Cisco Technology, Inc.

Hongbo Xia

Xiaorong Wang

Changhong Shen

Yu Zhang

Jianda Liu

Xiao-Rong Wang

Yin Wang

Dapeng Liu

Yicheng Liu

Hunan Cao

Jiayi You

Lulu Wang

Pu Duan

Wei Zhou

FeiXiang Zhao

Chunxu Zhou

In one embodiment, a method includes determining, by a first network component, a sender shaper drop value based on the following: a maximum sequence number; a minimum sequence number; and a sender sequence counter number associated with the first network component. The method also includes determining, by the first network component, a wide area network (WAN) link drop value based on the sender sequence counter number associated with the first network component and a receiver sequence counter number associated with a second network component. The method further includes determining, by the first network component, whether to adjust a sender shaper rate based on the sender shaper drop value and the WAN link drop value.

Systems and methods for adapting a WAN egress shaper rate

Techniques and architecture are described for tracking flows of packets in a network using a packet color marking scheme for obtaining network end-to-end traffic flow metrics in the network. In particular, in configurations, a user may be prompted to specify a site and a virtual private network (VPN) at which to start a trace for packet flows using a coloring marking scheme within the network. Given the VPN and the site, it is possible to monitor interested packet flows and apply metadata, e.g., colors, on flow packets. Remote wide area network (e.g., software defined WAN (SD-WAN)) routers receiving the packets with metadata may automatically trace the same flow and apply the same metadata to a next hop router. Hence, an end-to-end network path may be discovered.

Network end-to-end traffic flow statistics from arbitrary network location

Techniques and architecture are described for reusing QoS policy instances for groups of software defined wide area network (SDWAN)-based transport locators (TLOCs) sharing the same attributes. For example, the attributes may include subscriber transport bandwidth (e.g., a transport bandwidth based on a user profile), QoS policy template profile information, transport locator color, etc. All of this information may be shared across the SDWAN fabric and may be available in the overlay management protocol (OMP) TLOC database.

Policy instance reuse in control planes of networks

This disclosure describes techniques and mechanisms for intelligently sampling packet flows within a network. The techniques enable the sampling of a limited set of packet flows that show greatest amount of information about the network from the packet flows in order to provide the greatest insight on application performance, network packet, and critical events within the network. Additionally, the techniques provide configurable parameters, such that the techniques are customizable for each user's network.

Packet flow sampling in network monitoring

Techniques and architecture are described grouping various sources of traffic within a network into grouping fields and assigning each combination of grouping field values an aggregate identification (ID). A first hop edge router may receive a packet and search a mapping table for a corresponding aggregate ID for the combination of grouping field values within the mapping table. If not found, the first hop edge router may assign a corresponding aggregate ID for the combination of grouping field values and store the new aggregate ID for the combination of grouping field values in the mapping table. The first hop edge router may forward the packet on through the network with the aggregate ID embedded in metadata. Routers within the network may measure and aggregate flow metrics of the packet within the network based on the aggregate ID and provide the measurements to the network controller.

Dynamic aggregate ID based flow metrics aggregation

According to certain embodiments, a system comprises one or more processors and one or more computer-readable non-transitory storage media comprising instructions that, when executed by the one or more processors, cause one or more components of the system to perform operations. The operations comprise sending data from a hub to a spoke and receiving feedback from the spoke at the hub. The feedback is based on at least one of bandwidth utilization or occurrence of a congestion state detected by the spoke. The operations further comprise adjusting a shaper rate of an adaptive Quality of Service (QoS) shaper based at least in part on the feedback received from the spoke.

Dynamic deterministic adjustment of bandwidth across multiple hubs with adaptive per-tunnel quality of service (QoS)

The present disclosure is directed to determining bandwidth capacity in a WAN path and includes one or more processors and one or more computer-readable non-transitory storage media comprising instructions that, when executed by the one or more processors, cause one or more components of the system to perform operations including, selecting a SD-WAN path for which to determine bandwidth capacity, wherein the path is associated with a Quality of Service (QoS) shaper having a pre-determined shaper rate, incrementally increasing a test load applied on the selected path, wherein the test load is applied concurrently with existing user traffic, calculating a performance score for the path after each increase in the test load, determining a performance of the path based on the calculated performance score, and updating the shaper rate of the QoS shaper based on the performance of the path.

Systems and methods for protective proactive adaptive active bandwidth measurement in SD-WAN networks

In response to receiving one or more packets from an interface, an anchoring border router classifies the traffic flow and either transmits the packets based upon the routing control table as usual, or determines that the packets of the traffic flow are to be forwarded to a forwarding border router. Upon determining that the packets are to be forwarded, the packets are encapsulated with a routing encapsulation key corresponding to a routing path and are forwarded from the anchoring border router to the forwarding border router via a routing encapsulation tunnel. When a forwarding border router receives the redirected packets over the routing encapsulation tunnel, the forwarding border router removes the routing encapsulation key from the packets of the traffic flow and transmits the packets via a routing path corresponding to the routing encapsulation key.

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Shanghai, China

Hongbo Xia