Which protocol prevents fiber failures from causing a Layer 2 loop in a dark fiber DCI?
Which protocol prevents fiber failures from causing a Layer 2 loop in a dark fiber DCI?
UDLD (Uni-directional Link Detection) is a protocol used to detect unidirectional failures on fiber optic connections. In a dark fiber Data Center Interconnect (DCI), a unidirectional link can occur if there is a problem with the reception or transmission in the fiber strands, which may otherwise go unnoticed and cause a Layer 2 loop. UDLD aids in preventing these loops by detecting and disabling faulty links.
Answer is UDLD DCI: DataCenter Interconnect (not ACI - which is another Cisco product) Dark Fiber: is the marketing term for a direct fiber cable dug in the ground between two DCs. UDLD is Uni-directional Link Detection protocol that is used to detect if there is a problem with rx/tx in the fiber strands that may cause switching loop.
UDLD is specifically designed to detect unidirectional link failures on fiber optic connections.
Im sorry answer is correct Udld
The answer is wrong. The ACI fabric does not participate in the Spanning Tree Protocol. Instead, it implements the Mis-Cabling Protocol (MCP) to detect loops. MCP works in a complementary manner with STP that is running on external Layer 2 networks and handles bridge protocol data unit (BPDU) packets that access ports receive. The answer is MCP