Abstract: Systems and methods are provided herein for a mechanism for faster convergence of network traffic after a network device's link is interrupted by leveraging the withdrawal of the ethernet virtual private network (EVPN) auto discovery (AD) route. This may be accomplished by a first device checking an ethernet segment identifier (ESI) status flag before generating an entry in the first device's forwarding table, where the entry is based on an IP route for a host received by a second network device. In response to receiving a withdrawal of an EVPN AD route from the second device, the first device may update the ESI status flag to indicate that the host on the ethernet segment (ES) is reachable only via the third device and update the entry that was based on the IP route for the host received by the second network device to prevent sending traffic to the host via the second device.

Abstract: Techniques disclosed herein provide a method for configuring a network in DCI environment. An EVPN session is established between a first gateway device of a first network, and a second gateway device of a second network that are linked by L2 DCI link. An ESI is allocated for that EVPN session. A label is created for every combination of the ESI and media access control virtual routing and forwarding table (MAC VRF) that is locally configured at the first gateway device. An EVPN path is received for a host in the first network that is associated with MAC VRF. The path in imported the first MAC VRF by the first gateway device and exported via the inter-DCI EVPN session. The second gateway device identifies a label for MAC and re-exports it in local EVPN session with the identified label.

Abstract: Techniques disclosed herein provide a method for configuring a network in DCI environment. An EVPN session is established between a first gateway device of a first network, and a second gateway device of a second network that are linked by L2 DCI link. An ESI is allocated for that EVPN session. A label is created for every combination of the ESI and media access control virtual routing and forwarding table (MAC VRF) that is locally configured at the first gateway device. An EVPN path is received for a host in the first network that is associated with MAC VRF. The path in imported the first MAC VRF by the first gateway device and exported via the inter-DCI EVPN session. The second gateway device identifies a label for MAC and re-exports it in local EVPN session with the identified label.

Abstract: Systems and methods are provided herein for a mechanism for faster convergence of network traffic after a network device's link is interrupted by leveraging the withdrawal of the ethernet virtual private network (EVPN) auto discovery (AD) route. This may be accomplished by a first device checking an ethernet segment identifier (ESI) status flag before generating an entry in the first device's forwarding table, where the entry is based on an IP route for a host received by a second network device. In response to receiving a withdrawal of an EVPN AD route from the second device, the first device may update the ESI status flag to indicate that the host on the ethernet segment (ES) is reachable only via the third device and update the entry that was based on the IP route for the host received by the second network device to prevent sending traffic to the host via the second device.

Abstract: Techniques for implementing neighbor equivalence groups on a network device are provided, where a neighbor equivalence group is a group of peers of the network device that communicate identical control plane state information for a given network protocol to the network device. In the context of Border Gateway Protocol (BGP), these techniques can include (1) creating, by the network device, a neighbor equivalence group for a set of BGP peers that advertise the same BGP paths to the device, (2) maintaining, by the network device, a single path database for the neighbor equivalence group (rather than one path database for each BGP peer in the group), and (3) immediately processing by the network device, BGP path update/withdrawal messages received from any of the BGP peers in the group against the single path database, without waiting for the same message to be received from every peer.

Abstract: Techniques for implementing neighbor equivalence groups on a network device are provided, where a neighbor equivalence group is a group of peers of the network device that communicate identical control plane state information for a given network protocol to the network device. In the context of Border Gateway Protocol (BGP), these techniques can include (1) creating, by the network device, a neighbor equivalence group for a set of BGP peers that advertise the same BGP paths to the device, (2) maintaining, by the network device, a single path database for the neighbor equivalence group (rather than one path database for each BGP peer in the group), and (3) immediately processing. by the network device, BGP path update/withdrawal messages received from any of the BGP peers in the group against the single path database, without waiting for the same message to be received from every peer.

Abstract: In general, techniques are described for monitoring memory usage in computing devices. A computing device comprising a memory and a control unit that executes a kernel of an operating system having kernel sub-systems may implement the techniques. A memory manager kernel subsystem, in response to requests for amounts of the memory from other one kernel sub-systems, allocates memory blocks from the memory. The memory manager, in response to requests to de-allocate one or more of the allocated memory blocks, determines the corresponding requested amounts of memory and sizes of the de-allocated blocks. The memory manager then generates memory usage information based on the determined requested amounts of memory and the determined ones of the two or more different sizes. The memory usage information specifies usage of the memory in terms of the two or more different sizes of the allocated plurality of memory blocks.