18 octobre 2009

Active / Standby etherchannels?

I’ve seen this a couple of times already and just had a very long phone call with a customer who created the following set up: So basically the first two nics are active with load balancing set to IP-Hash and configured as an Etherchannel on the stacked Cisco 3750’s. The second pair are “standby”. Also with load balancing set to IP-Hash and configured as a second Etherchannel on the stacked Cisco 3750’s. A diagram probably makes more sense: Explanation: All NICs belong to the same vSwitch. Etherchannel 01 consist of “vmnic0″... [Lire la suite]
Posté par jcdemarque à 22:17 - - Permalien [#]
Tags : , , , , ,

18 octobre 2009

Best Practices: running vCenter virtual (vSphere)

Yesterday we had a discussion on running vCenter virtual on one of the internal mailinglists. One of the gaps identified was the lack of a best practices document. Although there are multiple for VI3 and there are some KB articles these do need seem to be easy to find or complete. This is one of the reasons I wrote this article. Keep in mind that these are my recommendations and they do not necessarily align with VMware’s recommendations or requirements. Sizing Sizing is one of the most difficult parts in my opinion. As of... [Lire la suite]
Posté par jcdemarque à 22:16 - - Permalien [#]
Tags : , , , , ,
18 octobre 2009

Hyper-V Hotfix for "0x00000101 - CLOCK_WATCHDOG_TIMEOUT" on Nehalem systems

We have just released a new hotfix for Windows Server 2008 R2 that address the issue that users were getting a bluescreen of death on Intel Xeon 5500 series processor-based computers with the following text:0x00000101 (parameter1, 0000000000000000, parameter3, 000000000000000c) CLOCK_WATCHDOG_TIMEOUTYou can download the hotfix from here: http://support.microsoft.com/kb/975530 For the curious, this issue is actually caused by a bug (or in Intel terms “erratum”) that causes these processors to generate spurious interrupts.  You... [Lire la suite]
Posté par jcdemarque à 22:10 - - Permalien [#]
Tags : , , , , , , , , ,
18 octobre 2009

Hotfix needed to move R2 differencing disk to Windows Server 2008

A virtualization MVP recently bought this to my attention: In Windows Server 2008 R2 there was a minor change to the format of differencing virtual hard disks.  As a result you will need to apply an update to Windows Server 2008 if you want to move differencing disks from Windows Server 2008 R2 to Windows Server 2008. You can download this update from here: http://support.microsoft.com/kb/971677 Note that this applies to Windows Server 2008 and Windows Server 2008 SP2 (not to Windows Server 2008 R2).  If you do... [Lire la suite]
Posté par jcdemarque à 22:09 - - Permalien [#]
Tags : , ,
18 octobre 2009

Sécurité informatique : les dix commandements de la CNIL

La Commission nationale de l'informatique et des libertés publie une série de dix conseils afin de sécuriser un système d'information. Toujours autant attachée à la protection de la vie privée, la CNIL a mis en ligne cette semaine dix conseils pour une première approche de la sécurité des systèmes d'information, et donc de la sécurité des données.Ces dix conseils pourront sensiblement énerver les responsables informatiques et autres DSI qui y verront une forme de rabâchage, mais ils ont été établis en fonction des différentes... [Lire la suite]
Posté par jcdemarque à 18:05 - - Permalien [#]
Tags : , , , , ,