Abstract: A network device may receive, from a collector device, a request for telemetry data associated with service interfaces and counters of the network device. The network device may determine, based on the request, a first quantity of the service interfaces and a second quantity of the counters. The network device may determine a first time interval to send delta values of the telemetry data associated with the service interfaces and the counters, and a second time interval to send absolute values of the telemetry data, based on the first time interval, the first quantity of the service interfaces, and the second quantity of the counters. The network device may provide, to the collector device, the absolute values of the telemetry data based on the second time interval and may provide, to the collector device, the delta values of the telemetry data based on the first time interval.

Abstract: This disclosure describes a network element controller that communicates with a bank of network elements over a software defined network (SDN) to provide DNS responds to external users. The network elements, such as switches and routers, reside within a computer perimeter network or data center and intercept DNS requests from resolving DNS servers that are destined for an authoritative name server. The network elements, in turn, send a DNS response to the resolving DNS servers on behalf of the authoritative name server, which include a corresponding DNS record and a source address of the authoritative name server. In one embodiment, the network element controller proactively programs DNS records on each of the network elements included in the perimeter network.

Abstract: A network service dispatcher is provided that transparently navigates network traffic through network service appliances utilizing sub-session connection information generated in accordance with policies pertaining to a client-server session. The network service dispatcher intercepts a first data packet of a new session between two computer systems and generates sub-session connection information that navigates the data packet through one or more network service appliances in a manner transparent to the client or server. In turn, the network service dispatcher utilizes the sub-session connection information to navigate subsequent forward or reverse data packets in the session without performing a policy-based search for each data packet.

Abstract: A network service dispatcher is provided that transparently navigates network traffic through network service appliances utilizing sub-session connection information generated in accordance with policies pertaining to a client-server session. The network service dispatcher intercepts a first data packet of a new session between two computer systems and generates sub-session connection information that navigates the data packet through one or more network service appliances in a manner transparent to the client or server. In turn, the network service dispatcher utilizes the sub-session connection information to navigate subsequent forward or reverse data packets in the session without performing a policy-based search for each data packet.