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So the next thing we're going to want to configure here are the three Ps for

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Ike version two.

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That would be the proposal, the policy, and the profile.

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Now these again are going to be very similar between the on-prem and the AWS

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router.

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However, of course, some of the addresses are going to have to change.

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So as we did before, let's jump in and configure the on-prem router, then we'll
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take that

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configuration, we'll put it into our text editor, we'll modify that for the AWS

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router

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one, and then of course we'll just paste that in rather than typing it all over

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again.

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So let's go ahead and jump in and get the three Ps of Ike version two

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configured on

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both of our routers.

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So the first thing we want to talk about are some defaults that we have on iOS

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XE.

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Let's start off with a show crypto, Ike version two proposal.
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Let's start off with a show crypto, Ike version two proposal.

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Notice that with nothing configured whatsoever, there is a default proposal

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already here that's

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going to propose various different encryption, integrity, PRF, and Diffie-Hell

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man groups.

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So if we hit up, we'll take off proposal and we'll put on policy.

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There is also a default policy.
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There is also a default policy.

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Now it's not really defining anything as we can see.

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It's going to match any VRF.

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It's going to match any local address.

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So it's really not defining anything, but it does exist.

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And finally, if we do profile, there's not a default profile.

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Now why are we talking about this?

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So let me start by saying I personally have never run into this problem.

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However, through the years, I have read several documents about certain people
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However, through the years, I have read several documents about certain people

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in certain

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situations having problems with these default proposals and policies.

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Now if you create your own and you point the device towards your own and you

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match on things

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properly, you should not have a problem.

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However, again, on some platforms, people have had issues.

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So I just thought I would show you real quickly how to get rid of these

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defaults should you

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need to.

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Again, I've never had a need to do so, but just in case, since we're not going
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Again, I've never had a need to do so, but just in case, since we're not going

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to use

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them anyway, I'm going to show you how to get rid of that.

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All we have to do is go into configuration mode and say no, crypto, like

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version two,

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proposal default.

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Notice it's telling us it can't remove it because it's in use.

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Okay.

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So let's get rid of the policy.

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If we get rid of the policy, then we can get rid of the proposal.
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If we get rid of the policy, then we can get rid of the proposal.

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So we couldn't get rid of the proposal first because you can see right here

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that that default

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policy was actually calling to the default proposal.

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So we do have to delete these in the correct order or else it won't work.

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Now that that's done, we can ask to see all three of those things again and

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notice what

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it tells us under each one.

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When we look at the proposal, it tells us that the default is disabled.

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The policy also tells us the default is disabled now.

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And of course, there wasn't a default profile to begin with.
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And of course, there wasn't a default profile to begin with.

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So now that we've got this turned off here on router one, just for consistency,

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let's

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go ahead and disable it on AWS router one as well.

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So since this is the same configuration, we'll just go ahead and paste it in.

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We put it in the correct order.

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So it took both of them out.

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Just to verify we're in the same place, we'll look at all three commands again.

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Once again, we see both defaults are disabled and there is no default profile.

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So now we've got both of our routers on a level playing field and we have
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So now we've got both of our routers on a level playing field and we have

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disabled the

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default proposal and policy.

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So now let's go ahead and begin configuring our own.

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Let's jump back over to on-prem R1.

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So the first thing we're going to want is under crypto, Ike version two, we'll

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do a proposal.

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At this point, it's just going to want to name.

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So we'll call it Ike V2 proposal for AWS.

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So we see here as soon as we come in, it tells us that we essentially have two
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So we see here as soon as we come in, it tells us that we essentially have two

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choices.

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The first choice is to use an encryption algorithm other than AES GCM.

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And if we choose to do that, we're going to have to specify an integrity

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algorithm and

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a Diffie-Hellman group.

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Or alternatively, we can set the encryption algorithm to AES GCM and instead

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specify a

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pseudo random function or a PRF algorithm and a Diffie-Hellman group.
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pseudo random function or a PRF algorithm and a Diffie-Hellman group.

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Now in this particular case, GCM is generally preferred.

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So let's go ahead and do that.

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We'll say encryption GCM and then notice we basically have two choices for the

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bit length.

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It's either 128 or 256.

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Let's go ahead and do 256.

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Now it's already told us that if we do this, we have to specify the PRF for the

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PRF.

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We'll just do SHA 512.
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We'll just do SHA 512.

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Finally, we need a Diffie-Hellman group.

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We can really use any of these options.

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I'm just going to go ahead and use Diffie-Hellman group 20.

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We may modify this later, but this is what we'll choose for now.

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So that takes care of the proposal.

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We'll exit out of configuration mode here and verify that it took our proposal.

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So if we do our show crypto Ike version 2 proposal again, we see that now the

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only one we have

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is the one we just created.
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is the one we just created.

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It has our encryption, our PRF, and our Diffie-Hellman group specified.

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By the way, another command that's generally recommended, and we'll just turn

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this on on

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both devices, is the crypto Ike version 2, fragmentation MTU, and set it to

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something like

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1200.

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So that should take care of configuring the proposal.

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And this is going to be identical on AWS R1.

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There's nothing device specific about this configuration.
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There's nothing device specific about this configuration.

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So let's just hop over there and put this configuration in.

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So again, we'll just paste this in and let's move on to the policies.

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Again, we'll always start on the on-prem router.

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So for the policy, crypto Ike version 2, policy, once again, we just have to

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give it a name.

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So we'll call it Ike V2, underscore policy, underscore AWS.

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Now, the first thing this tells us is that the policy must have at least one
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Now, the first thing this tells us is that the policy must have at least one

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complete

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proposal attached.

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Okay, so let's go ahead and do that first then.

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So we'll put in proposal and then the name of our proposal, which is Ike V2,

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underscore

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proposal, underscore AWS.

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If for any reason that proposal was not complete, it would kick this command

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out telling us

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that it cannot attach that particular proposal because it's not complete.
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that it cannot attach that particular proposal because it's not complete.

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In our case, we're okay.

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The other thing we probably want to do here is do a match for an address.

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We'll match a local address.

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And it's simply once an IP before address to match on this being the on-prem

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router.

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This would be the address we're going to be sourcing the tunnel from, which is

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going to

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be the 204 dot 186 dot 19 dot 10.

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So once again, we'll exit out here and we'll repeat our command to look at the
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So once again, we'll exit out here and we'll repeat our command to look at the

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policy.

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And this is exactly what it should look like.

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We see our policy with its name.

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It's using the global VRF.

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It's matching the local address of our gigabit interface.

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If we do a show IP interface brief, notice that is the address on gigabit one.

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And then of course, our proposal is also attached to that policy.

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So now what we'll do is we'll put this in notepad.

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If we look at this in notepad, I've already put the policy in and configured

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the local
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the local

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address to be AWS router one's interface, which is 10 dot 20 dot 1 dot 254.

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So that being the case, we can just highlight all of this.

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We can copy it.

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Go back over to our terminal software on AWS R one and paste this configuration

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in.

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Next up, of course, is the profile.

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Let's go back over to router one back in a configuration mode crypto.

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Ike version to profile.
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Ike version to profile.

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Once again, it simply wants a name.

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Ike version to profile AWS.

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Keep in mind, this is just what I'm choosing to name these things.

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You can of course name these, whatever makes sense in your environment with

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your own naming

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convention.

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But regardless of what we name it, let's go ahead and hit enter.

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And it tells us that we have to have a local and a remote authentication method

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.

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And we have to have a match identity or a match certificate or match any
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And we have to have a match identity or a match certificate or match any

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statement.

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But we're going to actually do a match identity.

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But let's go ahead and put in all of the information we need here as we go.

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So the first thing we're going to do is a match address local.

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Now here we could put in an address or we can actually specify an interface.

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We'll do an interface.

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And in our case, it's going to be the gigabit one interface.
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And in our case, it's going to be the gigabit one interface.

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The next thing we want to do is match the identity.

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So we'll say match identity.

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This is going to be for the remote address.

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Now this is where things get interesting.

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Since we're double nadding, this is actually going to be the private address of

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the other

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side.

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That's how the other side is going to identify itself to us to be able to match

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up to this

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profile.

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So since this is the on-prem router, this is going to be the address of the

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other side,
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other side,

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which is the 10 dot 20 dot 1 dot 254.

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Now you can put a mask after this.

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If you want, it will default to a 32 bit mask, meaning the whole thing has to

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match.

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So we'll just go ahead and hit enter.

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The default will be fine.

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We also want to do an identity of a local address.

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This will be again our local interfaces address.

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So this in this case would be the 204 dot 186 dot 19 dot 10.

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Next we have to configure the authentication method.
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Next we have to configure the authentication method.

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So we'll say authentication, remote, and we're of course going to be doing a

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pre-share

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key.

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So we just say pre-share.

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Now we mentioned when we created the key ring that the key ring was optional.

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If we wanted, we could put the key right here by putting the keyword key and

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simply pasting

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the key in.

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Or we can leave it off since we're using a key ring.
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Or we can leave it off since we're using a key ring.

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In which case we'll just hit enter.

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We'll hit up, we'll change our remote to local.

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That way both methods are pre-share.

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Then of course, if we're going to use a key ring, we have to tell it that.

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So we say key ring.

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It's a local key ring.

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And we named it AWS underscore keys.

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It will of course use the identity information to know which key out of that

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key ring to use.

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It's also recommended to enable DPDs, which if we look at the help, these are
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It's also recommended to enable DPDs, which if we look at the help, these are

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basically

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like live lists checks for the peers.

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It's basically a keep alive.

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So we'll turn on DPD.

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We'll set it for 10 and two and we'll do it as on demand.

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So once again, let's go ahead and exit.

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Let's look at our profile and we can see that everything we just configured is

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here.

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So we see things like the name, the local interface, the identities, both
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So we see things like the name, the local interface, the identities, both

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remote and

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local, as well as the authentication methods and the key ring.

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We also see here a little further down where DPD is now enabled with an

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interval of 10

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seconds and a retry of two.

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So this is looking pretty good.

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Once again, there'll be some minor changes for AWS R1.

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Let's take a look.

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So this is the proposed configuration for AWS R1.

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We can see here it's the same interface we're matching on.
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We can see here it's the same interface we're matching on.

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The remote address, of course, is going to be the on-prem routers address this

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time.

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The local address is, of course, this router's address and the rest of it is

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exactly the

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same.

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So let's go ahead and put this configuration on AWS R1.

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Again, we'll simply paste it in.

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We'll exit configuration.

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We've already verified on-prem router one, but let's verify here on AWS R1 as
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We've already verified on-prem router one, but let's verify here on AWS R1 as

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well.

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So first we'll look at our proposal.

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Everything here looks correct.

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Next we'll look at our policy.

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Everything here looks correct as well.

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And finally, let's take a look at our profile.

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And this all looks correct also.

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So that takes care of the configuration of the three P's for iq version two.

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So now that we have all of the components configured for iq version two, we

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essentially

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need to do the same thing for ipsack.
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need to do the same thing for ipsack.

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Those are quite easier to configure, but let's take a look at it in the next

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video.
