200-301 pluralsight

200-301 pluralsight.This example focuses on how to connect a router to a subnet of multiple VLANs in the same campus LAN. Most sites in corporate LANs today use at least two VLANs. one of the following two options is typically used for the routing to work properly.Single-armed router (ROAS): The router is connected to the LAN and one of its physical interfaces is configured for VLAN trunking. This router has IP addresses in each subnet and one subnet for each VLAN. The router is configured to add each matching subnet and the associated VLAN to the subinterface.Layer 3 Switch: also called a multilayer switch, a Layer 3 switch does the same job as a router using ROAS, but this switch has a built-in roadBy Function. The switch configuration adds each matching subnet and the associated VLAN to the VLAN interface. This example happens to use ROAS, but many of the errors that occur here can also occur with Layer 3 switch configurations. First, this list below highlights the rules for configuring ROAS on the router and adjacent switches, using 802.1Q. Backup 20,Step 1 On the router, for each non-local VLAN, do the following. SiS a.Create a unique subinterface (interface type number.subint) for each VLAN that needs to be routed.b.Start 802. IQ, in subinterface config mode, and associate the subinterface with a specific VLAN (encapsulationdotlqvlan-id) oc.Configure the IP settings (address and mask) in subinterface config mode (ip address address mask). Step 2 On the router. for the local VLAN. use one of the following two options if you want to use this VLAN.a. just like configuring other VLANs, except add the encapsulation command to the native keyboard (encapsulationdot1qvlan-idnative) ob. configure the IP address on the physical LAN interface without the subinterface and encapsulation dotlq commands. Step 3 On the switch, enable trunking (because the router does not negotiate to start 802.1Q trunking).a.Use the switchportmodetrunk interface subcommand to start trunking.