#Router on a stick inter vlan routing how to#
#Router on a stick inter vlan routing verification#

The output confirms the IPv4 address and default gateway of PC1. It is a good idea to first verify the current host IP configuration using the ipconfigР’В Windows host command. The configuration can be verified from the hosts, router, and switch.Р”Р‡rom a host, verify connectivity to a host in another VLAN using the pingР’В command. The router-on-a-stick configuration is complete after the switch trunk and the router subinterfaces have been configured. R1# Verify Connectivity Between PC1 and PC2 *Sep 15 19:08:51.071: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/0/1, changed state to up *Sep 15 19:08:50.071: %LINK-3-UPDOWN: Interface GigabitEthernet0/0/1, changed state to up *Sep 15 19:08:47.015: %LINK-3-UPDOWN: Interface GigabitEthernet0/0/1, changed state to down R1(config-if)# description Trunk link to S1 R1(config-subif)# description Default Gateway for VLAN 99 R1(config-subif)# description Default Gateway for VLAN 20 R1(config-subif)# description Default Gateway for VLAN 10 Router-on-a-Stick Example R1(config)# interface G0/0/1.10 In the following configuration, the R1 G0/0/1 subinterfaces are configured for VLANs 10, 20, and 99. If the physical interface is disabled, all subinterfaces are disabled. When all subinterfaces have been created, enable the physical interface using the no shutdownР’В interface configuration command. Each router subinterface must be assigned an IP address on a unique subnet for routing to occur. Repeat the process for each VLAN to be routed. This address typically serves as the default gateway for the identified VLAN. ip address ip-address subnet-maskР’В РІР‚вЂњ This command configures the IPv4 address of the subinterface.The nativeР’В keyword option is only appended to set the native VLAN to something other than VLAN 1. encapsulation dot1q vlan_id Р’В РІР‚вЂњР’В This command configures the subinterface to respond to 802.1Q encapsulated traffic from the specified vlan-id.Although not required, it is customary to match the subinterface number with the VLAN number.Р”В®ach subinterface is then configured with the following two commands: The subinterface syntax is the physical interface followed by a period and a subinterface number. The router-on-a-stick method requires you to create a subinterface for each VLAN to be routed.Р”Р„ subinterface is created using the interface interface_id subinterface_idР’В global configuration mode command. *Mar 1 00:23:52.137: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to up R1 Subinterface Configuration Router-on-a-Stick Example S2(config)# vlan 10 The configuration for S2 is similar to S1. Only S1 and S2 can pingР’В each other, but they but are unreachable by PC1 or PC2 because they are also on different networks. Currently, PC1 and PC2 cannot pingР’В each other because they are on separate networks. The table also shows the three VLANs that will be configured on the switches.Р”Р„ssume that R1, S1, and S2 have initial basic configurations. To route between VLANs, the R1 GigabitEthernet 0/0/1 interface is logically divided into three subinterfaces, as shown in the table. These are trunk links that are required to forward traffic within and between VLANs. The S1 FastEthernet 0/1 port is connected to the S2 FastEthernet 0/1 port. In the figure, the R1 GigabitEthernet 0/0/1 interface is connected to the S1 FastEthernet 0/5 port. You can see in the figure that the router is not in the center of the topology but instead, appears to be on a stick near the border, hence the name.

#Router on a stick inter vlan routing how to#

This topic details how to configure router-on-a-stick inter-VLAN routing. In the previous topic, three different ways to create inter-VLAN routing were listed, and legacy inter-VLAN routing was detailed.

Lab РІР‚вЂњ Configure Router-on-a-Stick Inter-VLAN Routing.

Packet Tracer РІР‚вЂњ Configure Router-on-a-Stick Inter-VLAN Routing.

#Router on a stick inter vlan routing verification#

Router-on-a-Stick Inter-VLAN Routing Verification.Verify Connectivity Between PC1 and PC2.