Pinging IPv6 Addresses

We’re going to send some v6 pings from R2 to R3 over their shared subnet, then from R3 to R4 over their shared subnet, and we’ll see first off what’s going on there before we try any end to end pinging.

There are really three different ways to send pings with IPv6. The first one is just to use the ping command and don’t even bother putting IPv6 and just follow it with a legal IPv6 address, and you should be fine.

And no problem at all and a lot of this looks awfully familiar.

Let’s look at another way to send that though and that’s by using IPV 6 here

and there you go. The packet’s came back very quickly our ping is successful and all is well.

you can also send an extended ping and you don’t have to do this to use v6 because you can use either one of these two options. But if you want to change the number of packets you’re sending or something like that, just enter ‘ping’ and it asks you for the protocol. Make sure to put in IPV 6 and then you are going to have to enter your target and let’s say we wanted to send 10 pings and just accept all the others

It went right through it. So all three ways are good.

Now let me show you something:

When you see ‘no valid source address for destination’, one thing you might want to do is just check your address because what I did I left part of the subnet ID out (I left the one out) and it tried to look it up, but there was no way and we don’t have a static route or any kind of default routing here.

So anytime you see ‘no valid source address or destination’, make sure that you have entered the IPv6 address correctly, especially at first because you’re getting used to it.

So let’s go to R3 and we’ll just ping from there.

No problem at all, that’s R4’s address on its Fast Ethernet interface.

Just for fun and to show you that there actually is a R4 in this lab:

Everything is beautiful.

So we’re able to send our pings from R2 to R3 and from R3 to R4.

But what do you think about in the end pinging right now?

By looking at it (the first picture of this chapter) and from past experience in this course, we know that you’re going to need some kind of static routing or dynamic routing protocol and IP version 4 to make that happen. Because you’re going from one subnet to the other. But what about Version 6?

Let’s send a version 6 ping here

good old fashioned ping timeout!! and you notice when I mis entered that address earlier only one packet even went out because it just means that we can’t do it.

Well we sent all five ICMP echoes out here and the time out was two seconds and the success rate is zero out of five! which is a really poor success rate.

So just to make sure something isn’t askew, let’s go over R2 and ping IPV6

and that’s the message we get. So when you see something like this, double check what you’ve entered here as far as the subnet goes, and that is correct.

So the problem is that R2 doesn’t have any idea where the 2001:3333:4444:1 subnet is, and R4 doesn’t have any idea where the 2001:2222:3333:1 subnet is,

And just to make sure:

We get nothing.

We got a connected route that allow us to ping R3 and we have the local routes we know about those now. But we don’t have anything that’s going to help us ping R4, so that just failed immediately.