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5

Using QinQ (802.1ad) double tagging, you can use an inner (customer) VLAN ID and an outer (provider) VLAN ID. The point is that a provider can provide full, 802.1Q-tagged services to each client and still use the outer tag for their own VLAN infrastructure. Double tags can be used in plain frames or inside a (VPN) tunnel.


4

You could solve this by running VXLAN on the hypervisor using software like FRR. That would imply that you run a full mesh BGP setup between your hypervisors, or use route reflectors. Then, you can create as many VNI's between your hypervisors which can be used as VPC's between virtual machines. We've done this in a test setup and it seems to work, so we're ...


3

So you need to understand how a given switching device defines a flow. There's the obvious identifying stuff - the tuple of source and destination port/address, IP protocol number, etc. There's also clearly a beginning time and, of course, an end time. The beginning is pretty straightforward. It's the first point at which the identifying tuple is ...


2

Almost certainly 1 out of x packets. This is a common technique to reduce overhead for flow processing. A value of 1 means no sampling. If you use a higher value you need to make sure your collection / analysis tools are similarly configured to allow for proper interpolation.


2

The per-VLAN spanning tree concept (PVST, PVST+, RPVST+) is proprietary Cisco and only a few other vendors support it - OVS doesn't. The IEEE Multiple Spanning-Tree Protocol (MSTP) allows running multiple instances (each with its own spanning tree) which you can group your VLANs into. This isn't supported by OVS either. RSTP is supported but it's 'flat' in ...


2

Current documentation of OVS suggests that spanning tree is The Open vSwitch implementation of STP is not well tested. And documentation does not make any reference to the known protocols hat support multiple spanning tree instances such as MST (802.1s) or the Cisco proprietary PVST, PVST+ or Rapid-PVST+ However, there seems to be support for Rapid-...


1

I figured it my self. I have used spanning tree module along with l2_learning from openflow which allowed me to ping other hosts successfully. Below is the command to be execute in pox directory. ./pox.py topoDiscovery forwarding.l2_learning openflow.discovery --eat-early-packets --link_timeout=50 openflow.spanning_tree log.color log --format="[%(asctime)...


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