Yi Yang

A first encryption key associated with a first tenant is created. The first encryption key is configured in a host where a virtual machine associated with the first tenant is executing, the host including a network interface controller configured to have a virtual network interface function, the virtual network interface function executing on the host and being associated with the virtual machine of the first tenant. The virtual network interface function is caused to bind the first encryption… Show more

A first encryption key associated with a first tenant is created. The first encryption key is configured in a host where a virtual machine associated with the first tenant is executing, the host including a network interface controller configured to have a virtual network interface function, the virtual network interface function executing on the host and being associated with the virtual machine of the first tenant. The virtual network interface function is caused to bind the first encryption key to the virtual machine of the first tenant. The virtual network interface function is caused to encrypt outgoing network traffic of the first tenant using the first encryption key. The virtual network interface function is caused to decrypt incoming network traffic for the first tenant using the first encryption key. Show less

Systems, methods, and non-transitory computer-readable storage media for visualizing current and historical access policy of a group based policy. A first group based policy and a second group based policy are received at a computing device, where each group based policy includes policy rules defining a range of destination internet protocol addresses, a range of source internet protocol addresses and a range of access ports. The computing device renders a three dimensional representation of… Show more

Systems, methods, and non-transitory computer-readable storage media for visualizing current and historical access policy of a group based policy. A first group based policy and a second group based policy are received at a computing device, where each group based policy includes policy rules defining a range of destination internet protocol addresses, a range of source internet protocol addresses and a range of access ports. The computing device renders a three dimensional representation of the first group based policy, based on the policy rules of the first group based policy. The computing device renders a three dimensional representation of the second group based policy, based on the policy rules of the second group based policy. The computing device displays the representations of the first group based policy and second group based policy on a graphical interface. Show less

In one embodiment, a method comprises receiving, by a network device within a tree-based topology rooted by a root network device, a request message from a child network device for generating an optimized tree-based topology for a future use by the child network device at a future time instance; the network device executing an objective function for generating the optimized tree-based topology for the future use by the child network device; and the network device providing network… Show more

In one embodiment, a method comprises receiving, by a network device within a tree-based topology rooted by a root network device, a request message from a child network device for generating an optimized tree-based topology for a future use by the child network device at a future time instance; the network device executing an objective function for generating the optimized tree-based topology for the future use by the child network device; and the network device providing network communications, for the child network device, at the future time instance using the optimized tree-based topology. Show less

In response to a path monitoring task for a particular source/destination pair, a network controller determines whether stored information includes paths for the particular source/destination pair. When the stored information includes paths for the particular source/destination pair, a subset of source ports is selected that covers all the paths for the particular source/destination pair. A probe message is sent to cause an ingress switch to send probe packets using the subset of source ports… Show more

In response to a path monitoring task for a particular source/destination pair, a network controller determines whether stored information includes paths for the particular source/destination pair. When the stored information includes paths for the particular source/destination pair, a subset of source ports is selected that covers all the paths for the particular source/destination pair. A probe message is sent to cause an ingress switch to send probe packets using the subset of source ports. Paths for the particular source/destination pair are computed based on received probe packets. A determination is made whether a topology for the data center network has changed by comparing the paths computed based on the receive probe packets for the particular source/destination pair with the paths included in the stored information for the particular source/destination pair. Show less

In one embodiment, a first router determines whether an interface coupling the first router to one or more second routers is transit-only. When the interface is transit-only, the first router generates an Open Shortest Path First (OSPF) Link State Advertisement (LSA) that includes an address for the interface and a designated network mask. The designated network mask operates as a transit-only identification that indicates the address should not be installed in a Routing Information Base (RIB)… Show more

In one embodiment, a first router determines whether an interface coupling the first router to one or more second routers is transit-only. When the interface is transit-only, the first router generates an Open Shortest Path First (OSPF) Link State Advertisement (LSA) that includes an address for the interface and a designated network mask. The designated network mask operates as a transit-only identification that indicates the address should not be installed in a Routing Information Base (RIB) upon receipt of the OSPF LSA at the one or more second routers. When the network is not transit-only, the first router generates an OSPF LSA that includes the address for the interface but does not include the designated network mask, to permit installation of the address in a RIB upon receipt of the OSPF LSA at the one or more second routers. Show less

Systems, methods, and non-transitory computer-readable storage media for visualizing current and historical access policy of a group based policy. A first group based policy and a second group based policy are received at a computing device, where each group based policy includes policy rules defining a range of destination internet protocol addresses, a range of source internet protocol addresses and a range of access ports. The computing device renders a three dimensional representation of… Show more

Systems, methods, and non-transitory computer-readable storage media for visualizing current and historical access policy of a group based policy. A first group based policy and a second group based policy are received at a computing device, where each group based policy includes policy rules defining a range of destination internet protocol addresses, a range of source internet protocol addresses and a range of access ports. The computing device renders a three dimensional representation of the first group based policy, based on the policy rules of the first group based policy. The computing device renders a three dimensional representation of the second group based policy, based on the policy rules of the second group based policy. The computing device displays the representations of the first group based policy and second group based policy on a graphical interface. Show less

In one embodiment, a method comprises identifying, by a network device, a future time interval for establishment of a corresponding future tree-based topology that is to be optimized according to an identified objective function, the future tree-based topology and corresponding identified objective function distinct from a current tree-based topology optimized according to a corresponding current objective function; and generating and outputting, by the network device, a message advertising the… Show more

In one embodiment, a method comprises identifying, by a network device, a future time interval for establishment of a corresponding future tree-based topology that is to be optimized according to an identified objective function, the future tree-based topology and corresponding identified objective function distinct from a current tree-based topology optimized according to a corresponding current objective function; and generating and outputting, by the network device, a message advertising the network device offering availability of the future tree-based topology optimized at the future time interval for the identified objective function, enabling other network devices to attach to the network device during the future time interval for communications optimized according to the identified objective function. Show less

Present disclosure relates to methods for preparing BGP update messages for transmission and processing received update messages. The methods are based on grouping path attributes common to a plurality of IP address prefixes into respective sets identified with respective set identifiers and, instead of duplicating path attributes in each BGP update message, including a respective identifier referring to a certain set of path attributes provided in an earlier BGP update message when sending… Show more

Present disclosure relates to methods for preparing BGP update messages for transmission and processing received update messages. The methods are based on grouping path attributes common to a plurality of IP address prefixes into respective sets identified with respective set identifiers and, instead of duplicating path attributes in each BGP update message, including a respective identifier referring to a certain set of path attributes provided in an earlier BGP update message when sending subsequent update messages. Grouping of path attributes into individual sets associated with respective identifiers provides significant advantages by enabling re-use of the results of previous processing on both the sending and receiving sides associated with transmission of BGP update messages. In addition, such an approach limits the amount of information transmitted in the control plane because duplicate sets of path attributes may only be transmitted once and merely be referred to in subsequent update messages. Show less

Present disclosure relates to methods for preparing BGP update messages for transmission and processing received update messages. The methods are based on grouping path attributes common to a plurality of IP address prefixes into respective sets identified with respective set identifiers and, instead of duplicating path attributes in each BGP update message, including a respective identifier referring to a certain set of path attributes provided in an earlier BGP update message when sending… Show more

Present disclosure relates to methods for preparing BGP update messages for transmission and processing received update messages. The methods are based on grouping path attributes common to a plurality of IP address prefixes into respective sets identified with respective set identifiers and, instead of duplicating path attributes in each BGP update message, including a respective identifier referring to a certain set of path attributes provided in an earlier BGP update message when sending subsequent update messages. Grouping of path attributes into individual sets associated with respective identifiers provides significant advantages by enabling re-use of the results of previous processing on both the sending and receiving sides associated with transmission of BGP update messages. In addition, such an approach limits the amount of information transmitted in the control plane because duplicate sets of path attributes may only be transmitted once and merely be referred to in subsequent update messages. Show less

A method for controlling transit of routing messages in a network comprising multiple autonomous systems (AS) is disclosed. The method includes receiving, at a first AS, a routing message of an inter-AS routing protocol and identifying that the routing message comprises transit domain control (TDC) information specifying one or more autonomous systems to which the routing message may be propagated and/or one or more autonomous systems to which the routing message may not be propagated. The… Show more

A method for controlling transit of routing messages in a network comprising multiple autonomous systems (AS) is disclosed. The method includes receiving, at a first AS, a routing message of an inter-AS routing protocol and identifying that the routing message comprises transit domain control (TDC) information specifying one or more autonomous systems to which the routing message may be propagated and/or one or more autonomous systems to which the routing message may not be propagated. The method further includes propagating the routing message from the first AS to a second AS in accordance with the TDC information. Show less

In one embodiment, a first router determines whether a network coupling the first router to one or more second routers is transit-only, wherein transit-only indicates connecting only routers to provide for transmission of data from router to router. When the network is transit-only, the first router generates an Open Shortest Path First (OSPF) Link State Advertisement (LSA) that includes an address for the network and a designated network mask. The designated network mast operates as a… Show more

In one embodiment, a first router determines whether a network coupling the first router to one or more second routers is transit-only, wherein transit-only indicates connecting only routers to provide for transmission of data from router to router. When the network is transit-only, the first router generates an Open Shortest Path First (OSPF) Link State Advertisement (LSA) that includes an address for the network and a designated network mask. The designated network mast operates as a transit-only identification that indicates the address should not be installed in a Routing Information Base (RIB) upon receipt of the OSPF LSA at the one or more second routers. When the network is not transit-only, the first router generates an OSPF LSA that includes the address for the network but does not include the designated network mask, to permit installation of the address in a RIB upon receipt of the OSPF LSA at the one or more second routers. Show less