Intervlan routing using a router on a stick module

#Intervlan routing using a router on a stick module install#
#Intervlan routing using a router on a stick module Pc#

VLANs 10 and 20 have also been added to switch SW1. The Router R1 is connected to switch SW1 on trunk port F0/3. Let us configure the setup shown in the diagram given below. The router may use routing table to forward data to the correct device, if the destination address is on adifferent VLAN. To do this, you need to configure IP addresses on the router interfaces, which would be used by computers on VLAN 10 and VLAN 20 to accessthe devices connected to each other. The router will accept the tagged VLAN traffic on its trunk interface and route traffic between different VLANs. Let us create a Router on stick setup where a single router interface is configured as a trunk link. To configure Router on stick inter-VLAN mechanism,you need to configure the routerвЂ™s interfaces as trunk links. You can configure multiple VLANs on a single interface using Router on stick inter-VLAN mechanism. In this setup, you are configuring each VLAN on a separate router interface.

#Intervlan routing using a router on a stick module Pc#

Also, PC 1 is configured on VLAN 10 and PC 2 is configured on VLAN 20. The switch ports Fa0/4 and Fa0/3, which are also the part of VLANs 10 and 20 respectively, are configured to router interfaces. The Switch SW1 has two VLANs VLAN 10 and VLAN 20 configured on interfacesFa/08 and Fa0/11 respectively. The following figure explains the scenario. The router accepts traffic on its interface from one VLAN through switch and routes the traffic to another VLAN. In a traditional inter-VLAN routing setup, each router interface is connected to a separate network through a switch port, which is also associated with a specific VLAN. To allow communication between different VLANs you can configure inter-VLAN routing between them. > Configure and verify interVLAN routing (Router on a stick)Д¬onfigure and verify interVLAN routing (Router on a stick)Д®xam: Cisco 200-301 - Cisco Certified Network Associate (CCNA)Д«y default the devices on the same VLAN only can communicate with each other.Restart the Networking service: sudo /etc/init. ( Optional): If the Ubuntu router didnвЂ™t load the 8021q kernel module at boot time, then use this command to add the module to the kernel on boot: sudo su -c 'echo '8021q' > /etc/modules' Now we shall configure the vlans on Ubuntu router by editing the /etc/network/interfaces: sudo nano /etc/network/interfaces

#Intervlan routing using a router on a stick module install#

To install the vlan support on ubuntu, use this command: sudo apt-get install vlan Router: Ubuntu Server with 1 network card.Д¬isco 2960 Switch Configuration: interface FastEthernet0/1 description CONNECTED TO UBUNTU ROUTER switchport mode trunk ! ! ! interface FastEthernet0/5 description WINXP-1 switchport access vlan 10 switchport mode access ! interface FastEthernet0/6 description WINXP-2 switchport access vlan 10 switchport mode access ! ! ! interface FastEthernet0/15 description UBUNTU CLIENT switchport access vlan 20 switchport mode access ! interface FastEthernet0/16 description CentOS CLIENT switchport access vlan 20 switchport mode access Ubuntu Router Configuration:.To forward the traffic between the vlans, we should configure the iptables: sudo nano /etc/sysconfig/iptablesДЄdd these two lines (place them according to your iptables file configuration): -A FORWARD -i vlan10 -o vlan20 -m state -state NEW,RELATED,ESTABLISHED -j ACCEPT -A FORWARD -i vlan20 -o vlan10 -m state -state NEW,RELATED,ESTABLISHED -j ACCEPT Use the ifconfig command to check the newly created vlan interfaces: ifconfig Restart the Networking service: sudo service network restart To enable ip forwarding, edit /etc/nf file: sudo nano /etc/nf Ifcfg-vlan20В should haveВ followingВ elements: Ifcfg-vlan10В should haveВ followingВ elements:ДЄgain to setup a VLAN20, on eth0, then we should create aВ file ifcfg-vlan20В inside /etc/sysconfig/network-scripts/: To setup a VLAN10, on eth0, then we should create aВ file ifcfg-vlan10 inside /etc/sysconfig/network-scripts/ :

It should haveВ at leastВ the following elements: DEVICE=eth0 BOOTPROTO=none #if it didnвЂ™t work then use static ONBOOT=yes TYPE=Ethernet To configure the base interface(in my case, eth0): sudo nano /etc/sysconfig/network-scripts/ifcfg-eth0

Clients: 2 WindowsXP in VLAN10,1 Ubuntu and 1 CentOS in VLAN20.Д¬isco 2960 Switch Configuration: interface FastEthernet0/1 description CONNECTED TO CentOS ROUTER switchport mode trunk ! ! ! interface FastEthernet0/5 description WINXP-1 switchport access vlan 10 switchport mode access ! interface FastEthernet0/6 description WINXP-2 switchport access vlan 10 switchport mode access ! ! ! interface FastEthernet0/15 description UBUNTU CLIENT switchport access vlan 20 switchport mode access ! interface FastEthernet0/16 description CentOS CLIENT switchport access vlan 20 switchport mode access CentOS Router Configuration:ДЇirst, we need to disable the SELinux: sudo nano /etc/selinux/configД¬hange SELINUX from enforcing to disabled:.

Router: CentOS Server with 1 network card.