WEBVTT

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[AUDIO LOGO]

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Hello, and welcome to INE.

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Today in this
video, we will look

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at section 1, phone registration
and IM&P. Here in this section,

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we will look at task 1.5.

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Now, task 1.5 talks about NTP.

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It says configure NTP as per
the following requirements.

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We need to configure NTP
for HQ-CUCM and site B

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call manager, and
they must take time

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from switch 1 whose IP
address is 11.102.64.254.

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HQ site is in the
Pacific time zone

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and is eight hours behind GMT.

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Your site B site is in
the Central time zone

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and is two hours ahead of HQ.

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So let's go and configure this.

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So the first thing that I
would do is go to my switch

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and check if NTP is
configured on that switch.

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Because sometimes it's not
going to be preconfigured.

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So let's go and do a
show run section ntp just

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to check if NTP has
been preconfigured.

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As you can see, switch
1 is the NTP master,

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and the correct source
interface Vlan102 is being used.

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Let's go and check that.

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Show run interface vlan 102.

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It is the right IP
as per the question.

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So NTP is configured
on switch 1.

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It's preconfigured on switch 1.

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So we don't really have to
do anything on switch 1.

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The only thing that
I would need to do

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is go back to my
call manager, log

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in to OS Administration
on HQ site

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and on site B call manager.

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So login to your OS
Administration, go to Settings,

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go to NTP, and then
you would go and define

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who the NTP server is.

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So the thing with NTP is that
if I go and try and delete this,

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it would not let me delete that
because that's the only NTP

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server.

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NTP server is required.

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So you would not be
able to delete this.

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You should add one.

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So add a new one as per the
requirement of the question,

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which is 11.102.64.254.

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So add that.

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And once you add the
NTP server, then you

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can go and delete the NTP
server that you don't need.

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Let's add this.

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Let's add the same
thing on HQ also.

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So go to NTP servers.

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And this one is also
pointing to the wrong one.

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So let's go and add one
more here, so 11.102.64.254

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and save.

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Let's go back here.

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And once we save this, we
can delete the NTP server

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that we do not need so that we
only have one NTP server, which

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is the one as per the question.

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Let's go back.

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Now, we may have to go and
restart the NTP servers

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from the CLI by connecting to
my call managers, both my site

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HQ and site B. So we would
have to go and restart that.

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Let's go and first delete
the one that we don't need.

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Let's delete this one,
same thing on this side.

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So it's taking a bit of
time, but we should--

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it should come in any time.

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In the meanwhile,
on HQ site also, I

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would delete the one
that we do not need.

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So on both the sites,
I have deleted the one

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that we don't need, and we
only have one NTP server, which

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is the one that we configured.

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In the meanwhile, we
will go back to our CLIs.

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So let's go to EVE-NG
Topology and double-click

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on my publisher.

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And same thing, double-click
on my site B publisher.

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And let's log in.

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So that's going to be
administrator, C1sc0123!

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And let's log in here as well.

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Administrator, C1sc0123!

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So when you open
multiple sessions

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to the CLI of the call manager,
you may not see multiple tabs.

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You would probably see at the
bottom here, you would see--

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let me in fact
expand the screen.

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So at the bottom here, you would
see that the second screen.

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So click on that, you would see
site B. Click on that again,

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you would see HQ.

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So let's go to HQ and
to site B, in fact,

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and say utils ntp restart.

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So just restart
your NTP servers.

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And same thing you would
do for the HQ site,

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so utils ntp restart.

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So once you've done this,
your NTP should be good.

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We can now go back to
your Administration page

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and create--

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because your phones
are Jabber phones

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or any SIP phones
require NTP reference,

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you would need to go and
configure an NTP reference

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and then modify your date
time group so that you

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have the correct time zone and
the correct NTP servers being

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called for the phones.

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The phones, the SIP
phones do not really

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get time from the
call manager directly.

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So your skinny phones would
get time from the call manager,

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but your SIP phones would not.

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And for your SIP
phones, you will need

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to go to System, NTP Reference.

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First, create an NTP reference.

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I believe we don't have
any on my call manager,

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so let's do an Add New and
define that 11.102.64.254,

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which is my switch 1.

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Change this to unicast and save.

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Then go to your
Date/Time Group on HQ.

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Click on Find, click
on the default one.

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Change your time
zone to be minus 8,

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which was your HQ time zone.

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Let's choose minus
8, which is PST8PDT,

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and add your NTP reference
for your SIP phones

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to get time, and Save.

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So HQ is done.

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Let's apply this and reset.

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Same thing I would do
for site B. On site B,

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I would go back to
System NTP Reference.

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Create a new NTP
phone reference, which

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is going to be 11.102.64.254.

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This would be unicast and Save.

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Next thing I would go to
System and Date/Time Group.

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Let's do a Find.

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Modify the default
date/time group

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to have the correct
time zone, which

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is going to be negative 6.

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So that would be
central time zone, CST.

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And let's add the phone
reference, NTP phone reference

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and Save.

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Let's apply and reset.

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Now the thing is
that in the lab exam,

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we don't really have
any physical phones.

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So do I still need
the NTP reference?

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We don't really need that.

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But again, it's recommended.

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You don't really want
to be in the gray area.

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So what I would suggest is
create the NTP reference

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and add that to your
default time group.

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Make sure your time
zones are correct.

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Make sure you restart
your NTP servers.

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Once you've added
the right NTP server,

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and then you can restart or
you can apply your settings

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for your default
date/time group.

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And all your phones should
have the correct time.

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So if you look at HQ site is
in the Pacific negative 8,

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eight hours behind GMT.

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And if you look
at site B, site B

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was two hours ahead
of HQ, which basically

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means that it is in negative
6, six hours behind GMT.

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With this, we've met the
requirements of the question

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where we configured NTP.

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And we defined NTP
phone reference.

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And we changed the
date/time group

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to have the correct time zone.

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I hope this video was
informative to you,

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and thank you for watching.

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