Questions and Answers
What is inter-VLAN routing?
The process of forwarding network traffic from one VLAN to another VLAN.
Which of the following are inter-VLAN routing options? (Select all that apply)
Legacy inter-VLAN routing scales well beyond the number of VLANs available.
False
What significant limitation does legacy inter-VLAN routing have?
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What is the main advantage of the router-on-a-stick method?
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The router-on-a-stick method can scale beyond 50 VLANs.
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What is an SVI?
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Study Notes
Module Overview
- Module title focuses on Inter-VLAN Routing within Switching, Routing, and Wireless Essentials v7.0.
- Objective is to troubleshoot inter-VLAN routing on Layer 3 devices.
Inter-VLAN Routing Operation
- VLANs segment switched Layer 2 networks, preventing direct communication between rooms without a router or Layer 3 switch.
- Inter-VLAN routing facilitates network traffic forwarding between VLANs.
- Three main inter-VLAN routing options exist:
- Legacy Inter-VLAN Routing: Outdated method using multiple physical Ethernet interfaces; not scalable.
- Router-on-a-Stick: Uses one physical interface for routing traffic between multiple VLANs; suitable for small to medium networks.
- Layer 3 Switch with SVIs: Most scalable solution for medium to large organizations.
Legacy Inter-VLAN Routing
- Involves routers with multiple Ethernet interfaces connected to different VLANs for inter-VLAN communication.
- Acts as a default gateway for hosts in the VLAN subnet.
- Scalability is limited as it rapidly exhausts physical interfaces, making it impractical for modern networks.
Router-on-a-Stick Inter-VLAN Routing
- Overcomes limitations of the legacy method by utilizing a single physical Ethernet interface as an 802.1Q trunk.
- The router is connected to a trunk port on a Layer 2 switch, using subinterfaces to handle different VLANs.
- Subinterfaces serve as virtual interfaces, each with its own IP address and VLAN assignment, facilitating logical routing.
- Supports routing decisions based on destination IP, with VLAN-tagged traffic exiting via correctly assigned interfaces.
- Does not scale well beyond 50 VLANs.
Inter-VLAN Routing on a Layer 3 Switch
- The modern approach uses Layer 3 switches and Switched Virtual Interfaces (SVIs) for efficient inter-VLAN routing.
- Each SVI is configured as a virtual interface on the switch, streamlining communication between VLANs.
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Description
Test your knowledge on inter-VLAN routing from the Switching, Routing and Wireless Essentials v7.0 course. This quiz will cover troubleshooting methods and configuration options for inter-VLAN routing on Layer 3 devices. Enhance your understanding of networking principles with this focused assessment.
