CẤU TRÚC MẠNG LAN (tt)

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iải thích như thế nào lưu lượng mạng được định tuyến giữa VLAN trong mạng hội tụ. • Cấu hình định tuyến giữa các VLAN trên router để cho phép giao tiếp giữa người dùng cuối các thiết bị trên VLAN riêng biệt • Khắc phục sự cố thông thường liên VLAN kết nối các vấn đề.

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Nội dung Text: CẤU TRÚC MẠNG LAN (tt)

CCNA – Semester 3 Chapter 6 - Inter – VLAN Routing CCNA Exploration version 4.0
Objectives • Explain how network traffic is routed between VLANs in a converged network. • Configure inter-VLAN routing on a router to enable communications between end-user devices on separate VLANs • Troubleshoot common inter-VLAN connectivity issues. 2
Introduction 3
Introduction Inter-VLAN Routing permits computers on separate VLANs can communicate with each other 4
Traditional Inter-VLAN Routing • In a traditional network that uses multiple VLANs to segment the network traffic into logical broadcast domains, routing is performed by connecting different physical router interfaces to different physical switch ports. 5
"Router-on-a-stick" Inter-VLAN Routing • "Router-on-a-stick" is a type of router configuration in which a single physical interface routes traffic between multiple VLANs on a network. 6
Switched-based Inter-VLAN Routing • Some switches can perform Layer 3 functions, replacing the need for dedicated routers to perform basic routing on a network. Multilayer switches are capable of performing inter- VLAN routing. 7
Interface and Subinterface 8
Interface • Traditional routing requires routers to have multiple physical interfaces to facilitate inter-VLAN routing. • Each interface is also configured with an IP address for the subnet associated with the particular VLAN that it is connected to. • In this configuration, network devices can use the router as a gateway to access the devices connected to the other VLANs. 9
Interface Configuration 10
Subinterface • To overcome the hardware limitations of inter-VLAN routing based on router physical interfaces, virtual subinterfaces and trunk links are used. • Each subinterface is configured with its own IP address, subnet mask, and unique VLAN assignment, allowing a single physical interface to simultaneously be part of multiple logical networks. • Functionally, the router-on-a-stick model for inter-VLAN routing is the same as using the traditional routing model, but instead of using the physical interfaces to perform the routing, subinterfaces of a single interface are used. 11
Subinterface (cont) 12
Subinterface Configuration 13
Comparison Features Physical Interface Subinterface One physical interface One physical interface for Port Limits per VLAN many VLANs Performance No bandwidth contention Bandwidth contention Access Ports and Connected to access Connected to trunk mode Trunk Ports mode switch port switch port Cost More expensive Less expensive More complex Less complex connection Complexity connection configuration configuration 14
Configure Inter-VLAN Routing 15
Configure Traditional Inter-VLAN Routing Switch Configuration 16
Configure Traditional Inter-VLAN Routing Router Configuration 17
Configure Traditional Inter-VLAN Routing 18
Configure Router-on-a-Stick Inter-VLAN Routing Switch Configuration 19
Configure Router-on-a-Stick Inter-VLAN Routing Router Configuration 20