What Is A Disadvantage Of Using Router-On-A-Stick Inter-Vlan Routing?
Share
Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
What is the disadvantage of using router-on-a-stick inter-VLAN routing?
Answer: The main disadvantage of using router-on-stick inter-VLAN is that beyond 50 VLANs it does not scale. The router gets VLAN-tagged packets and transfers the VLAN-tagged packets to the destination.it can use a single router interface like the trunk link to obtain and move the VLAN traffic and does not need multiple interfaces.
The switches divide the broadcast domain with the help of the VLAN, they are not able to transfer the packets by themselves across the VLAN. To make the communication among the VLAN we need the inter VLAN Routing.
Inter VLAN routing is the method to make different communication among different VLANs regardless of VLANs location (on the same switch or different) .it is accessible with a 3-layer device like the router or layer-3 switch. The whole process when the inter VLAN routing occurs through the router is referred to as the router-on-stick. The router interface is divided into sub-interfaces and functions as the default gateway of the corresponding VLANs.
Let’s take a look at the example, a topology with the router, switches, and end-host and two VLANs are formed on the switch, and there are two sub-interfaces of the router, that will act as the gateway. The router handles routing between VLANs which in turn helps the VLANs in communications. First, allocate the IP addresses to both the PC and server as for PC1 it is 192.168.1.10/24, Server 192.168.1.20/24, and IP address 192.168.2.10/24 is assigned to PC2. On a port, the sub-interfaces are formed of fa0/0 as fa0/0.1 and fa0/0.2 after it the sub-interfaces are created and, on the routers, ports the IP addresses are assigned as 192.168.1.1/24 and 192.168.2.1/24
r1# int fa0/0.1
r1# encapsulation dot1q 2
r1# ip address 192.168.1.1 255.255.255.0
r1# int fa0/0.2
r1# encapsulation dot1q 3
r1# ip address 192.168.2.1 255.255.255.0