3 ms·
Cut through switching in 10 GbE applications however does not modify ANYTHING about the packet as it gets sent along. It'll calculate that a packet was bad, but
by X-Istence 11y ago
Cut through switching in 10 GbE applications however does not modify ANYTHING about the packet as it gets sent along. It'll calculate that a packet was bad, but at that point it's already too late to do anything about it because it's already forwarded part or all of it onto the next wire segment.
This can be equally frustrating, as now you have to trace the entire path from switch to switch and try and figure out what cable/fibre is bad, and you see error counters increase on multiple interfaces.
- sargun 11y agoIt's not store-and-forward vs. cut-through. It's whether or not the switch acts as a layer 3 device, or a layer 2 device. If it acts as a plain old layer 2 device, it can pass the packet, unmodified. As a layer 3 device, it modifies the layer 2 headers, and the TTL. As a layer 3 device, it can still cut-through. Source: Broadcom documentation
- X-Istence 11y agoI would call a layer 3 device a router. Whether it is marketed as a switch or not. Layer 2 devices is what I was referring to. My experience is with the Nexus platform from Cisco, pure layer 2.