Inter-VLAN Routing Quiz
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Inter-VLAN Routing Quiz

Test your knowledge about inter-VLAN routing methods and configuration using Layer 3 switches and SVIs. Understand the advantages of Layer 3 switches over routers and troubleshoot common issues in inter-VLAN routing scenarios.

Created by
@RightSmokyQuartz1782

Questions and Answers

What is the 'router-on-a-stick' inter-VLAN routing method and how does it overcome the limitation of the legacy inter-VLAN routing method?

The 'router-on-a-stick' inter-VLAN routing method only requires one physical Ethernet interface to route traffic between multiple VLANs on a network. It involves configuring a Cisco IOS router Ethernet interface as an 802.1Q trunk and connecting it to a trunk port on a Layer 2 switch. The router interface is then configured using subinterfaces to identify routable VLANs, which are software-based virtual interfaces. Each subinterface is independently configured with an IP address and VLAN assignment, facilitating logical routing.

How is VLAN-tagged traffic handled in the 'router-on-a-stick' inter-VLAN routing method?

When VLAN-tagged traffic enters the router interface, it is forwarded to the VLAN subinterface. After a routing decision is made based on the destination IP network address, the router determines the exit interface for the traffic. If the exit interface is configured as an 802.1q subinterface, the data frames are VLAN-tagged with the new VLAN and sent back out the physical interface.

What is the limitation of the 'router-on-a-stick' method of inter-VLAN routing?

The 'router-on-a-stick' method of inter-VLAN routing does not scale beyond 50 VLANs.

How are subinterfaces configured in the 'router-on-a-stick' inter-VLAN routing method?

<p>Subinterfaces are configured in software on a router and are associated with a single physical Ethernet interface. Each subinterface is independently configured with an IP address and VLAN assignment, and are configured for different subnets that correspond to their VLAN assignment.</p> Signup and view all the answers

Explain the steps to configure a Layer 3 switch with VLANs and trunking for inter-VLAN routing.

<p>The steps include creating VLANs, creating SVI VLAN interfaces, configuring access ports, and enabling IP routing.</p> Signup and view all the answers

What is the benefit of using a Layer 3 switch for inter-VLAN routing over the router-on-a-stick method?

<p>Inter-VLAN routing using a Layer 3 switch is simpler to configure than the router-on-a-stick method.</p> Signup and view all the answers

How is a routed port configured on a Layer 3 switch to enable routing?

<p>A routed port must be configured by disabling the switchport feature on a Layer 2 port.</p> Signup and view all the answers

In what scenario would you need to troubleshoot inter-VLAN routing on a Layer 3 switch?

<p>Troubleshooting inter-VLAN routing involves verifying subinterface status and VLAN assignments.</p> Signup and view all the answers

What does the OSPF routing protocol domain involve when connecting a Layer 3 switch to a router?

<p>Layer 3 switch D1 is connected to R1, both in an OSPF routing protocol domain, and OSPF configuration commands will be given in activities and assessments.</p> Signup and view all the answers

What are the key focuses of the Packet Tracer activity related to inter-VLAN routing?

<p>Packet Tracer activity focuses on locating network problems, implementing the solution, and verifying network connectivity.</p> Signup and view all the answers

What is the main objective of the Troubleshoot Inter-VLAN Routing Lab?

<p>The Troubleshoot Inter-VLAN Routing Lab involves building the network, loading device configurations, troubleshooting the Inter-VLAN Routing Configuration, verifying VLAN Configuration, Port Assignment, and Trunking, and testing Layer 3 Connectivity.</p> Signup and view all the answers

How does the text conclude?

<p>The text ends with a module practice and quiz.</p> Signup and view all the answers

What must be done to enable routing on a Layer 3 switch?

<p>To enable routing on a Layer 3 switch, a routed port must be configured by disabling the switchport feature on a Layer 2 port.</p> Signup and view all the answers

What must be created for each of the routable VLANs on a Layer 3 switch?

<p>A Layer 3 SVI must be created for each of the routable VLANs.</p> Signup and view all the answers

What is the configuration used to create SVIs for inter-VLAN routing on a Layer 3 switch?

<p>SVIs are configured using the same command as used to create the management SVI on a Layer 2 switch.</p> Signup and view all the answers

What is the connection scenario involving Layer 3 switch D1 and hosts PC1 and PC2?

<p>Layer 3 switch D1 is connected to two hosts on different VLANs: PC1 in VLAN 10 and PC2 in VLAN 20.</p> Signup and view all the answers

What is inter-VLAN routing?

<p>Inter-VLAN routing is the process of forwarding network traffic from one VLAN to another VLAN.</p> Signup and view all the answers

What are the three options for implementing inter-VLAN routing?

<p>The three options are legacy, router-on-a-stick, and Layer 3 switch using SVIs.</p> Signup and view all the answers

What are the steps to configure a switch with VLANs and trunking?

<p>The steps include creating and naming the VLANs, creating the management interface, configuring access ports, and configuring trunking ports.</p> Signup and view all the answers

How is a subinterface created for each VLAN in the router-on-a-stick method?

<p>A subinterface is created using the $interface\ interface_id\ subinterface_id$ global configuration mode command.</p> Signup and view all the answers

What must be done to enable a physical interface after creating subinterfaces in the router-on-a-stick method?

<p>The physical interface must be enabled using the $no\ shutdown$ interface configuration command.</p> Signup and view all the answers

What do Layer 3 switches use to provide inter-VLAN routing?

<p>Layer 3 switches use switched virtual interfaces (SVIs).</p> Signup and view all the answers

How are SVIs configured on Layer 3 switches?

<p>SVIs are configured using the $interface\ vlan\ vlan-id$ command.</p> Signup and view all the answers

What is a routed port on a Layer 3 switch?

<p>A routed port is created by disabling the switchport feature on a Layer 2 port that is connected to another Layer 3 device.</p> Signup and view all the answers

What could be reasons for inter-VLAN configuration issues?

<p>Reasons include missing VLANs, switch trunk port issues, switch access port issues, and router configuration issues.</p> Signup and view all the answers

What is a common cause of issues in a legacy inter-VLAN solution?

<p>A common cause is a misconfigured switch port, which could occur when the connecting router port is not assigned to the correct VLAN.</p> Signup and view all the answers

What is the most common cause of issues in a router-on-a-stick solution?

<p>The most common cause is a misconfigured trunk port.</p> Signup and view all the answers

How can problems with switch access port configuration be identified?

<p>Use ping and show interfaces interface-id switchport commands to identify the problem.</p> Signup and view all the answers

Explain the advantages of using Layer 3 switches for inter-VLAN routing over routers, and the main disadvantage of Layer 3 switches.

<p>Advantages include faster hardware switching and routing, no need for external links to the router, and increased bandwidth using Layer 2 EtherChannels. The main disadvantage is that Layer 3 switches are more expensive than routers.</p> Signup and view all the answers

What is the difference between SVI and Router-on-a-Stick methods of inter-VLAN routing?

<p>SVI uses virtual interfaces on a Layer 3 switch to provide Layer 3 processing for packets, while Router-on-a-Stick involves logically dividing a router interface into subinterfaces to route between VLANs.</p> Signup and view all the answers

What are the key steps involved in configuring a Layer 3 switch with VLANs and trunking for inter-VLAN routing?

<p>The key steps involve creating and naming VLANs, creating the management interface, configuring access ports, configuring trunking ports, and configuring SVIs for inter-VLAN routing.</p> Signup and view all the answers

How do Layer 3 switches use hardware-based switching to provide higher-packet processing rates than routers?

<p>Layer 3 switches use hardware-based switching to convert a Layer 2 switchport to a Layer 3 interface, allowing for higher-packet processing rates.</p> Signup and view all the answers

In what scenario would you need to troubleshoot inter-VLAN routing on a Layer 3 switch, and what are the potential issues?

<p>Troubleshooting may be needed if devices in different VLANs cannot communicate. Potential issues include misconfigured SVIs, trunking, or VLANs, and incorrect routing settings.</p> Signup and view all the answers

What are the main steps involved in the Router-on-a-Stick method of inter-VLAN routing, and what needs to be configured on both switches and the router?

<p>The main steps involve creating a subinterface for each VLAN to be routed, configuring it with encapsulation settings and IP address, and enabling the physical interface. Switches need to be configured with VLANs and trunking, and the router must be configured for inter-VLAN routing.</p> Signup and view all the answers

How do Layer 3 switches provide inter-VLAN routing using SVIs, and why is this method considered faster and more scalable for large enterprise networks?

<p>Layer 3 switches use SVIs to route from one VLAN to another, and this method is considered faster and more scalable due to hardware-based switching and the ability to use multiple SVIs for routing between VLANs.</p> Signup and view all the answers

What is the main limitation of the 'router-on-a-stick' method of inter-VLAN routing, and how does it compare to Layer 3 switches in terms of scalability?

<p>The main limitation is the need to create a subinterface for each VLAN, which can become complex and less scalable for large networks. In contrast, Layer 3 switches can scale more effectively using SVIs for inter-VLAN routing.</p> Signup and view all the answers

How are subinterfaces configured in the 'router-on-a-stick' inter-VLAN routing method, and what settings need to be configured for each subinterface?

<p>Subinterfaces are configured by logically dividing a router interface, and each subinterface needs to be configured with encapsulation settings and an IP address for routing between VLANs.</p> Signup and view all the answers

What are the key differences between Layer 3 switches and routers in the context of inter-VLAN routing, and why are Layer 3 switches more commonly deployed in campus LANs?

<p>Layer 3 switches provide faster hardware switching and routing, do not require external links to the router, and can use Layer 2 EtherChannels for increased bandwidth. They are more commonly deployed in campus LANs due to these advantages, despite being more expensive than routers.</p> Signup and view all the answers

What are the advantages of using Layer 3 switches for inter-VLAN routing over the 'router-on-a-stick' method, and how do SVIs contribute to the efficiency of Layer 3 switches in this context?

<p>Advantages include faster hardware switching and routing, no need for external links to the router, and increased bandwidth using Layer 2 EtherChannels. SVIs contribute to the efficiency by providing a faster and more scalable method for inter-VLAN routing using hardware-based switching.</p> Signup and view all the answers

Study Notes

Inter-VLAN Routing using Layer 3 Switches

  • SVIs are configured using the same command as used to create the management SVI on a Layer 2 switch
  • A Layer 3 SVI must be created for each of the routable VLANs
  • Layer 3 switch D1 is connected to two hosts on different VLANs: PC1 in VLAN 10 and PC2 in VLAN 20
  • Steps to configure Layer 3 switch S1 with VLANs and trunking include creating VLANs, creating SVI VLAN interfaces, configuring access ports, and enabling IP routing
  • Inter-VLAN routing using a Layer 3 switch is simpler to configure than the router-on-a-stick method
  • To enable routing on a Layer 3 switch, a routed port must be configured by disabling the switchport feature on a Layer 2 port
  • Layer 3 switch D1 is connected to R1, both in an OSPF routing protocol domain, and OSPF configuration commands will be given in activities and assessments
  • Steps to configure D1 to route with R1 include configuring the routed port, enabling routing, configuring routing, verifying routing, and verifying connectivity
  • Troubleshooting inter-VLAN routing involves verifying subinterface status and VLAN assignments
  • Packet Tracer activity focuses on locating network problems, implementing the solution, and verifying network connectivity
  • Troubleshoot Inter-VLAN Routing Lab involves building the network, loading device configurations, troubleshooting the Inter-VLAN Routing Configuration, verifying VLAN Configuration, Port Assignment, and Trunking, and testing Layer 3 Connectivity
  • The text ends with a module practice and quiz.

Inter-VLAN Routing Methods in Networking

  • Inter-VLAN routing is commonly performed using Layer 3 switches and switched virtual interfaces (SVI).
  • SVI is a virtual interface configured on a Layer 3 switch, providing Layer 3 processing for packets sent to or from switch ports associated with a VLAN.
  • Advantages of using Layer 3 switches for inter-VLAN routing include faster hardware switching and routing, no need for external links to the router, and increased bandwidth using Layer 2 EtherChannels.
  • Layer 3 switches are more commonly deployed in campus LANs than routers, but they are more expensive.
  • Router-on-a-Stick inter-VLAN routing involves logically dividing a router interface into subinterfaces to route between VLANs.
  • To enable devices to ping each other in Router-on-a-Stick scenario, switches need to be configured with VLANs and trunking, and the router must be configured for inter-VLAN routing.
  • S1 VLAN and trunking configuration involves creating and naming VLANs, creating the management interface, configuring access ports, and configuring trunking ports.
  • S2 VLAN and trunking configuration is similar to S1.
  • Router-on-a-Stick method requires creating a subinterface for each VLAN to be routed, configuring it with encapsulation settings and IP address, and enabling the physical interface.
  • Layer 3 switches use hardware-based switching to provide higher-packet processing rates than routers and are commonly implemented in enterprise distribution layer wiring closets.
  • Layer 3 switches can route from one VLAN to another using multiple SVIs and convert a Layer 2 switchport to a Layer 3 interface.
  • To provide inter-VLAN routing, Layer 3 switches use SVIs as a method that is faster and more scalable for large enterprise networks.

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