Juniper Networks, Inc.

Ashok Singh R

Anish Mehta

Megh Bhatt

Arvind Batalagundu Viswanathan

Megh P Bhatt

Techniques are disclosed for session-based traffic statistics. In an example method, a virtual router of a cloud data center processes traffic flows for virtual machines executing on a server within the cloud data center to generate traffic flow statistics. The traffic flows include ingress traffic flows originating from the virtual machines and destined for a network of the cloud data center, and egress traffic flows originating from the network of the cloud data center and destined for the virtual machines. A virtual routing agent processes the traffic flow statistics to identify pairs of ingress and egress traffic flows corresponding to a common communication session. The virtual routing agent generates, for each identified pair of ingress and egress traffic flows, session records comprising traffic session statistics for each of the ingress and egress traffic flows of the pair and uploads the session records to a traffic collector for the network.

Session-based traffic statistics logging for virtual routers

The techniques described herein may dynamically adjust the sampling threshold based on a comparison of a flow export rate to a configured flow export rate. Based on the comparison of the flow export rate and the configured flow export rate, the network device may dynamically adjust the sampling threshold, such as increasing, reducing, or not changing the sampling threshold. Moreover, traffic flows are exported based on the adjusted sampling threshold. For example, if a number of bytes of a packet flow is more than or equal to the adjusted sampling threshold, network devices may export the sampled packet flow with the byte count and packet count of the sampled packet flow reported as-is. When a number of bytes of a packet flow is less than the adjusted sampling threshold, the packet flow will be exported with the byte count and packet count adjusted according to a probability.

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Bengaluru, India

Ashok Singh R