Re: Using STP in kvm bridges

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On 09/16/2015 10:15 AM, Dmitry E. Mikhailov wrote:
On 09/16/2015 03:02 PM, C.L. Martinez wrote:
  What advantages and disadvantages have??  If I will want to install
some kvm guests that use multicast address for certain services, is it
recommended to enable STP?
STP has nothing to do with multicast as it's an Ethernet protocol.
It's developed to provide loop-free redundancy links to Ethernet-based
networks.

I can't imagine any legitimate use of STP within virtualized environment
except when BOTH a) you don't trust the person who manages VM's (like in
VPS providing) AND b) you provide more then one network interface to the
virtual machine.

Otherwise STP can be used to prevent traffic storm because of malicious
bridging of vNIC's inside VM.

Best regards,
     Dmitry Mikhailov

Thanks Dmitry... Uhmm, but my case is: "b) you provide more then one network interface to the virtual machine". I have several kvm guests with 3 or more network interfaces ... In this case, do you recommends to enable STP??



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