Juniper Networks, Inc.

Yanfang Zhang

Scott Mackie

Swamy Sadashivaiah Renu Kananda

Mu Lin

Hui Qu

Zi Zhou

Ashok Kumar Padhy

Sreenivas Gadela

A network device may receive an original configuration that includes configuration objects, and may generate, based on the original configuration, a dependency graph that includes nodes representing and entries representing the configuration objects. The network device may receive a configuration update that includes new configuration objects, and may update the dependency graph based on the configuration update and to generate an updated dependency graph that includes new nodes and/or new entries representing the new configuration objects. The network device may test the configuration update, based on the updated dependency graph, to determine whether the configuration update fails or succeeds. The network device may selectively implement the configuration update based on the configuration update succeeding or perform a rollback of the configuration update, based on the configuration update failing, to restore the original configuration.

Rollback-on-error support for forwarding components of a network device

The control plane of a network device comprises a plurality of software processes that manage routing control operations of the device. Through a hypervisor in the control plane, a managing virtual machine controls access to a first virtual machine running a first software system to control a routing communication session between the network device and other network devices. In response to an in-service software upgrade request, the managing virtual machine initializes a second virtual machine. On the second virtual machine, the second software system is loaded. State data maintained by the managing virtual machine can be transferred to the second virtual machine, and the second virtual machine takes control of the routing communication session. During the transfer of control from the first virtual machine to the second virtual machine, techniques of 'non-stop forwarding' and 'graceful restart' can be implemented to minimize the effect the switchover has on the network.

Configuration update on virtual control plane

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San Jose, CA, United States of America

Yanfang Zhang