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2025-04-05 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Servers >
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Three-layer switching technology
(1) using layer 3 switching technology to realize the communication between VLAN
(2) layer 3 switching = layer 2 switching + layer 3 forwarding
Three-layer exchange
Learn layer 2 rewriting information from the layer 3 engine to create a MLS entry in the hardware
Responsible for rewriting and forwarding subsequent packets in the data flow
MLS entry
MLS based on CEF,CEF is a model based on topology forwarding.
(1) forwarding information base (FIB), which is composed of host ip and switch ip
(2) adjacency table, which consists of host MAC and switch MAC
Experimental environment
1. The experimental topology diagram is as follows: interworking between PC1, PC2 and PC3 of the external network through a layer 3 switch.
2. Experimental process
(1) turn on the layer 2 switch sw-2 and set the interface mode
(2) set the interface address of the cloud router. Because the router on the topology diagram has only one network cable connected to the external network, set the router as a default route.
(3) set up layer 3 switch sw-3
3. Experimental results
PC1 interconnects with PC2 and PC3, and the experiment is successful.
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