Data center network architectures that can reduce the cost and complexity of data center networks. The data center network architectures can employ optical network topologies and optical nodes to efficiently allocate bandwidth within the data center networks, while reducing the physical interconnectivity requirements of the data center networks. The data center network architectures also allow computing resources within data center networks to be controlled and provisioned based at least in part on a combined network topology and application component topology, thereby enhancing overall application program performance.

Systems and methods of affinity modeling in data center networks that allow bandwidth to be efficiently allocated with the data center networks, while reducing the physical interconnectivity requirements of the data center networks. Such systems and methods of affinity modeling in data center networks further allow computing resources within the data center networks to be controlled and provisioned based at least in part on the network topology and an application component topology, thereby enhancing overall application program performance.

Systems and methods of affinity modeling in data center networks that allow bandwidth to be efficiently allocated within the data center networks, while reducing the physical interconnectivity requirements of the data center networks. Such systems and methods of affinity modeling in data center networks further allow computing resources within the data center networks to be controlled and provisioned based at least in part on the network topology and an application component topology, thereby enhancing overall application program performance. Using an affinity topology describing requirements for communications between applications and a network topology, network nodes are configured to satisfy multicast dispersion and latency requirements associated with communications between applications.

A telephony equipment migration arrangement is provided. The telephony equipment migration arrangement includes legacy telephony equipment located in one or more equipment bays, at least one transport cable, with one or more connectors, to provide external carrier connectivity, replacement telephony equipment located in one or more equipment bays remote from the legacy telephony equipment, and at least one remote coupling cable, with one or more connectors, connected to the replacement telephony equipment. The connector(s) of the remote coupling cable are mounted in a location having a predetermined locational relationship with the equipment bay in which the legacy telephony equipment is located, and the transport cable is communicatively coupled to the remote coupling cable.