FabricPath Echo Operation Overview
FabricPath Echo operation measures end-to-end response time between two devices in the FabricPath network. The response time is computed by measuring the time taken between sending one FabricPath echo request message (packet) to the destination switch and receiving an echo reply. This provides the round-trip time (RTT) for the packet.
The illustrations in the following figures show the IP SLA FabricPath Echo operation between Virtual Device Contexts (VDCs) on the same device and between two devices, one configured as Sender and the other as Responder.
FabricPath Echo operations help network operators and administrators diagnose data plane failures in Transparent Interconnection of Lots of Links (TRILL) or FabricPath networks by measuring the active performance of the corresponding network and verifying the connectivity of the flow. Users can regularly send echo packets and monitor network performance using system logs and Simple Network Management Protocol (SNMP) traps.