GNS3 switching setup and options Part 4: Etherswitch Router for Cisco Dynamips Part 1

Key Takeaways

[Music] this is one of multiple videos discussing switching options available in gns3 in previous videos which I've linked below I discussed Cisco IOS avi layer 2 which is the recommended way of implementing switching with gns3 I've also discussed the junus three built-in switch in this video I'm going to demonstrate the ether switcher module which is a module that you insert into routers to provide switching capability so here's an example of a 3745 router with an ether they come in different sizes and are available for different routed types such as the twenty six hundred thirty six hundred thirty seven hundred and other routers here's an example of an nm e SW sixteen port module available on ebay so you could buy a physical module such as this and insert it into a physical router but what we going to do is use an ether switch module virtually in gns3 now ether switch modules provide switching capability in routers so as an example you could have a 3600 series router at a remote site and then provide power to IP phones so essentially rather than having a layer 3 switch which is a switch providing running capabilities here you've got a router providing switching capabilities so once again these are Network modules so that you insert in a router now as always a good place to go for information is the documentation page if you search for iOS one of the hits is Cisco IOS images for dynamics now this document explains a lot about the images available for diner maps but one of the last parts of this document discusses Cisco Catalyst switches so we told that it's not possible to emulate catalyst switches with dynamics this is because of ASIC restrictions if you want advanced switching options you should use an iou layer to image or iOS avi layer to image the recommendation today is to use iOS V layer 2 however if you want to use Dyna Maps because let's say for example you don't have access to an iOS ve layer to image you can use dinah maps with 2636 hundreds and 3700 series routers so you may only have access to a Cisco IOS image you can use the ether switch module with dinah maps and gin is 3 but you need to remember that this module works differently to a standard Ethernet switch so some commands are different VTP doesn't work necessarily in the same way it doesn't support many features so as an example dhcp snooping is not supported dynamic ether channel is not supported multiple spanning tree is not supported rapid spanning tree is not supported LACP is not supported and many other options such as private VLANs port security and others are not supported on this module however if you want to implement basic switching and all you have is a Cisco IOS image you could use the ether switch module with a twenty six hundred thirty six hundred or thirty seven hundred once again the best way to implement switching today with gns3 is to use Cisco IOS v layer two images but that being said let's look at how to configure an ether switch module with ingenious three and bold a basic topology with multiple VLANs in this example I'm using a Mac and gene is 32.0 the process however is very similar on Windows as well as genus 31.5 so go to genus 3 preferences Donna Maps and under the Dynomax heading select iOS writers in this example already have multiple 37:25 routers configured but what I'm going to do here is click new and create a new router on the gns3 VM but add the ether switch module to the router so I'm going to run it once again on the genus 3vm that's recommended on Windows and Mac you could run down a Maps locally but again I'm gonna run it on the genus 3vm so I'm going to click Next in this example I've already got a 37:25 image so I'm going to use an existing image you could also select a new image and browse for that image but I've already got 37:25 right is configured so I'm going to use the same image and click Next now this is the important checkbox notice the name of the rod is currently C 37:25 but when act check this option it changes to ether switch Radha I'm going to click Next for the specific Radha I need to configure 256 Meg of RAM you can check the minimum and maximum RAM requirements for your platform by clicking here which will take you to Cisco's website please see my other videos where I'll show you how to install and configure gns3 and will also explain this option so here I'm going to click Next so I've got an ether switch module installed in the Radha I could as an example add another one so I'll add two and click Next this router supports a WIC card so I could add some of those and click Next an idle PC value is very important make sure that one is selected if it's not click on idle PC finder to find an idle PC value click finish so the ether switch router has now been added to gns3 second click ok under switches I now have the ether switch router available and I could drag that to the workspace I'll zoom in here to make it easier to see and what I could do now is drag some routers into the topology what I'll do is configure the two riders on the left in one VLAN and configure that to rodders on the right in a different VLAN be careful with your interface numbers you need to make sure that the devices are connected to the right ports in other words to the ether switch ports and not to standard Ethernet ports on the router if you're not sure about the ports right-click on the router click configure click slots and as you can see here I've got the network module installed in slot one and another one installed in slot 2 so I don't want to connect the routers to slot 0 in other words I don't want to use Fast Ethernet 0 0 or 0 1 because they are not ether switch module interfaces those are router interfaces I could view the labels and make the diagram look pretty I'm not going to bother about doing that now but you could obviously make the diagram look nice I'm going to start up the devices in this example I'm using the routers as PC type devices I'll open up a console to the routers and the most important one for this discussion is the ether switch module notice when I login I'm told that this is a normal router with an ether in other words a 10 M 16 esw it has been pre-configured with hard-coded speed and duplex valleys to create VLANs use the command VLAN database in exact mode and after creating all the desired VLANs use exit to apply the configuration to view existing VLANs use the command show VLAN switch brief genus 3 also makes us easy because there are some alias commands that we can use such as VL which is the same as typing show VLAN switch brief so these macros have been created in configure mode we can use the commander of EAX to add a VLAN after the moment the show VLAN switch briefed command shows us that all ports are configured in VLAN 1 in other words all Ethernet ports on on the ether switch modules are in VLAN 1 here's our first ether switch module here's the second one so I could exit out of the router press ENTER again and I can see the commands to add a VLAN so confid that the VLAN has been created so the shortcut command is once again VL notice VLAN 2 now exists so I could use the command V a three to create VLAN 3 VL shows us that VLAN three has been created once again VL is a macro for this command show a VLAN switch brief so I'll paste that in and you can now see that feel and 3 and VLAN to exist on our ether switch module so in this topology fastethernet 1 0 and 1 1 are going to be put into one VLAN and Pastis turn at 1 2 and 1/3 are going to be put into a separate VLAN so con 40 interface F 1 / 0 switch port mode notice we don't have DTP or dynamic trunk protocol as an option so we'll use access here to specify that it's an access port and then switch port access a VLAN and I'll use two interface F 1 / 1 switch port access VLAN to show run in the output here you can see it's a rudder with an additional configuration added we also told that we shouldn't use Faust Ethernet 0 0 or Fast Ethernet is 0 1 now this Radha has some serial interfaces you may decide not to add that because she just want this to act as a switch in your topology but notice here fast ethernet 1 0 & 1 1 now belong to VLAN two so what I could do is go on to F 1/1 switch port access a VLAN 3 interface F 1/2 switch port access of the land 3 VL shows us our VLAN configuration so I made a mistake here so let me fix that interface F 1 / 1 should be in VLAN 2 and then 1/2 should be in 3 which is correct and 1 2 3 should be in 3 so VL again shows us that these two ports are in VLAN 2 which is correct per our diagram and these two ports belong to V land 3 which is correct I hope you've enjoyed this video if it was of benefit to you please like it and please subscribe to my youtube channel I wish you all the very best [Music]