TechKnowSurge

Cisco CCNA 3.3 Cisco CCNA 3.1 Cisco CCNA 3.2

VideoNetworkFree

DEMO: RIP

Covers the CLI commands needed to enable and disable RIP version 2 on a Cisco router, including how to configure network statements so the router begins exchanging routing updates with neighboring devices.

⚑ Complete this video to capture a CTF flag worth 1 point.

About this video

RIP version 2 configuration on a Cisco router requires more than simply enabling the protocol — a properly scoped network statement is essential before the router will send or receive any routing updates. In this scenario, a Layer 3 switch is already running RIP and broadcasting updates, but the adjacent router is ignoring them because RIP has not been configured on that device. The goal is to bring that router into the RIP domain so routes propagate between the two devices. The configuration begins in global configuration mode with the router rip command, followed by version 2 to specify RIPv2. A network statement using the classful address 10.0.0.0 is then applied, which serves a dual purpose: it identifies which interfaces will participate in RIP and determines which networks will be advertised to neighbors. As soon as the network statement is entered, the routing table updates immediately — verified by running show ip route and observing newly populated RIP routes marked with the letter R. Connectivity is confirmed through a continuous ping to a remote interface address, which transitions from failing to succeeding the moment RIP converges. The demonstration concludes by removing the entire RIP configuration using no router rip, which causes the ping to fail again as the learned routes are withdrawn. One practical note worth highlighting is that this configuration is performed via a console connection rather than SSH, since disabling RIP over an SSH session would terminate the connection before the commands could be completed.

What you'll learn

Configure RIPv2 on a Cisco router using the appropriate global configuration commands, including enabling the routing process, specifying the version, and defining network statements
Verify RIPv2 route propagation using the show ip route command and interpret RIP-learned routes in the routing table

What's covered

Configuring RIP on Router

Network Overview
- Layer 3 Switch
  - RIP already enabled
- Router 1
  - Not listening to RIP
- Test Ping 10.240.2.2
Verification Commands
- Show IP Route
  - Directly connected networks
  - R = RIP learned routes
Enabling RIP
- Global config mode
- Router RIP command
- Version 2
- Network 10.0.0.0 statement
  - Advertises networks
  - Activates interfaces
Disabling RIP
- No router RIP command
- Console vs SSH warning

Aligned to

Cisco CCNA

3.3 Configure and verify IPv4 and IPv6 static routing

3.1 Interpret the components of routing table

3.2 Determine how a router makes a forwarding decision by default

Key terms

Router: A network device that forwards data packets between networks based on IP addresses.
Routing Protocol: A protocol used by routers to communicate and share routing information to determine the best path for data.
RIPv2: Version 2 of the Routing Information Protocol, a distance-vector routing protocol that supports classless routing and sends updates to the multicast address 224.0.0.9.
Network Statement: A configuration command used in a routing protocol process to specify which directly connected networks should be advertised and which interfaces should participate in routing updates.
Routing Table: A database stored in a router that lists known network destinations, the metric (cost) to reach them, and the next-hop address or outgoing interface to forward packets toward those destinations. Routers consult this table for every packet they forward.
show ip route: A Cisco IOS command that displays the routing table, showing known networks and the paths used to reach them.

Topics

Ripv2 Dynamic Routing Cisco Ios Routing Protocols Networking Cli Configuration

Transcript

The Setup

This is the network that we're working with. This layer 3 switch already has RIP turned on, which means it's sending out updates out its interface, and router 1 is technically receiving those RIP updates - it's just not listening for those updates and it's ignoring them. What we're going to do is enter the commands that I entered onto layer three, we're going to enter those same commands on this router 1, so it starts listening to those routing updates, those RIP updates.

I'm right now pinging 10.240.2.2, which is the far end of this router, this interface right here. So that's just a way for us to test. Once the routes have populated amongst these two devices, then we'll be able to see that it comes through with this continuous ping that I have down here.

Looking at the Routing Table First

So let's take a look at the commands. The first thing that I'm going to do is do a show IP route and let's take a look at the routing table. Here we can see that we have several directly connected networks, so this is a directly connected network, and these are the actual interfaces. So here's the 10.240.0.2, here's this local link right here, which is 10.240.2.2 - so that's the one I'm pinging down here.

Entering the Commands

What commands do we enter? Well, first of all we've got to get into the global configuration mode, and router is the command, and we're going to do router rip. So we're turning RIP on with this, and we're going to actually use version two.

So RIP at that point in time is turned on for version two, but there's no network statement, so it's actually still not listening, it's still not taking anything in. We have to have a network statement for this to work.

So I'm going to do 10.0.0.0. Any networks that fall into that range are going to be broadcasted out, but also any interfaces that fall in that network range, those are the interfaces they'll be sent out. If you didn't catch that, don't worry, we're going to cover that again. But this network statement is both what is being broadcasted out and what interfaces are listening and being broadcasted out on.

I'm going to hit enter with this, and as soon as I hit enter I'm going to do a show IP route again. You can already see that it's pinging down here, so I'm getting that information. And I now have quite a few more routes populated with the R, because the R stands for RIP, and I can see right there R is for RIP.

So there you have it, now it is communicating across this network and we're getting data that's being sent back and forth.

Removing It

If I want to remove this, all I have to do is go into the global configuration mode and do no router rip, and I'll enter that in.

By the way, I'm consoled into this device, because if I were SSH'd into the device then I would break my connectivity and wouldn't be able to enter in these commands.

So there you have it, now I'm not able to ping that 10.240.2.2.

Read the full transcript Show less

About TechKnowSurge

TechKnowSurge builds IT and cybersecurity professionals through hands-on, concept-first training built around real understanding — not memorization. Free interactive tools, structured programs, and 25+ years of real-world experience, all in one place.

Explore free tools and programs →