Abstract: A method in an example embodiment can include polling a first cable modem in a cable network and receiving a first response message from the first cable modem identifying a downstream frequency detected by the first cable modem. The method further includes determining the downstream frequency is split between at least two fiber nodes and determining a cable modem termination system (CMTS) service group topology, where the topology includes the at least two fiber nodes. In specific embodiments, determining that the downstream frequency is split is based on at least the first response message from the first cable modem and a second response message from a second cable modem. In more specific embodiments, the method includes constructing a hybrid fiber-coaxial (HFC) topology map of the cable network based on at least the first and second response messages, where the HFC topology map indicates the CMTS service group topology.

Abstract: In one embodiment, label distribution sessions are established between a Modular Cable Modem Termination System (M-CMTS) core and one or more remote PHYs. The label distribution sessions facilitate association of labels with either Radio Frequency (RF) channels or groups of the RF channels that extend from the remote PHYs to one or more cable modems. The labels are then used to facilitate communications between the M-CMTS core and the remote PHYs over a MultiProtocol Label Switching (MPLS) network.

Abstract: In one example, an Edge Quadrature Amplitude Modulation (EQAM) communicates EQAM information to a Modular Cable Modem Termination System (M-CMTS) core using a routing protocol that is configured on a packet switched network coupling the EQAM to the M-CMTS core. The EQAM generates a routing message according to the routing protocol and inserts EQAM information, such as a description of a modulated channel extending from the EQAM, the service-group information, etc., into the routing message. The EQAM then floods the EQAM information over at least portions of a routing domain by transmitting the routing message to an adjacent intermediary device.

Abstract: In one embodiment, receiving a neighbor solicitation message from a stateless address configuration host; processing the neighbor solicitation message to obtain a device identifier and an internet protocol version six (IPv6) address; storing a mapping between the device identifier and the IPv6 address in a database associated with the network device; and sending the mapping in a new message to a server. In more particular embodiments, the method can include evaluating the database in order to determine whether a particular IPv6 address is a duplicate; and marking an entry associated with the particular IPv6 address in the database for deletion.

Abstract: In one embodiment, a rekey distribution process transmits, from a key server, a multicast probe message intended to be received by at least one group member device. The rekey distribution process also receives, at the key server, an acknowledgement message from each group member device that received the multicast probe message. In turn, the rekey distribution process transmits, from the key server, a multicast rekey data message intended to be received by each group member device from which the key server received an acknowledgment message. Furthermore, the rekey distribution process transmits, from the key server, a unicast rekey data message to each group member device from which the key server did not receive an acknowledgment message.

Abstract: In one embodiment, a QoS manager process that receives, at an EzVPN server device, connection speed data from an EzVPN client device. In addition, the QoS manager process processes, at the EzVPN server device, the connection speed data to determine a QoS policy for a communications session between the EzVPN client device and the EzVPN server device. Furthermore, the QoS manager process applies, at the EzVPN server device, the QoS policy to the communications session between the EzVPN client device and the EzVPN server device as determined by the processing of the connection speed data.

Abstract: In one example, an Edge Quadrature Amplitude Modulation (EQAM) communicates EQAM information to a Modular Cable Modem Termination System (M-CMTS) core using a routing protocol that is configured on a packet switched network coupling the EQAM to the M-CMTS core. The EQAM generates a routing message according to the routing protocol and inserts EQAM information, such as a description of a modulated channel extending from the EQAM, the service-group information, etc, into the routing message. The EQAM then floods the EQAM information over at least portions of a routing domain by transmitting the routing message to an adjacent intermediary device.

Abstract: In one embodiment, group member devices may be divided into at least one cluster, wherein each cluster includes a primary key server designated to synchronize with a master key server. Each cluster further includes at least one registration server configured to communicate with member devices in the group within the cluster and to synchronize with the primary key server.

Abstract: In one embodiment, a Home Agent receives a Mobile IP registration request from a group member, where the group member is a Mobile Node. The Home Agent generates a mobility binding for the group member that associates the group member with a care-of address, wherein the group member is a member of one or more groups. The Home Agent generates a Mobile IP registration reply, where the Mobile IP registration reply identifies one or more key servers. Each of the one or more key servers serves at least one of the one or more groups and is adapted for distributing group cryptography material to members of each group that is served by the corresponding key server. The Home Agent sends the Mobile IP registration reply to the group member, thereby enabling the group member to obtain cryptography material for at least one of the one or more groups from at least one of the one or more key servers to enable the group member to use the cryptography group material to securely communicate with other group members.

Abstract: Systems and methods for using routing protocol extensions to improve spoke to spoke communication in a computer network are disclosed. Embodiments provide systems and methods to establish a tunnel between a first spoke and a hub, exchange routing information between the first spoke and the hub using a routing protocol, extend the routing protocol and an associated database to include next hop mapping information, and establish a tunnel between the first spoke and a second spoke according to information in the database.

Abstract: Techniques are disclosed for dynamically determining or learning hostnames. According to embodiments described herein, a solicitation message is received at a first network device. Based on the solicitation message, a hostname is determined for a second network device that sent the solicitation message. A first network address is also determined for the second network device that sent the solicitation message. A mapping between the hostname and the first network address is stored at the first network device.

Abstract: A method, apparatus and computer program product for preventing infection propagation in a DMVPN is presented. An infected spoke router site is isolated from the DMVPN network such that the spoke router may (bi-directionally) completely or partially limit communicating with any network devices (including the hub router, any other spoke routers etc.) within the DMVPN which prevents the DMVPN melt-down, isolates a worm-infected spoke router site from the rest of the DMVPN and restricts the spread of the worm within the DMVPN network.

Abstract: Systems and methods are provided to facilitate the distribution of audio signals over wireless networks. In one implementation, an audio system includes a head end having an encoder and a wireless network interface. Audio signals associated with a plurality of audio channels are processed by the encoder to provide an encoded signal in accordance with an audio codec. The encoded signal can be provided to a wireless network by the wireless network interface as a plurality of data packets associated with a network address in accordance with a wireless networking protocol, such as an IEEE 802.11 protocol. One or more remote endpoints can also be provided to receive the data packets from the wireless network, assemble the data packets to obtain the encoded signal, and extract at least one of the audio signals from the encoded signal in accordance with the audio codec. Multicast and unicast implementations are also provided.

Abstract: In an embodiment, a method is provided at which it is used in a device. In this method, a logical identifier assigned to the device is identified and additionally, a mesh group identifier identifying a mesh group is identified. The logical identifier and the mesh group identifier are encoded in a routing message, which is used in an inter-domain routing protocol, and this routing message is transmitted to a reflector device in communication with the device. The reflector device is configured to transmit the routing message to a remote device included in the computer network.

Abstract: One embodiment provides a method to interconnect virtual network segments (VNETs) defined for a local-area network (LAN) infrastructure separated by a wide-area network infrastructure. The technique involves the routing device at the LAN-WAN interconnection points to impose or dispose the VNET-shim, which encodes the VNET-id information in a Layer 4 portion of the packet. In a data plane, a new IP protocol value may be used to signify the presence of the VNET-shim followed by cryptography specific information in an IP packet. In a control plane, the routing protocol is expanded to exchange the routing information along with the VNET information.

Abstract: In an embodiment, a method is provided at which it is used in a device. In this method, a logical identifier assigned to the device is identified and additionally, a mesh group identifier identifying a mesh group is identified. The logical identifier and the mesh group identifier are encoded in a routing message, which is used in an inter-domain routing protocol, and this routing message is transmitted to a reflector device in communication with the device. The reflector device is configured to transmit the routing message to a remote device included in the computer network.

Abstract: In one example, a resource reservation protocol is modified to allow a Modular Cable Modem Termination System (M-CMTS) core to use the protocol to reserve, for a flow, network resources as well as a Radio Frequency (RF) channel extending from the remote PHYsical interface (PHY). The modifications allow the M-CMTS core to identify parameters to be used by the edge device for selecting an available RF channel to be reserved for the flow, or to request a particular one of the RF channels. Intermediary devices operating on the DEPI can also reserve resources for the flow without being reconfigured according to the protocol modifications.

Abstract: In particular embodiments, method and system for detecting a failure of a primary ad-splicer, conveying a failure information for the failed primary ad-splicer to a redundant ad-splicer, dynamically forwarding one or more pre-spliced packets intended for the failed primary ad-splicer to the redundant ad-splicer, receiving one or more post-spliced packets from the redundant ad-splicer, and transmitting the post-spliced packets towards one or more target receivers are provided.

Abstract: In one example, a routing protocol is used to propagate or flood information over a network of Cable Modem Termination Systems (CMTSs) in response to a fiber node split that changes which of the CMTSs a cable modem is coupled thereto. The network processes the information and dynamically changes a pseudowire placement to maintain the Layer 2 Virtual Private Network (L2VPN) connectivity among cable modems of different CMTSs after the fiber node split.

Abstract: Method and system for providing ad-splicer N+1 redundancy in a network by employing IP network intelligence and techniques to facilitate a redundant ad-splicer assuming, within a few seconds, the functionality of the failed primary ad-splicer. The network triggers the installation of unicast and multicast routes on an interface by tracking one or more unicast routes to deliver the unicast and (pre-spliced) multicast traffic to the redundant ad-splicer. The network dynamically adjusts the multicast trees to continue to deliver the post-spliced multicast traffic to the intended receivers.