Arista Networks, Inc.

Petr Budnik

Jeff Jing Yuen Chan

Avininderpal Singh Grewal

Harold Fong

Padmanabh Ratnakar

Sahil Midha

Rohit Shukla

Abdul Haseeb Jehangir

Piyush Lodhi

Systems and methods in which a network switch detects a dropped packet and automatically generates a report with information on the dropped packet. Additionally, a visibility packet that includes the dropped packet and one or more additional headers is generated. The headers are used to route the visibility packet to the pipeline of the network switch that originally processed the dropped packet. The headers also include a visibility indicator that causes the pipeline to store visibility data. As the visibility packet is processed by the pipeline, information (visibility data) generated during the processing of the packet is stored in a visibility memory. The visibility data is retrieved from the visibility memory and added to the generated report prior to transmitting the report to an external collector for analysis of the packet drop.

Utilization of visibility feature to obtain and incorporate drop reasons into mirror on drop reports

The precision time protocol (PTP) runs on the peer switches in an MLAG domain. PTP messages received by one peer switch on an MLAG interface is selectively peer-forwarded to the other peer switch on the same MLAG interface in order to coordinate a synchronization session with a PTP node. The peer-forwarded messages inform one peer switch to be an active peer and the other peer switch to be an inactive peer so that timestamped messages during the synchronization session are exchanged only between the PTP node the active peer, and hence take the same data path.

Precision time protocol with multi-chassis link aggregation groups

Synchronization of clocks among computing devices in a network includes determining master/slave relations among the computing devices. Some computing devices (e.g., switches) include trunk ports configured to carry traffic for several logical networks; e.g., virtual local area networks, VLANs. A trunk port can be associated with a master/slave setting for each logical network that it is configured for. Synchronization of clocks among the computing devices further includes running a synchronization sequence between a trunk port and each computing device on each of the logical networks configured on the trunk port.

VLAN-aware clock synchronization

The precision time protocol (PTP) runs on the peer switches in an MLAG domain. PTP messages received by one peer switch on an MLAG interface is selectively peer-forwarded to the other peer switch on the same MLAG interface in order to coordinate a synchronization session with a PTP node. The peer-forwarded messages inform one peer switch to be an active peer and the other peer switch to be an inactive peer so that timestamped messages during the synchronization session are exchanged only between the PTP node and the active peer, and hence take the same data path.

VLAN-aware clock hierarchy

The forwarding of a management message received in a network device includes determining whether a previously received message sent by the same sender has looped back to the network device. The message is forwarded if the received message is not a loop back of a previously received message, and dropped otherwise.

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Vancouver, Canada

Petr Budnik