Basic IPv6 addressing with Packet Tracer 6.0 - Part 1

all right let's do a packet tracer demonstration I'm using the new packet tracer 6.0 and I'm going to configure this simple network with ipv6 and get the host communicating with each other and configure the routers interfaces for ipv6 so first of all let's demonstrate ipv6 with these pcs here so if I click on PC one and I'll go over here to the IP configuration window and you can see now in packet tracer 6 we have the ability to configure ipv6 on our PC now by default the device already has a link local ipv6 address you can tell it's a link local address by the fact that it starts with this fe80 alright and the rest of these numbers were actually generated from the devices MAC address we can see this if we open up a command prompt and you can see I've already put the command in I'll just put it in one more time IP config slash all and you can tell right here physical address there is the MAC address and if you compare it with the link local address you'll notice that the numbers are included in here notice BD da de right BD D ad then in the center for to create the 64-bit interface ID portion of this address the fffe was inserted and then the front half of the MAC address 0 0 9 0 to 1 is put in the front portion except if you convert this portion to binary and you flip the 7th bit going from left to right this zero changes in the hex to a 2 so there's also a 7-bit switch that happens the result is you've got the link local address that's been generated from the devices let's say MAC address and that's what's happened in this case that's what we see here right so the link local address allows the device to communicate on the local network and any device on an ipv6 network needs to have a de minimum at least a link-local address right so let's see if it works and if it works we should be able to copy this address right copy so I copied the link local address here and if this works correctly and this device has a link local address and this device has a link local address and they're connected to a switch they should be able to communicate with each other on the local network using ipv6 and so I'll open up PC 2 and in PC 2 I'll go to the IP configuration window and you see it has a link local address also but I'm going to open up the command prompt and right here at the command prompt I'm going to type ping and then a space and then I'll right click and paste the ipv6 address of PC 1 so now I'm trying to ping from PC to to PC 1 and let's see if it works I'll hit enter and you can see that in fact I'm getting replies so that worked out alright for echo requests for echo replies using ipv6 so now that we've verified that we can communicate with the link local addresses on pc1 & pc2 let's bring up this router now the router will not have automatic link local addresses enabled and in fact the router has ipv6 routing disabled by default so we'll have to do some configurations on this router to get this router to play along in our ipv6 Network so I'll click on the router and I'll stretch this out so we can see it a little bit easier all right and all type in know so that we can just go straight to a router prompt I'll type in able to get to privileged user mode and then compte to get to global configuration mode now in global configuration mode the first thing that we're going to want to do is type ipv6 and then unicast - routing if we do that that enables ipv6 unicast routing on the router so without it ipv6 is basically disabled by default so now that we have our ipv6 routing enabled we need to go to our two interfaces and we have interface gigabit 0/0 you can see it here and we have interface gigabit 0/1 this router is the new 19:41 router that you can use in the new packet tracer 6 so this is nice a 1941 router it has gigabit interfaces so let's configure those with link local addresses so I'll type interface int which is short for interface G 0/0 and that puts me into interface configuration mode and I can type IP v6 and I can manually configure my link local address now with the PC it automatically self configured and we could do this here if we wanted to but in the curriculum they recommend configuring a more simplistic link local address so that it's easier to remember and work with now link local addresses are only locally significant so you'll see what this can do so we can say ipv6 address and then type in fe80 colon and instead of putting in like a MAC address or doing an auto configuration I'm just gonna say colon colon and then put in a 1 and then I can type in link I'll hit the tab key and you can see it finishes the command for me so that full command is ipv6 address fe80 colon colon 1 link - local and this creates a manual link local address on the router and in the curriculum the one is significant let's say for just the fact that maybe it's easy to remember or the fact that this might be router 1 or R 1 in the curriculum at the end I'm gonna need to type know shut for no shutdown so now the interface is up and it has a link local address of fe80 colon cold one and that's much easier to remember because it's shortened because all of the zero in the ipv6 address can be abbreviated with just the double colon right so that looks pretty good let's do the same thing for the next address so for the next interface I can say interface gigabit 0/1 and I can do the same thing and in fact I can use the same link local address on the other interface since these link local addresses are only locally significant they don't need to uniquely identify one network from another network so I can just use the same address on the other interface and that makes things even easier so now both interfaces on the router have a link local address of fe80 colon colon one and we can test it out by you can see here that it's beginning to come up the routers lights here on the interface ports are turning green and the switch port is coming up you can see it's orange it was red now it's orange it's gonna be green in a second and I'll just go to PC one open up the command prompt and I'll type ping fe80 colon colon one I'll hit enter and you can see that we get a reply so now we're able to communicate from the PC to the Gateway using ipv6 if we go to the other router we can also do it so I mean if if we go to the other PC PC zero here which we haven't even talked about yet we can also reach the gate we'll just go to PC zero here you can see that by default it has an ipv6 link local address meaning we're ready to go all we have to do is just ping the gateway fe80 colon colon 1 and you can see that we're getting replies now you might ask yourself okay so this is up and this is up can pc 0 ping pc 1 with link local addresses across the router from this network to this network well the answer to that would be no because link local addresses are only significant on the local network they're only used for communicating on a local network they're not routable so let's give that a try so I'll go to PC one again and I'll grab that address there it is right click copy and just to prove that it won't work gotta test things out command prompt ping and put it in here and you can see that we're not gonna get replies we can't ping from one network to another network using a link local address and you can see we've got requests timed out here and that's not going to change so I'm going to close the window so in the next video what we're gonna do is now that we've got our link local addresses correct right and this this router has a link local address on each interface so let's put that here it's got a link local address here and it has the same link local address on the other side now what we need to do is configure the devices with routable global unicast addresses and so we need to configure the router with a routable global unicast address and the PCs also need global unicast addresses and so I'll do that in the next tutorial

Channel: danscourses

Views: 294,186

Keywords: IPv6, CCNA, Cisco, Danscourses, Basic, Configure, Packet Tracer, link local, network addressing, 6.0

Id: FVf-GvUVm5U

Length: 10min 15sec (615 seconds)

Published: Fri Oct 25 2013