Network Virtualization using Extreme Fabric Connect

Network Virtualization Using Extreme Fabric Connect
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UNIs and Switched UNIs to the same I-SID, in which case the user-VLAN that constitutes the CVLAN UNI
will be bridged together with the Switched UNIs. This is also possible on the same local BEB.
Note
Switched-UNI is in fact what is being used with Fabric Attach by the FA Server BEB and is
also the only available UNI type on a DVR leaf node.
Figure 31 Switched UNI
Tip
Extreme VSP platforms also allow Switched-UNI bindings to be defined specifically for
untagged traffic. In this case, there is a BPDU configurable switch that will determine
whether or not Spanning Tree BPDUs will be transported into the L2 VSN.
E-LINE / L2 VSNs with Transparent UNI
Delivering point-to-point (E-LINE) L2 tunnels over SPB is just a special case of an L2 VSN that was defined
with only two end-points. This is most commonly done in conjunction with a Transparent UNI type that is
able to associate the L2 VSN with all traffic received on a raw Ethernet port. Whatever traffic is received on
that port, with or without a q-tag, and even if the traffic belongs to a signalling protocol using link-local
PDUs (e.g., Spanning Tree BPDUs, LACP, LLDP), this traffic will be tunnelled across the SPB fabric.
Tip
Only Ethernet Flow Control Pause frames cannot be transported across the L2 VSN with
Transparent UNIs.
Tip
Transparent UNIs are also capable of performing VSN MAC learning, so they can also be
used for E-LAN type L2 VSNs where three or more Transparent UNIs are assigned to the
same I-SID.