At a customer site we received several notifications of performance issues with a VMware VI3 environment. After having checked the configuration of the VMs and the Hosts we decided to dive into esxtop. At first sight we did not see any abnormalities. Low %RDY, which is usually the first thing I check, some swapping but [...]
Posts Tagged ‘networking’
getvSwitchMacTable.pl
December 4th, 2009
No Comments
I’ve been following William Lam’s VMTN account in my RSS reader for a while as William regularly releases useful scripts. Lately he has been pumping iron and releasing new scripts or new versions of scripts on an almost daily basis. One of the most useful scripts that William released lately is “getvSwitchMacTable.pl”. Make sure to [...]
Active / Standby etherchannels?
October 12th, 2009
14 Comments
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 [...]
dvSwitch?
September 24th, 2009
9 Comments
I receive the same question around dvSwitches almost every week; should I only use dvSwitches or go for a hybrid model? The whitepaper that has been released a couple of months ago clearly states that a hybrid model is a supported configuration but would I recommend it? Or would a pure vDS model make more [...]
Whitepaper: VMware vNetwork Distributed Switch
July 22nd, 2009
4 Comments
I just noticed this great whitepaper on the Distributed Switch(vDS) and thought it might also be useful for you guys:
http://vmware.com/files/pdf/vsphere-vnetwork-ds-migration-configuration-wp.pdf
This guide is intended to help users understand the various scenarios and considerations for migration to the vNetwork Distributed Switch (vDS). It also includes a step-by-step guide on migration from a Standard Switch environment to a [...]
How to show load balancing policy in the COS?
June 5th, 2009
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Kelly Olivier had a good question on the VMTN Communities. How can I check from the Service Console which network load balancing I’m using? Of course his first bet was “vmware-vim-vmd” but unfortunately there doesn’t seem to be an option to show which load balancing policy is being used.
As far as I know there’s another [...]
Ken’s view on Service Console redundancy and my take…
April 9th, 2009
6 Comments
I’ve read Ken’s article on Service Console redundancy a couple of times, When is it OK to default on your VI? As I also wrote on the VMTN Blog I really love Ken’s posts so far. They are in depth and Ken knows what he is talking about. His argument, keep it simple, make sense.
Basically, what [...]
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