve suffered the Wifi issues others have done with Yosemite, however I only use Wifi at home at the moment.

The first thing I found I had to do was update to the latest Microsoft Remote Desktop application in the app store, otherwise you find issues connecting to Server 2012 machines due to the self signed certificate.

The keyboard seems to be causing me some issues as well, mainly due to the keyboard spacing, it’s not something I notice when typing, for example this post. However when doing things such as copy and paste using the keyboard shortcuts, I seem to catch the wrong keys. Eventually I’ll get this right, so no biggy. Being in the UK, the keyboard on the Macbook is its own variation of a UK layout, this seems to cause an issue when I’m using Fusion for my work ex-laptop VM, as the keyboard pass through is wrong.

The hash key annoys me, as there isn’t one on the board, its suppose to be option + 3 key, however I’ve changed a setting so it appears on shift + 3, however I keep forgetting its there!

Working with the change?

So the idea was to adapt this for work use, which I’ve kind of done, internally at work, we use office 365 and a custom-built portal, so that works fine in safari. I’ve also learnt how to use my USB to serial adapter within the built-in terminal application as well,

However I find myself using my virtual machine for everything, mainly this past two weeks, Visio, to complete customer documentation. And that for me is a bit of a concern, I’m not sure why I keep going back to my virtual machine, it’s just comfortable for things.

I am a big user of OneDrive for Business, of which there is a OS X beta version, but it is shocking and doesn’t work due a limit on character length, so the sync fails. Making it impossible for me access my documents and keep them backed up. Hopefully Microsoft will pull themselves together and get it sorted.

I’ve just started to use the Mail client for my outlook replacement, so we shall see about that. I do have the office 2011 suite installed, but coming from 2013, it’s a bit lack lustre, where as if I was coming from 2010, it would have been a big step up.

The whole way OS X has three locations in total, (Home, Documents, Downloads), and essentially wants you to dump your files, is bemusing to me. I know that’s not actually the case, but it feels like it to me. Just another thing to get use to.

Whats next?

I need to carry on using it for work, and figuring out why I need my Windows machine and which functions replace it on my Mac, interestingly enough I’m doing my first Cisco UCS deployment starting this week, and I will only really have my Mac to do it on, so this will force me to learn and like it.

Alternatively, I give in, move back to my Windows-based laptop, but I’m going to give it more time.





prod large photo0900aecd805744d4

Password Reset on Cisco MDS 9100 Series Fibre Channel Switch

My most recent customer engagement, was to re-use some older hardware as vSphere disaster recovery. The kit includes a EMC Clariion SAN, and two Cisco MDS 9124 switches.

The customer didn’t setup these FC switches, and required a password reset. Which I was happy to do for him, until I realised the Cisco article online is slightly wrong. So below are the steps I took to get the job done.

Password Reset/Recovery Steps

First off stick your console cable into the switch,

1. Power Cycle the Switch and keep pressing Ctrl + C until you see;


2. You then need to find the boot filename, using the “dir” command

loader> dir bootflash:

 12288 lost+found/
 18678784 m9100-s2ek9-kickstart-mz.4.1.3a.bin
 51055100 m9100-s2ek9-mz.4.1.3a.bin
 4798 mts.log

Continue reading Password Reset on Cisco MDS 9100 Series Fibre Channel Switch

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 Timers
  • EIGRP Troubleshooting
  • EIGRP Lab Topolopy

Continue reading Cisco CCNP Training – Bootcamp Roundup

Cisco CCNP Training Course – Day 7 – SWITCH

Lets Jump straight in…

Covered is

  • MST Config
  • Etherchannel
  • Spanning-Tree
  • BPDU Guard, Filter, Loop Guard, Root Guard, UDLD
  • Uplink Fast, Backbone Fast
  • HSRP
MST Config
(config)#spanning-tree mode mst
(config)#spanning-tree mst configuration
(config-mst)#name (value)
(config-mst)#revision (value)
(config-mst)#instance (value) vlan (value) (Eg. 1-3, 1,3,5 or 1-3,5,7)
(config-mst)#end (applies the configuration)
(config)#spanning-tree mst (instance No.) root (primary/secondary)

To see the configuration, whilst in spanning-tree mode mst; Continue reading Cisco CCNP Training Course – Day 7 – SWITCH