How to Add Layer 3 Switch in GNS3? – In our previous article, we added IOS image on GNS3. In this article, we will add and configure the Layer 3 Switch IOS image to GNS3. As you know, Layer 2 Switches only forward packets according to the MAC address table.
Layer 3 Switches use the MAC address table and additionally serve as IP forwarding. How to Add Layer 3 Switch in GNS3? Adding a Layer 3 Switch on GNS3 is almost identical to adding a in the GNS3 program. In order to perform Switching based operations with GNS3, you need to add a Layer 3 Switch on GNS3.
With Layer 3 Switches on GNS3, you can perform VLAN, 802.1Q Trunking and InterVLAN Routing. First run the program and click on the Edit menu. Step 2 From the Edit menu, click Preferences. Step 3 In the General Preferences window that opens, click the IOS Routers tab.
If your goal is to run GNS3, then you need to get the IOS images in an appropriate way. But, if you're trying to work with a lab setup, consider getting the actual physical gear. There are a lot of switches, routers, and firewalls out there that, although not the latest, are still quite functional. I downloaded it, but I need IOS images. I don't have. You can purchase VIRL for a couple hundred and use those images in GNS3.
Step 4 Previously we added the Layer 2 Switch from the Qemu VMs section. Adding Layer 3 Switch on GNS3 is done from this section. In the Cisco Router template window, click the New button. Step 5 In the IOS Image window, select the New Image option and click the Browse button. Step 6 Select the IOS you downloaded from the above button and click the Open button.
Step 7 If the GNS3 program asks if you want to copy IOS to the default image folder, click Yes. Step 8 Click Next to continue. Step 9 This is the most important step of adding Layer 3 Switch on GNS3.
You need to select “ This is an Ethernet Switch Router” here. Once you have selected this option, click Next to continue. Step 10 Leave the Layer 3 Switch’s RAM value as default and click Next. Step 11 In the Network Adapters window, select the NM-16ESW interface in Slot 0 and proceed to the next step. Step 12 Click the Idle-PC Finder button to select the most appropriate value for your computer’s CPU performance for the Layer 3 Switch IOS. Step 13 Wait while calculating the Idle-PC value.
Step 14 The most appropriate Idle-PC value for GNS3 Layer 3 Switch IOS has been determined. Click the OK button to continue. Step 15 As you can see in the image below, the Layer 3 Switch has been successfully added. Step 16 Drag and drop the Layer 3 Switch to the GNS3 workspace. Step 17 Create the topology as follows.
Double-click to test the GNS3 Layer 3 Switch. Step 18 We completed the process of adding GNS3 Layer 3 Switch. Now, in order to test the switch, apply the show vlan-switch command in the CLI command interface. Configure the GNS3 Layer 3 Switch by executing the following commands.
ESW1# conf t ESW1(config)#interface vlan 1 ESW1(config-if)#ip address 192.168.10.1 255.255.255.0 ESW1(config-if)#no shutdown ESW1(config-if)#exit ESW1(config)#infterface fastethernet0/0 ESW1(config-if)#no shutdown ESW1(config-if)#exit ESW1(config)#exit ESW1# Step 19 Configure on GNS3 and then ping the Vlan 1 interface to test the connection as follows. Step 20 You can see that the operation is successful when pinging each other on the VPCS. Layer 3 Switch is running smoothly.
GNS3 Layer 3 Switch Show Commands sutabs active=”1″ sutab title=”ESW1#show running-config” ESW1#show running-config Building configuration. Current configuration: 2035 bytes! Version 12.4 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption no service dhcp! Hostname ESW1! Boot-start-marker boot-end-marker!! No aaa new-model memory-size iomem 5 no ip routing no ip icmp rate-limit unreachable!! No ip cef no ip domain lookup!!
Ip auth-proxy max-nodata-conns 3 ip admission max-nodata-conns 3!! Vtp file nvram:vlan.dat!! Ip tcp synwait-time 5!!! Interface FastEthernet0/0 description. Unused for Layer2 EtherSwitch.! Interface FastEthernet0/1 description.
Unused for Layer2 EtherSwitch. shutdown! Interface FastEthernet0/2!
Interface FastEthernet0/3! Interface FastEthernet0/4! Interface FastEthernet0/5! Interface FastEthernet0/6! Interface FastEthernet0/7! Interface FastEthernet0/8!
Interface FastEthernet0/9! Interface FastEthernet0/10! Interface FastEthernet0/11! Interface FastEthernet0/12! Interface FastEthernet0/13! Interface FastEthernet0/14! Interface FastEthernet0/15!
Interface Vlan1 ip address 192.168.10.1 255.255.255.0 no ip route-cache! No ip http server no ip http secure-server! Ip forward-protocol nd!! No cdp log mismatch duplex!! Mgcp behavior g729-variants static-pt!!
Banner exec ^C. This is a normal Router with a SW module inside (NM-16ESW) It has been preconfigured with hard coded speed and duplex To create vlans use the command 'vlan database' from exec mode After creating all desired vlans use 'exit' to apply the config To view existing vlans use the command 'show vlan-switch brief' Warning: You are using an old IOS image for this router. Please update the IOS to enable the 'macro' command!. ^C! Line con 0 exec-timeout 0 0 privilege level 15 logging synchronous line aux 0 exec-timeout 0 0 privilege level 15 logging synchronous line vty 0 4 login!!
End ESW1# /sutab sutab title=”ESW1#show ip int br” ESW1#show ip int br Interface IP-Address OK?
In order to perform any router-based hands-on lab exercise in GNS3, first, you need to download ISO images for routers. After downloading IOS images, you need to add router IOS image in GNS3.
In the previous posts, we have discussed a lot about how to download and use GNS3. In this post, we will explain how to add IOS image in GNS3. We assume that you have already downloaded, the router IOS images for GNS3. If you have not yet done it, click the following link to download the Cisco IOS image for GNS3. Now, you need to add router IOS image in GNS3. To do so, you need to perform the following steps:.
In the GNS3 console, click Edit and select Preferences to open the Preferences window. Click Next to add a new router IOS image in GNS3, as shown in the following figure. In the IOS image page, select the New Image radio button, click Browse and select the router IOS image that you want to add in GNS3. In this case, e will use Cisco router c2691 IOS image.
Click Next to proceed, as shown in the following figure. In the Name and platform window, specify the name and platform for the IOS image and then click Next as shown in the following figure. In the Memory page, set the desired Default RAM size and then click Next as shown in the following figure.
In the Network adapters page, ensure that slot 0 is already listed and selected. Select the additional slots, if required, and then click Next as shown in the following figure. In the WIC modules page, select the WIC modules to add additional modules as per your requirement, and then click Next as shown in the following figure. On the Idle-pc page, click Finish and then click OK to close the Preferences window. In the GNS3 console, you can see that c2691 router is added.
Drag it to the work view area as shown in the following figure. Right-click on the added router and then select Start to start it. Open the console of the router as shown in the following figure and use it to perform the hands-on lab exercise in GNS3. That’s all you need to do to add router IOS image in GNS3. In this post, we have explained how to add IOS image in GNS3 and how to use routers in GNS3. Please let me know if you have stuck.
![Gns3 Gns3](/uploads/1/2/3/8/123847666/627513370.png)
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