This section outlines some known issues.

Cisco Switch Compatibility With 100 Series 

Energy Efficient Ethernet/Flow Control (Pause Frames) Compatibility Table

*This combination is included for completeness but in reality, it wouldn't be used as the PoE splitters only have 100Mbps throughput.

Current Bugs with Cisco Hardware

Catalyst 2960, 3560, 3750

Symptoms:

When using a Cisco 2960 with an incompatible configuration you will see severely degraded performance (lag and stuttering) as bandwidth throughput will be inconsistent. In some cases, you will even see constant line protocol flapping in the Cisco CLI as follows:

Workaround:

The root cause of this issue is that Vivi does not support Energy Efficient Ethernet that is enabled by default on these models of switches and due to a Cisco bug, it is not disabled for devices running at 100Mbps that do not support it as per the standards.

It can be disabled with this command in the Cisco CLI as follows:

CLI Command: 2960X(config-if)#no power efficient-ethernet

Further information can be found at the Cisco website: https://bst.cloudapps.cisco.com/bugsearch/bug/CSCus35889

Catalyst 9300 & 3850

Symptoms:

Multi-gig switches such as the 9300 & 3850 fail to auto-negotiate with Vivi resulting in no network connectivity.

Workaround:

Update the firmware for your Vivi Boxes to the latest version.

HP Audio Drivers

One of the most common support requests received by Vivi Support is the reporting of sound being in sync between the device you're presenting with and the Vivi Box.

This means that when you turn the volume up or down on your HP device, this also turns the volume up and down on the Vivi Receiver.

This issue tends to occur on HP devices only, and the underlying reason for this is that HP runs a Conexant driver that modifies sound differently for connected devices.

Usually when you modify your volume up, down or to mute, what you're actually doing is adjusting the sound via the WASAPI (Windows Audio Session API).

However, with the Conexant driver, this happens much further up the sound pipeline and therefore mutes any sound further down.

The way in which to fix this is to force the sound device to utilise WASAPI. HP recommends you do this by turning off hardware acceleration on the audio device.

See their support page for instructions: https://support.hp.com/us-en/document/c05851794

In some cases, this doesn't resolve the problem, as the particular sound driver installed has malfunctioning hardware acceleration.

In this scenario HP recommends you install one of their updated drivers to solve the issue. We only have a limited number of drivers, which have been kindly sent to us by schools who have experienced the issue.

If you do not see your device listed below you will need to contact HP directly, for the relevant driver. If you are able to send the driver to us we gratefully add it to our list.

See the following table for the relevant driver and download links:

Driver for 2015 models: https://downloads.vivi.io/support/2015.zip

Driver for 2016 models: https://downloads.vivi.io/support/2016.zip

Driver for 2017 and 2018 models: https://downloads.vivi.io/support/2017_2018.zip

Vivi App Disappearing from user devices. 

Symptoms

Vivi app will disappear from the user device. This often happens while the app is in use.

Cause

Some Antivirus software will identify Vivi as a threat and move the app to quarantine or delete it completely.

Workaround

We recommend adding Vivi to your AV whitelist to prevent this issue from reoccurring.