Therefore, to send traffic from one VLAN to another VLAN, you also route it. This is easy to remember if you recall that a VLAN = a subnet and to send traffic from one subnet to another you route it. Troubleshooting a Router-on-a-Trunk/Stickįor traffic to pass from one VLAN to another VLAN, it has to be routed.
Which EtherChannel flag indicates that the port is bundled in the EtherChannel bundle? Which EtherChannel modes will successfully form an LACP EtherChannel?ġ0. What flags in the show etherchannel summary output indicate that the EtherChannel is Layer 3 and in use?ĩ. show interfaces gigabitethernet 1/0/10 switchportĨ. Which show command enables you to verify whether interface Gigabit Ethernet 1/0/10 is a Layer 2 switchport or a routed port?Ī. Which command enables you to convert a Layer 2 switchport to a routed port?ħ. Which command enables IPv4 unicast routing on a Layer 3 switch?Ħ. Which show command enables you to verify the status of the SVI for VLAN 10 and the MAC address associated with it?ĥ. IP routing must be enabled on the switch.Ĥ. There must be at least one interface on the switch associated with the VLAN in the spanning-tree forwarding state.ĭ. The VLAN associated with the SVI must exist on the switch.Ĭ. What must be true for an SVI to be up/up? (Choose two answers.)Ī. Which show command enables you to verify the VLAN that has been associated with a router subinterface?ģ. Which command enables you to associate a VLAN with a router subinterface?Ģ. Table 6-1 “Do I Know This Already?” Section-to-Question Mappingġ. You can find the answers in Appendix A, “ Answers to the ‘Do I Know This Already?’ Quizzes.” Table 6-1 lists the major headings in this chapter and their corresponding “Do I Know This Already?” quiz questions. If you are in doubt about your answers to these questions or your own assessment of your knowledge of the topics, read the entire chapter. The “Do I Know This Already?” quiz allows you to assess whether you should read this entire chapter thoroughly or jump to the “ Exam Preparation Tasks” section.
You will also be exposed to a few different troubleshooting scenarios for each.
This chapter focuses on how you can troubleshoot different inter-VLAN routing implementations, routed ports, and Layer 3 EtherChannel. In addition, you can use routed ports to create Layer 3 EtherChannels. Through the use of virtual Layer 3 interfaces (known as switched virtual interfaces ) or by converting a Layer 2 switchport to a routed port, you can assign IP addresses to these interfaces and have the Layer 3 switch route data between VLANs and subnets. Of the Layer 3 services, routing is the most common that is implemented. These Layer 3 switches can perform both Layer 2 and Layer 3 services. However, many Cisco Catalyst switches are Layer 3 switches. These switches operate at Layer 2 of the OSI model, forwarding or flooding frames based on the MAC addresses in the frame. Layer 3 EtherChannel Trouble Tickets: This section provides trouble tickets that demonstrate how you can use a structured troubleshooting process to solve a reported problem.Ĭhapters 4, “ Troubleshooting Layer 2 Trunks, VTP, and VLANs,” and 5, “ Troubleshooting STP and Layer 2 EtherChannel,” focused on Cisco Catalyst switches as Layer 2 switches. Troubleshooting Layer 3 EtherChannel: This section focuses on the steps needed to successfully troubleshoot a Layer 3 EtherChannel that relies on routed ports. Routed Port Trouble Tickets: This section provides trouble tickets that demonstrate how you can use a structured troubleshooting process to solve a reported problem. Troubleshooting Routed Ports: This section reviews what is necessary to convert a Layer 2 switchport into a routed port. SVI Trouble Tickets: This section provides trouble tickets that demonstrate how you can use a structured troubleshooting process to solve a reported problem.
You will also learn how to troubleshoot issues related to SVIs. Troubleshooting Switched Virtual Interfaces: This section identifies what is necessary for an SVI to be up/up and provide inter-VLAN routing. Router-on-a-Trunk/Stick Trouble Tickets: This section provides trouble tickets that demonstrate how you can use a structured troubleshooting process to solve a reported problem. Troubleshooting a Router-on-a-Trunk/Stick: This section covers how to troubleshoot inter-VLAN routing issues when using the router-on-a-trunk scenario. This chapter covers the following topics: Troubleshooting Inter-VLAN Routing and Layer 3 EtherChannels Troubleshooting Cisco Catalyst Switch Features Chapter 6. CCNP Routing and Switching TSHOOT 300-135 Official Cert Guide (2015) Part II.