Cisco Technology, Inc.

Ajay Kumar Modi

Umamaheswararao Karyampudi

Krishna Doddapaneni

Kit Chiu Chu

Smita Rai

Saravanan Sampathkumar

Murukanandam Kamalam Panchalingam

Gautam Venkataramanan

Kamal Bakshi

Yousuf H Khan

Eric Michel Levy-Abegnoli

Munish Mehta

Azeem Suleman

Sarang M Dharmapurikar

Govind Prasad Sharma

Maurizio Portolani

Sridhar Vallepalli

Abhishek Gupta

Ramanan Vaidyanathan

Junyun Li

Ganlin Wu

Sudhakar Chunduru

Atul Garg

Vedashree Bagade

Gilles Rhéal Roy

Eddie Tan

Zero-trust dynamic discovery in provided by identifying a plurality of endpoints, including targets and initiators, connected to a software defined network, wherein the targets are provided on the software defined network according to a network addressable memory standard that lacks a native discovery service; grouping the targets into a plurality of target groups and the initiators into a plurality of initiator groups; and in response to receiving a discovery request from a given initiator grouped in a given initiator group of the plurality of initiator groups, returning addressing information for a target group of the plurality of target groups associated with the given initiator group in a security policy configuration for the software defined network.

Zero-trust dynamic discovery

Disclosed is a method for continuous in-line monitoring of data-centric traffic to guarantee application performance. The method includes, in each switch of a plurality of switches in a network fabric, grouping all packets entering each respective switch of the plurality of switches based on either 5-tuple applications or EPG based applications, collecting performance statistics at every hop in the network fabric across all flows in-line in a flow table maintained in each respective switch and periodically exporting the performance statistics to analysis module.

System and method for continuous in-line monitoring of data-center traffic

Techniques for management of traffic in a network. The techniques provide application awareness in a Network Address Translation (NAT) system. In some examples, a first traffic is received at a first switch in a network from a first application hosted behind the first switch. The first switch identifies a first resource tag associated with the application from the first traffic. Further, the first switch identifies a first rule from the first resource tag indicating that the first traffic is to be routed through an intermediate device that performs network address translation. Moreover, the first switch transmits the traffic to an intermediate device, which perform NAT to translate the source IP address of the first traffic to a second IP address. Finally, the intermediate device sends the traffic to a destination device indicated by the first traffic.

Application awareness in a data network with network address translation

Relay functionality may be provided. A network device may receive a response packet and may determine that one of Option-82 and Option-18 information is not present in the received response packet. Next, in response to determining that one of Option-82 and Option-18 information is not present in the received response packet, a database may be queried for information associated with the response packet. Then, based on the information associated with the response packet, the response packet may be sent to a client device associated with the response packet.

Relay functionality in an application centric infrastructure (ACI) fabric

Techniques for hierarchical security policies are disclosed. A first network configuration is received, where the first network configuration includes a plurality of subnets and a plurality of security zones. An updated network configuration is generated based on the first network configuration by generating, for a first security zone of the plurality of security zones, a first master class, and generating, for each respective subnet of the plurality of subnets, a respective bridge domain. For each respective bridge domain, a respective local endpoint group (EPG) corresponding to the first security zone is created, and the first master class is assigned to the respective local EPG. Finally, one or more contracts are generated for the first master class based on the first network configuration.

Scalable security policy architecture with segregated forwarding and security plane and hierarchical classes

A network device receives a fragmented packet of an internet protocol (IP) packet. The fragmented packet is subsequently received relative to an initial fragmented packet of the IP packet and includes a first set of tuple information. The network device determines an entry of a hash table associated with the IP packet, based on the first set of tuple information and a fragment identifier (ID) within the fragmented packet. The network device retrieves a second set of tuple information associated with the fragmented packet from the hash table entry, and transmits an indication of the first and second sets of tuple information.

Accurate analytics, quality of service and load balancing for internet protocol fragmented packets in data center fabrics

Disclosed is a method for continuous in-line monitoring of data-centric traffic to guarantee application performance. The method includes, in each switch of a plurality of switches in a network fabric, grouping all packets entering each respective switch of the plurality of switches based on either 5-tuple applications or EPG based applications, collecting performance statistics at every hop in the network fabric across all flows in&#x2014;line in a flow table maintained in each respective switch and periodically exporting the performance statistics to analysis module.

A first leaf switch may receive from a first host, a request for a second host that is not known at the first leaf switch. The first host may be within a first End Point Group (EPG) and the second host being within a second EPG. The first EPG and the second EPG may be in a Bridge Domain (BD). Flood in encapsulation may be enabled for the first EPG and for the second EPG. Next, the first leaf switch may flood the request locally in the first EPG and to a spine switch with a VNID of the first EPG. The spine switch may then flood the request to a second leaf switch where the BD is present. The second leaf switch may send a glean request for the second host, receive, in response to sending the glean request, a reply, and learn the second host locally in response to receiving the reply.

Support for flooding in encapsulation and inter-VLAN communication via proxy-ARP

Embodiments provide for mitigating priority flow control deadlock in stretch topologies by initializing a plurality of queues in a buffer of a leaf switch at a local cluster of a site having a plurality of clusters, wherein each queue of the plurality of queues corresponds to a respective one cluster of the plurality of clusters; receiving a pause command for no-drop traffic on the leaf switch, the pause command including an internal Class-of-Service (iCoS) identifier associated with a particular cluster of the plurality of cluster and a corresponding queue in the plurality of queues; and in response to determining, based on the iCoS identifier, that the pause command was received from a remote spine switch associated with a different cluster than the local cluster: forwarding the pause command to a local spine switch in the local cluster; and implementing the pause command on the corresponding queue in the buffer.

Mitigating priority flow control deadlock in stretch topologies

Theft detection in data center networks may be provided. First, a first leaf switch may create an entry in a first distributed secure cache in response to an endpoint appearing on the first leaf switch. The entry may correspond to the endpoint and may be marked as having a tentative state. Then a request message may be sent to a plurality of leaf switches. The request message may comprise data identifying the endpoint. Next, a reply message may be received in response to the request message from a second leaf switch within the plurality of leaf switches. The tentative state may then be removed from the entry in response to the reply message indicating that the endpoint is valid.

Detecting IP address theft in data center networks

Systems, methods, and computer-readable media for improving debugging and troubleshooting of datacenter networks, and more particularly improving the speed of forwarding/data path related problems without going into ASIC level debugging. A switch could, for example, have a processor which communicates with an ASIC. The processor can receive flow information and a notification from the ASIC, the notification indicating a predefined error condition has been identified in a packet. The processor can modify the ASIC programming based on the notification, such that the ASIC records additional, more-detailed, flow information for the switch. The processor can then receive, from the modified ASIC, the additional flow information. The additional flow information can then be used (either by the processor or by an operator) to identify the exact reason for the errors in the flow path.

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San Jose, CA, United States of America

Ajay Kumar Modi