InterVLAN routing Configuration

 InterVLAN routing Configuration

configuration they will talk or tranfrer data connected to all devices in same switch or in network.

but when in switch we create vlan then divided in to subdomain or subnetworks so without any 

By defaultin swithc there are one vlan and it's all ports are in same vlan so without any 

layer three device two diffrent vlant can not tranfer information or talk each other also they cant 

transfer information in other network.thay only can talk or transfer information which is in 

same vlan or same sub twork.

here we r doing inter vlan routing.Configuration of router for interVLAN routing 

   for when we wannt to talk 2 different vlan in network then intervlan routing is needed.

 appropriate VLANs back through the same line.

the packet goes to router first and the router will route the packets to the

For now lets configure the router to do interVLAN routing.

here we have cisco 2600 series router.it's have by default 2 ethernet interface

so we can connect through that port to our cisco switch.in on that port we devided in to

 sub interfaces  ,each interface for each vlan sapretely.we will give also sapret ip addresses 

to each interface,there are no need to give ip address on main interface .

  subinter face is  one port can be logically devided into many sub interfaces.

Each sub interface will handle one VLAN/subnet.

here we need to assign VLAN first on the sub interface, after that give IP 

address .no need to give IP address to main interface ethernet 0/0 but do not forget to give 

command no shut , the sub interfaces will automatically apply the same no shutdown.

here's how we configure them:

router> enable

router2600# configure terminal

router 2600(config)# interface ethernet0/0

router 2600(config-if)# no ip address

router 2600(config-if)# no shutdown

router 2600(config-if)# interface ethernet0/0.1

router 2600(config-subif)# encapsulation dot1q 2

router 2600(config-subif)# ip address 10.100.2.1 255.255.255.0

router 2600(config-subif)# interface ethernet0/1.2

router 2600(config-subif)# encapsulation dot1q 3

router2600 (config-subif)# ip address 10.100.4.1 255.255.255.0

router 2600(config-subif)# interface ethernet0/1.3

router 2600(config-subif)# encapsulation dot1q 4

router 2600(config-subif)# ip address 10.100.6.1 255.255.255.0

router 2600(config-subif)# interface ethernet0/1.5

router 2600(config-subif)# encapsulation dot1q 5

router 2600 (config-subif)# ip address 10.100.8.1 255.255.255.0

router 2600 (config-subif)#exit

router 2600 (config-t#exit

router 2600#wr

Posted in: Vlan