Abstract: Systems, methods, and non-transitory computer-readable storage media for a miscabling detection protocol. One or more switches can periodically send miscabling protocol (MCP) packets on non-fabric ports on all configured EPG VLANs. A first switch located at a network fabric receives a miscabling protocol (MCP) packet indicating an identity of an originating switch and a port number of an originating port of the MCP packet via a receiving port on the first switch, wherein the MCP packet is received from an external network connected to the receiving port, and wherein the originating switch and originating port are also located at the network fabric and connected to the external network. Based on the MCP packet, the first switch then detects a loop between the receiving port, the originating port, and the external network. Next, the first switch blocks the receiving port or the originating port in response to detecting the loop.

Abstract: Disclosed herein are methods of forwarding packets on a network, such as a leaf-spine network having leaf devices and spine devices. The methods may include receiving a packet at an ingress leaf device, and determining based, at least in part, on a header of the packet whether the packet is to be transmitted to a spine device. The methods may further include ascertaining based, at least in part, on a header of the packet whether to perform encapsulation on the packet, encapsulating the packet according to a result of the ascertaining, and then transmitting the packet to a spine device according to a result of the determining. Also disclosed herein are network apparatuses which include a processor and a memory, at least one of the processor or the memory being configured to perform some or all of the foregoing described methods.

Abstract: Systems, methods, and non-transitory computer-readable storage media for managing routing information in overlay networks. A first tunnel endpoint in an overlay network may receive an encapsulated packet from a second tunnel endpoint. The encapsulated packet may have been encapsulated at the second tunnel endpoint based on another packet originating from a source host that is associated with the second tunnel endpoint. The encapsulated packet can include a source host address for the source host and a source tunnel endpoint address for the second tunnel endpoint. The first tunnel endpoint can then update a lookup table based on an association between the source host address and the source tunnel endpoint address.

Abstract: The subject technology addresses the need in the art for improving utilization of network bandwidth in a multicast network environment. More specifically, the disclosed technology addresses the need in the art for extending multipathing to tenant multicast traffic in an IP overlay network, which enables the network to fully utilize available bandwidth for multicast traffic. In some examples, nodes in the overlay network may be connected by virtual or logical links, each of which corresponds to a path, perhaps through many physical links, in the underlying network.

Abstract: Systems, methods, and non-transitory computer-readable storage media for translating source addresses in an overlay network. An access switch in an overlay network, such as a VXLAN, may receive an encapsulated packet from a tunnel endpoint in the overlay network. The encapsulated packet may originate from a host associated with the tunnel endpoint and be encapsulated at the tunnel endpoint with a first source tunnel endpoint address and a destination tunnel endpoint address. The access switch may replace the first source tunnel endpoint address in the encapsulated packet with a second source tunnel endpoint address of the access switch to yield a translated packet. The access switch may then transmit the translated packet towards the destination tunnel endpoint address.

Abstract: Aspects of the subject disclosure relate to methods for detecting a link failure between the first network device and a destination node, receiving a data packet addressed to the destination node, and rewriting encapsulation information of the first data packet. Subsequent to rewriting the encapsulation information of the first data packet, the first data packet is forwarded to a second network device (e.g., using updated address information in the packet header), wherein the second network device is paired with the first network device in the virtual port channel. In certain aspects, systems and computer readable media are also provided.

Abstract: Systems, methods, and non-transitory computer-readable storage media for a miscabling detection protocol. One or more switches can periodically send miscabling protocol (MCP) packets on non-fabric ports on all configured EPG VLANs. A first switch located at a network fabric receives a miscabling protocol (MCP) packet indicating an identity of an originating switch and a port number of an originating port of the MCP packet via a receiving port on the first switch, wherein the MCP packet is received from an external network connected to the receiving port, and wherein the originating switch and originating port are also located at the network fabric and connected to the external network. Based on the MCP packet, the first switch then detects a loop between the receiving port, the originating port, and the external network. Next, the first switch blocks the receiving port or the originating port in response to detecting the loop.

Abstract: Embodiments of an N-Port ID virtualization (NPIV) proxy module, NPIV proxy switching system, and methods are generally described herein. Other embodiments may be described and claimed. In some embodiments, login requests are distributed over a plurality of available N-ports to allow servers to be functionally coupled to F-ports of a plurality of fiber-channel (FC) switches. Fiber-channel identifiers (FCIDs) are assigned to the servers in response to the logon requests to provide single end-host operations for each of the servers.

Abstract: Embodiments of an N-Port ID virtualization (NPIV) proxy module, NPIV proxy switching system, and methods are generally described herein. Other embodiments may be described and claimed. In some embodiments, login requests are distributed over a plurality of available N-ports to allow servers to be functionally coupled to F-ports of a plurality of fiber-channel (FC) switches. Fiber-channel identifiers (FCIDs) are assigned to the servers in response to the logon requests to provide single end-host operations for each of the servers.