jump to navigation

Network Health Check in vSphere 5.1 February 19, 2013

Posted by vbry21 in VMware blogs.

I’ve been playing with the new features of the Distributed Virtual Switches in vSphere 5.1 lately as part of my prep for the vSphere 5.1 Optimise and Scale course.

One of the new features is a marvellous thing called Network Health Check

The purpose of this feature is to detect certain issues and inconsistencies between the physical and virtual networks.

Certain key parameters such as MTU, NIC Teaming configuration and VLANs need to be configured consistently on the virtual and physical networks. If not we could than get some rather dramatic network connectivity issues.

What Network Health Check does is to search for these inconsistencies and report them to the administrator.

Network Health Check can detect and report the configuration differences between the port group and the switch port configuration by using layer two Ethernet packets. At one-minute intervals (by default), request and acknowledge packets are sent back and forth between the virtual interface and the switch. When packets are dropped, a configuration warning is displayed on the VMware vSphere® Web Client.

The requirements for Network Health Check include:

For VLAN and MTU checks, there must be at least two physical uplinks connected to the distributed virtual switch.

For the teaming policy check, there must be at least two active uplinks in the team and at least two ESXi hosts connected to the virtual distributed switch.

For a wonderful little demo visit the VMware Knowledge Base




No comments yet — be the first.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )


Connecting to %s

%d bloggers like this: