VMware virtual switch - does it run Spanning-Tree?

Answered Question
Jan 29th, 2008
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Can anyone tell me if the virtual switch in VMware generates BPDUs towards its external (real) ports? I don't think it can do, but I would like some confirmation.


I am trying to decide whether to enable bpduguard on switchports that connect to a VMware host. The links are dot1q trunks; the VMware virtual switch adds the 802.1Q tag according to the virtual machine it is hosting.


If the virtual switch does not generate BPDUs towards the external ports, then I am inclined to enable bpduguard, just to protect against any cabling accidents.


Kevin Dorrell

Luxembourg


Correct Answer by Collin Clark about 9 years 6 months ago

Spanning Tree Protocol Not Needed

VMware Infrastructure enforces a single-tier networking topology. In other words, there is no way to interconnect multiple virtual switches, thus the network cannot be configured

to introduce loops. As a result, Spanning Tree Protocol (STP) is not needed and is not present.


From http://www.vmware.com/files/pdf/virtual_networking_concepts.pdf


HTH

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Correct Answer
Collin Clark Tue, 01/29/2008 - 08:18
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Spanning Tree Protocol Not Needed

VMware Infrastructure enforces a single-tier networking topology. In other words, there is no way to interconnect multiple virtual switches, thus the network cannot be configured

to introduce loops. As a result, Spanning Tree Protocol (STP) is not needed and is not present.


From http://www.vmware.com/files/pdf/virtual_networking_concepts.pdf


HTH

Kevin Dorrell Tue, 01/29/2008 - 08:33
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Thank you. Exactly what I needed!


Kevin Dorrell

Luxembourg


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