1. Compute Aggregate 1 must advertise this link. We omit the physical port on the switch to which the node is directly connected. Network Aggregate Links Between Aggregates Node 1 AM Node 2 Compute Aggregate 1 Switch Local DS Node 3 Local DS Only dataplane links are reported, i.e., links that are part of an experiment and thus can carry experiment traffic. Endpoints of such links are not usually reachable from the arbitrary places on the Internet, in contrast to the control plane. Compute Aggregate 2 Switch Both the compute AM and the network AM advertise this link. Each side must know the exact URN of the interface and interface-vlan of the other side. = endpoint of a link represented by an interfacevlan, which must then reference a valid interface. The vlan must be the same on both sides of a link. Both interface and interfacevlan are needed because most switches can supply more statistics for interfaces than for interfacevlans, but a link is really the combination of an interface and a vlan. Without the vlan, you would not be able to trace where the link goes. Interface on the node (may be a VM) If there are transit networks on this path that do not run GENI monitoring, they are either omitted or expressed as an L2 (layer 2) path. Transit networks that do run GENI monitoring will appear as link endpoints. egress interface from rack to the outside world. Ingress/egress are from the point of view of traffic going from Compute Aggregate 1 to 2. egress interface from the network aggregate The network AM advertises this link. It is strongly encouraged to include an L2path giving the details of the path between the ingress and egress interfaces. This switch connects the rack to the outside world. Rack AMs such as this compute AM must advertise this switch as a node so that we have a place to put its interfaces and interface-vlans. ingress interface into the network aggregate

2. Multiple Links to the Compute Aggregate Network Aggregate 1 Local DS Compute Aggregate 2 Switch All links to destinations outside of the rack should be represented. Network Aggregate 2 Local DS Compute Aggregate 3 Switch CA1 is still expected to advertise this link, even though there is no reciprocal advertisement from the campus side. CA1 must create a URN representing the interface and interfacevlan for the campus endpoint, since these are required to represent the link. Campus Network not running GENI monitoring Node 1 AM Node 2 Compute Aggregate 1 (CA1) Switch Local DS Node 3 CA1 must advertise these links. We omit the physical ports on the switch to which the nodes are directly connected. Switch Network Aggregate 3 Local DS Link Interface-VLAN

3. Links Internal to a Rack Node 1 AM Node 2 Compute Aggregate Virtual Switch Switch Local DS Node 3 Interface-VLAN Link Interface on this node There is no need for a dummy node to represent these switches because they do not terminate one of the link endpoints. Compute AM optionally advertises this link Representing these rack-internal links is optional. GENI network operators will probably not delve into the innards of a rack to diagnose a problem. Rack admins, however, may find these links useful. Nodes and their associated slivers must be advertised, though. This also applies to the previous slides.