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why openstack use promiscuous mode for networking ?

asked 2017-03-21 03:33:17 -0600

omkar_telee gravatar image

What is the reason that OpenStack uses promiscuous mode of networking in provider network ?

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answered 2017-03-21 22:03:12 -0600

This is explained in the networking guide:

When a NIC receives an Ethernet frame, by default the NIC checks to see if the destination MAC address matches the address of the NIC (or the broadcast address), and the Ethernet frame is discarded if the MAC address does not match. For a compute host, this behavior is undesirable because the frame may be intended for one of the instances.

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Asked: 2017-03-21 03:33:17 -0600

Seen: 1,237 times

Last updated: Mar 21 '17