1
00:00:00,000 --> 00:00:03,944
[AUDIO LOGO]

2
00:00:03,944 --> 00:00:08,100

3
00:00:08,100 --> 00:00:10,420
So of course, one
of the requirements

4
00:00:10,420 --> 00:00:13,450
for PIM sparse
mode is we do have

5
00:00:13,450 --> 00:00:15,280
to have a rendezvous point.

6
00:00:15,280 --> 00:00:18,830
Now, how we discover
that rendezvous point--

7
00:00:18,830 --> 00:00:21,160
well, there are several
different methods.

8
00:00:21,160 --> 00:00:26,560
Those different methods we will
be exploring in a future skill.

9
00:00:26,560 --> 00:00:31,180
For right now, in this skill,
just to get PIM sparse mode up

10
00:00:31,180 --> 00:00:35,500
and running, we're simply
going to do a static RP, which

11
00:00:35,500 --> 00:00:37,090
means we're simply
going to program

12
00:00:37,090 --> 00:00:40,640
each router with the address
of the rendezvous point.

13
00:00:40,640 --> 00:00:43,970
So this is going to be a
fairly simple configuration.

14
00:00:43,970 --> 00:00:47,800
So let's jump into our
topology, take a look at where

15
00:00:47,800 --> 00:00:49,300
we're going to put the RP.

16
00:00:49,300 --> 00:00:51,340
And then we'll jump
into the command line

17
00:00:51,340 --> 00:00:57,120
and configure our devices so
that they know where the RP is.

18
00:00:57,120 --> 00:01:01,100
So once again, we are
on Multicast Topology 1.

19
00:01:01,100 --> 00:01:05,120
And this time, we're going to be
focusing on configuring the RP.

20
00:01:05,120 --> 00:01:09,330
For the RP, we're going to be
configuring router 4 down here.

21
00:01:09,330 --> 00:01:11,660
And more specifically,
we're going

22
00:01:11,660 --> 00:01:15,500
to be configuring a loopback
interface on router 4.

23
00:01:15,500 --> 00:01:18,650
In fact, we're just going to
use the one that's already there

24
00:01:18,650 --> 00:01:23,030
with the address 10.4.4.4.

25
00:01:23,030 --> 00:01:26,150
So that's going to be the RP
that we're going to configure

26
00:01:26,150 --> 00:01:27,990
on all of the devices.

27
00:01:27,990 --> 00:01:31,820
Now, in this case, we're going
to want to start on router 4

28
00:01:31,820 --> 00:01:35,630
because we also need multicast
enabled on that loopback

29
00:01:35,630 --> 00:01:36,530
interface.

30
00:01:36,530 --> 00:01:41,390
And we actually didn't enable
multicast on our loopbacks.

31
00:01:41,390 --> 00:01:44,600
So let's go ahead and jump in
and start our configuration

32
00:01:44,600 --> 00:01:45,650
on router 4.

33
00:01:45,650 --> 00:01:48,590
And then of course, we'll
configure all the other routers

34
00:01:48,590 --> 00:01:53,370
to point to router 4 as the RP.

35
00:01:53,370 --> 00:01:56,070
So the first thing we want
to do here on router 4

36
00:01:56,070 --> 00:01:59,730
is enable multicast on
the loopback interface

37
00:01:59,730 --> 00:02:02,130
that we're going to
be using for the RP.

38
00:02:02,130 --> 00:02:05,230
So we want to go into
multicast-routing again.

39
00:02:05,230 --> 00:02:08,729
And if we want, we can actually
go directly into the address

40
00:02:08,729 --> 00:02:10,479
family right from here.

41
00:02:10,479 --> 00:02:13,890
So we can say
multicast-routing ipv4.

42
00:02:13,890 --> 00:02:17,280
Notice this drops me right
into the address family.

43
00:02:17,280 --> 00:02:21,000
And then we can say for
our loopback 0 interface

44
00:02:21,000 --> 00:02:25,390
to enable multicast
routing on that interface.

45
00:02:25,390 --> 00:02:29,850
The next thing we want to
do is go into router pim.

46
00:02:29,850 --> 00:02:33,060
Under router pim, we again want
to go into the address-family

47
00:02:33,060 --> 00:02:34,590
for ipv4.

48
00:02:34,590 --> 00:02:37,950
And we want to
configure a static RP.

49
00:02:37,950 --> 00:02:41,640
The way we do this is simply
by saying our rp-address

50
00:02:41,640 --> 00:02:44,010
and then entering
the IP address.

51
00:02:44,010 --> 00:02:46,990
In this case, it's
router 4's loopback.

52
00:02:46,990 --> 00:02:49,740
So is 10.4.4.4.

53
00:02:49,740 --> 00:02:51,840
We'll commit those changes.

54
00:02:51,840 --> 00:02:54,540
And we'll exit out of
configuration mode.

55
00:02:54,540 --> 00:02:57,340
Now, if it took this
configuration correctly,

56
00:02:57,340 --> 00:03:01,020
we should be able to
say show pim rp map.

57
00:03:01,020 --> 00:03:05,310
And it will show us here
that for the PIM Group-to-RP

58
00:03:05,310 --> 00:03:09,060
mappings for the entire
multicast group range,

59
00:03:09,060 --> 00:03:18,370
the 224.0.0.0/4, the
RP is in fact 10.4.4.4.

60
00:03:18,370 --> 00:03:21,220
Keep in mind, as we look
through these show commands,

61
00:03:21,220 --> 00:03:23,860
whenever they're displaying
that question mark,

62
00:03:23,860 --> 00:03:26,890
it's because it's trying
to do a reverse DNS

63
00:03:26,890 --> 00:03:31,240
and show us the friendly
name for that device.

64
00:03:31,240 --> 00:03:33,460
In this particular
environment, I

65
00:03:33,460 --> 00:03:35,920
don't have DNS set
up or configured.

66
00:03:35,920 --> 00:03:39,170
And I don't have IP host names
configured on the routers.

67
00:03:39,170 --> 00:03:42,440
So it can't resolve
the DNS names.

68
00:03:42,440 --> 00:03:45,110
So we're just going to see that
it has question marks in here.

69
00:03:45,110 --> 00:03:48,140
But just be aware that
that's why they're in there.

70
00:03:48,140 --> 00:03:50,560
We also see for the
info source, it's

71
00:03:50,560 --> 00:03:53,080
not listing anybody,
because it's been

72
00:03:53,080 --> 00:03:56,030
elected via the configuration--

73
00:03:56,030 --> 00:03:58,570
in other words,
statically configured.

74
00:03:58,570 --> 00:04:01,510
Also, that means it's
never going to expire,

75
00:04:01,510 --> 00:04:04,700
because, well, it's
statically configured.

76
00:04:04,700 --> 00:04:07,630
Now, the other
IOS XR routers are

77
00:04:07,630 --> 00:04:09,580
going to need
these same commands

78
00:04:09,580 --> 00:04:13,270
with the exception of
enabling multicast routing

79
00:04:13,270 --> 00:04:15,290
on their loopback interfaces.

80
00:04:15,290 --> 00:04:19,410
But that being the case, we can
configure all of them together.

81
00:04:19,410 --> 00:04:21,649
So let's just go head
over here to router 1.

82
00:04:21,649 --> 00:04:25,810
We'll paste the
configuration in.

83
00:04:25,810 --> 00:04:31,805
We'll do the same on
router 2 and on router 3.

84
00:04:31,805 --> 00:04:35,240

85
00:04:35,240 --> 00:04:38,390
Now, of course, it's a little
bit different on IOS XE.

86
00:04:38,390 --> 00:04:39,380
Not a lot.

87
00:04:39,380 --> 00:04:42,540
But let's jump over to router 5
and take a look at the command.

88
00:04:42,540 --> 00:04:47,960
So on router 5, it's going to
be ip pim rp-address and then

89
00:04:47,960 --> 00:04:50,630
the address 10.4.4.4.

90
00:04:50,630 --> 00:04:52,590
So it's just a single command.

91
00:04:52,590 --> 00:04:54,650
And we can exit configuration.

92
00:04:54,650 --> 00:04:56,750
Notice right away,
we get this line

93
00:04:56,750 --> 00:05:01,070
protocol on interface
Tunnel0, state changed to up.

94
00:05:01,070 --> 00:05:05,780
That is the PIM control
tunnel coming up for the RP.

95
00:05:05,780 --> 00:05:08,450
Now, that doesn't mean it's
a complete actual tunnel.

96
00:05:08,450 --> 00:05:11,810
But this is the tunnel we
will use for PIM register

97
00:05:11,810 --> 00:05:14,870
messages going towards the RP.

98
00:05:14,870 --> 00:05:17,330
Let's go ahead and
configure router 6 and 7.

99
00:05:17,330 --> 00:05:22,010
We can again just paste
that configuration in.

100
00:05:22,010 --> 00:05:23,223
So there's router 6.

101
00:05:23,223 --> 00:05:24,640
We should see that
tunnel come up.

102
00:05:24,640 --> 00:05:25,570
There it is.

103
00:05:25,570 --> 00:05:26,920
And router 7.

104
00:05:26,920 --> 00:05:31,150

105
00:05:31,150 --> 00:05:32,740
And there's our tunnel.

106
00:05:32,740 --> 00:05:35,530
We won't actually see
these on the RP side,

107
00:05:35,530 --> 00:05:39,010
because IOS XR doesn't
display it the same way.

108
00:05:39,010 --> 00:05:42,100
While we're wrapping up this
section, since this is really

109
00:05:42,100 --> 00:05:44,680
all there is to
configuring the RP address,

110
00:05:44,680 --> 00:05:47,080
let's take a look at
some good verification

111
00:05:47,080 --> 00:05:51,580
commands on both
IOS XR and IOS XE

112
00:05:51,580 --> 00:05:54,650
that we'll be using throughout
the rest of this skill.

113
00:05:54,650 --> 00:05:56,980
Now, they may not
all show us something

114
00:05:56,980 --> 00:05:59,510
right now since we don't
have a ton going on.

115
00:05:59,510 --> 00:06:02,410
But let's at least get
introduced to the commands.

116
00:06:02,410 --> 00:06:04,450
Let's jump over to IOS XR.

117
00:06:04,450 --> 00:06:06,790
We'll just take a
look at router 1.

118
00:06:06,790 --> 00:06:09,370
Now, a couple of these we
have already looked at.

119
00:06:09,370 --> 00:06:12,370
But we have the show
ip pim interface.

120
00:06:12,370 --> 00:06:14,020
This, of course,
is a great command

121
00:06:14,020 --> 00:06:15,700
to see which
interfaces are running

122
00:06:15,700 --> 00:06:19,840
PIM, your neighbors, hello
intervals, what the DR is

123
00:06:19,840 --> 00:06:21,820
on that segment, and so on.

124
00:06:21,820 --> 00:06:26,160

125
00:06:26,160 --> 00:06:29,010
Show pim neighbor, of
course, will show you

126
00:06:29,010 --> 00:06:32,080
your neighborships on
each of your interfaces.

127
00:06:32,080 --> 00:06:35,370
So again, these two commands
we've looked at previously.

128
00:06:35,370 --> 00:06:37,860
There's another good command--

129
00:06:37,860 --> 00:06:41,160
mrinfo for multicast
routing information.

130
00:06:41,160 --> 00:06:43,830
And we could ask for,
say, one of our neighbors.

131
00:06:43,830 --> 00:06:46,140
We'll say for 10.2.2.2.

132
00:06:46,140 --> 00:06:48,540
And this will give
us information

133
00:06:48,540 --> 00:06:51,030
about that multicast router.

134
00:06:51,030 --> 00:06:53,490
So it'll even tell us things
like what version of code

135
00:06:53,490 --> 00:06:57,460
that it's running, its
interfaces, and so on.

136
00:06:57,460 --> 00:07:01,300
There's also a command
show pim topology.

137
00:07:01,300 --> 00:07:05,290
This is sort of
like show ip mroute,

138
00:07:05,290 --> 00:07:08,530
if you're familiar
with that on IOS XE.

139
00:07:08,530 --> 00:07:10,670
We'll be looking at
that command as well.

140
00:07:10,670 --> 00:07:13,540
But this is probably
the closest equivalent

141
00:07:13,540 --> 00:07:17,510
of that command on IOS XR.

142
00:07:17,510 --> 00:07:21,110
However, there is also
a command show mfib

143
00:07:21,110 --> 00:07:25,740
route, which also will show you
the multicast routing table.

144
00:07:25,740 --> 00:07:28,310
So we'll be using
both of these as we

145
00:07:28,310 --> 00:07:30,860
go through the rest of this
skill and future skills

146
00:07:30,860 --> 00:07:32,240
on multicast.

147
00:07:32,240 --> 00:07:35,880
But again, good information
to keep an eye on.

148
00:07:35,880 --> 00:07:39,260
We can also check
things like RPF checks.

149
00:07:39,260 --> 00:07:42,620
So if we wanted to see
our current RPF check,

150
00:07:42,620 --> 00:07:45,780
say, towards the
rendezvous point's address,

151
00:07:45,780 --> 00:07:47,060
we could do this.

152
00:07:47,060 --> 00:07:50,330
And we could see that currently
from router 1's perspective,

153
00:07:50,330 --> 00:07:54,080
to get to router 4's loopback,
it would go out Gigabit

154
00:07:54,080 --> 00:07:55,700
0/0/0/1.

155
00:07:55,700 --> 00:08:03,410
And the RPF neighbor is
actually router 5, 172.16.135.5.

156
00:08:03,410 --> 00:08:07,160
A lot of these commands are
very similar over on IOS XE.

157
00:08:07,160 --> 00:08:09,290
Let's take a look at router 5.

158
00:08:09,290 --> 00:08:12,560
Most of these are going to
be the same, except we add IP

159
00:08:12,560 --> 00:08:15,020
into them on IOS XE.

160
00:08:15,020 --> 00:08:20,550
So for example, show
ip pim interface.

161
00:08:20,550 --> 00:08:22,410
Again, we've seen this before.

162
00:08:22,410 --> 00:08:25,290
Show ip pim neighbor.

163
00:08:25,290 --> 00:08:27,790
Again, we've looked at this
one previously as well.

164
00:08:27,790 --> 00:08:30,330
But notice they're the
same commands, almost

165
00:08:30,330 --> 00:08:31,260
the same output.

166
00:08:31,260 --> 00:08:33,669
Formatting is slightly
different, and so on.

167
00:08:33,669 --> 00:08:37,010
However, we add the
word ip to them.

168
00:08:37,010 --> 00:08:41,870
Show ip pim rp will show
us the currently used RP

169
00:08:41,870 --> 00:08:44,039
for any active group.

170
00:08:44,039 --> 00:08:47,640
And if we do the same
command but we add map to it,

171
00:08:47,640 --> 00:08:53,490
it'll show us which RP will
be used for which group range.

172
00:08:53,490 --> 00:08:58,250
Now, here we can see that same
mapping that we had on IOS XR,

173
00:08:58,250 --> 00:09:01,700
where it's saying the
entire multicast group range

174
00:09:01,700 --> 00:09:05,930
is currently configured
statically to go to the RP

175
00:09:05,930 --> 00:09:11,030
10.4.4.4, which also indicates
that our configuration worked

176
00:09:11,030 --> 00:09:12,140
properly.

177
00:09:12,140 --> 00:09:15,020
There's also show ip rpf.

178
00:09:15,020 --> 00:09:18,750
So again, for example, we could
look at router 4's loopback.

179
00:09:18,750 --> 00:09:23,030
So we know the RPF interface
to get to the rendezvous point.

180
00:09:23,030 --> 00:09:24,890
And we see what it's
telling us here,

181
00:09:24,890 --> 00:09:26,810
is that it's going
to go out interface

182
00:09:26,810 --> 00:09:31,310
Gigabit 2 towards the
RPF neighbor of router 4.

183
00:09:31,310 --> 00:09:36,480
It's going to be following
the route 10.4.4.4/32.

184
00:09:36,480 --> 00:09:42,010
And it learned that
information from OSPF 1.

185
00:09:42,010 --> 00:09:43,880
And of course,
last but not least,

186
00:09:43,880 --> 00:09:49,300
one of our most useful commands
on IOS XE, show ip mroute.

187
00:09:49,300 --> 00:09:53,090
This will show us the
multicast routing table.

188
00:09:53,090 --> 00:09:56,080
Now, of course, you may have
noticed, in all of the outputs,

189
00:09:56,080 --> 00:10:00,880
the only group currently
active is 224.0.1.40.

190
00:10:00,880 --> 00:10:04,150
That's actually a
group used by auto-RP.

191
00:10:04,150 --> 00:10:08,090
We will discuss this again in
more detail in a future skill.

192
00:10:08,090 --> 00:10:10,630
But for right now, just
notice that that actually

193
00:10:10,630 --> 00:10:14,930
is a default group that the
Cisco routers are listening to.

194
00:10:14,930 --> 00:10:17,170
So again, these show
commands didn't necessarily

195
00:10:17,170 --> 00:10:19,160
show us a whole lot right now.

196
00:10:19,160 --> 00:10:21,250
But I did want to
introduce each one of them,

197
00:10:21,250 --> 00:10:24,790
as we're going to be using
them a lot in future videos

198
00:10:24,790 --> 00:10:27,270
and skills.

199
00:10:27,270 --> 00:10:30,500
So in this video, we
took a look at how

200
00:10:30,500 --> 00:10:36,680
to configure static RP on
both IOS XR and IOS XE.

201
00:10:36,680 --> 00:10:39,900
And as we saw, it's a
fairly simple process.

202
00:10:39,900 --> 00:10:42,170
We simply statically
configure the address

203
00:10:42,170 --> 00:10:43,620
of the rendezvous point.

204
00:10:43,620 --> 00:10:46,100
And everybody simply uses that.

205
00:10:46,100 --> 00:10:49,790
We also took a look at some
very useful show commands, which

206
00:10:49,790 --> 00:10:51,890
may not be so useful just yet.

207
00:10:51,890 --> 00:10:54,810
But we'll be using
them as we go along.

208
00:10:54,810 --> 00:10:59,630
Now, there's also a protocol,
IGMP, or Internet Group

209
00:10:59,630 --> 00:11:02,690
Management Protocol,
running on the edge

210
00:11:02,690 --> 00:11:05,370
to the client or receiver.

211
00:11:05,370 --> 00:11:09,030
So we need to talk about that
in a little more detail as well.

212
00:11:09,030 --> 00:11:11,780
And that's exactly what
we're going to do next.

213
00:11:11,780 --> 00:11:15,200
Until then, I hope this has
been informative for you,

214
00:11:15,200 --> 00:11:18,370
and I'd like to thank
you for viewing.

215
00:11:18,370 --> 00:11:22,000