Miscabling detection protocol

摘要

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.

主权项

1. A computer-implemented method comprising:
receiving, via a receiving non-fabric port on a receiving switch located on a network fabric, a miscabling protocol packet indicating an identity of an originating switch on the network fabric and an originating non-fabric port associated with the originating switch, wherein the miscabling protocol packet is received from an external network connected to the receiving non-fabric port, wherein the originating switch and originating non-fabric port are also located on the network fabric and connected to the external network, wherein the receiving non-fabric port and the originating non-fabric port are both:
on a same flood domain in the network fabric;associated with different virtual local area networks or endpoint groups associated with the network fabric; andassigned to a same virtual local area network on the external network; and based on the miscabling protocol packet, detecting a loop between the receiving port, the originating port, and the external network; and blocking at least one of the receiving port and the originating port associated with the miscabling protocol packet in response to detecting the loop.