1
00:00:00,000 --> 00:00:03,792
[AUDIO LOGO]

2
00:00:03,792 --> 00:00:08,070

3
00:00:08,070 --> 00:00:11,160
Now that we have our
customer VRFs configured,

4
00:00:11,160 --> 00:00:14,820
it's time to set up and
configure multi-protocol BGP

5
00:00:14,820 --> 00:00:19,230
in our core network between
our route reflector and our PE

6
00:00:19,230 --> 00:00:20,340
routers.

7
00:00:20,340 --> 00:00:23,250
Much like we did
with the VRFs, we'll

8
00:00:23,250 --> 00:00:25,170
go ahead and configure
this to support

9
00:00:25,170 --> 00:00:29,190
IPv4 and IPv6 at the same time.

10
00:00:29,190 --> 00:00:32,670
And we'll go ahead and use
some peer templates and such

11
00:00:32,670 --> 00:00:36,160
to make this a little bit
easier to configure as we go.

12
00:00:36,160 --> 00:00:40,620
So as per usual, let's take a
look at our topology diagram,

13
00:00:40,620 --> 00:00:42,990
draw out what we're going
to be building, and then

14
00:00:42,990 --> 00:00:46,800
jump into the command line
and get multi-protocol BGP up

15
00:00:46,800 --> 00:00:49,288
and running.

16
00:00:49,288 --> 00:00:50,830
So what we're going
to be configuring

17
00:00:50,830 --> 00:00:53,540
in this part of
our demonstration,

18
00:00:53,540 --> 00:00:56,080
we're going to be configuring
multi-protocol BGP

19
00:00:56,080 --> 00:01:01,480
neighborships between
router 1, router 2, router

20
00:01:01,480 --> 00:01:04,730
5, and the route reflector.

21
00:01:04,730 --> 00:01:08,080
So our logical
IBGP neighborships

22
00:01:08,080 --> 00:01:11,300
will look like our
orange lines here.

23
00:01:11,300 --> 00:01:14,350
So let's go ahead and jump
into the command line.

24
00:01:14,350 --> 00:01:17,380
This time, we'll start
on router reflector 1.

25
00:01:17,380 --> 00:01:20,320

26
00:01:20,320 --> 00:01:23,870
So let's begin by
configuring BGP.

27
00:01:23,870 --> 00:01:25,580
We have to create
the actual instance,

28
00:01:25,580 --> 00:01:28,120
so we'll do router bgp 100.

29
00:01:28,120 --> 00:01:30,850
We'll set our bgp router-id.

30
00:01:30,850 --> 00:01:32,530
The route reflector
is essentially

31
00:01:32,530 --> 00:01:35,120
acting as router 12
in our environment,

32
00:01:35,120 --> 00:01:39,790
so we'll set the router ID
to 10.12.12.12, which is also

33
00:01:39,790 --> 00:01:41,650
its loopback interface
that we're going

34
00:01:41,650 --> 00:01:44,190
to be using for our peering.

35
00:01:44,190 --> 00:01:47,790
Now something else we can do to
optimize our environment here,

36
00:01:47,790 --> 00:01:52,620
we can actually disable
the default IPv4 address

37
00:01:52,620 --> 00:01:55,440
family on iOS XE.

38
00:01:55,440 --> 00:02:01,650
We don't need to form a BGP
neighborship for IPv4, just

39
00:02:01,650 --> 00:02:05,820
for VPNv4 and VPNv6.

40
00:02:05,820 --> 00:02:08,800
Now this step isn't
entirely necessary,

41
00:02:08,800 --> 00:02:10,650
but if we're not
going to be doing

42
00:02:10,650 --> 00:02:14,790
regular IPv4 routes in
our core, then there's

43
00:02:14,790 --> 00:02:17,760
really no need for that
extra neighborship.

44
00:02:17,760 --> 00:02:21,240
So let's go ahead and
just turn that off.

45
00:02:21,240 --> 00:02:25,260
It's simply no bgp default ipv4.

46
00:02:25,260 --> 00:02:30,110
Now the next thing we want to do
is create some peer templates.

47
00:02:30,110 --> 00:02:32,270
So the first thing
we'll do is we'll create

48
00:02:32,270 --> 00:02:35,600
a template for our peer-policy.

49
00:02:35,600 --> 00:02:39,710
And we'll just call this
PP_PE for Peer-Policy

50
00:02:39,710 --> 00:02:42,800
towards our Provider
Edge routers.

51
00:02:42,800 --> 00:02:46,940
What things do we need
to say towards the PEs?

52
00:02:46,940 --> 00:02:49,100
Well, one thing
we're going to need

53
00:02:49,100 --> 00:02:51,470
is to say that they're
route-reflector-clients,

54
00:02:51,470 --> 00:02:54,260
since this is the
route reflector.

55
00:02:54,260 --> 00:02:57,110
The other thing we have
to do is configure this

56
00:02:57,110 --> 00:02:59,150
to send communities.

57
00:02:59,150 --> 00:03:02,030
We'll go ahead and configure
it to send both communities,

58
00:03:02,030 --> 00:03:05,450
extended and standard, even
though we only really need

59
00:03:05,450 --> 00:03:09,960
extended to support
our layer 3 VPNs.

60
00:03:09,960 --> 00:03:11,400
The next thing
we're going to need

61
00:03:11,400 --> 00:03:14,040
is a peer-session template.

62
00:03:14,040 --> 00:03:17,610
We'll call this PS_PE
for Peer-Session

63
00:03:17,610 --> 00:03:19,680
to the Provider Edges.

64
00:03:19,680 --> 00:03:22,110
Things we want to
configure in here

65
00:03:22,110 --> 00:03:25,110
is that they are
in remote-as 100.

66
00:03:25,110 --> 00:03:28,740
And we'll set the
update-source to lo0.

67
00:03:28,740 --> 00:03:31,740
So this should take care
of our peer templates,

68
00:03:31,740 --> 00:03:35,213
both for the policy
and for the session.

69
00:03:35,213 --> 00:03:36,630
Now all we have
to do is configure

70
00:03:36,630 --> 00:03:39,760
our neighbors to actually
use these templates.

71
00:03:39,760 --> 00:03:43,650
So we'll start with nei
10.1.1.1, which is router 1.

72
00:03:43,650 --> 00:03:49,230
And we will tell it to
inherit peer-session PS_PE.

73
00:03:49,230 --> 00:03:54,870
We have to repeat the same
thing for router 2 and router 5.

74
00:03:54,870 --> 00:03:58,560
Next, we'll go into our
address-family, specifically

75
00:03:58,560 --> 00:04:00,660
for vpnv4.

76
00:04:00,660 --> 00:04:05,040
First thing we have to do
is activate our neighbors

77
00:04:05,040 --> 00:04:07,980
and tell it to inherit
our peer-policy.

78
00:04:07,980 --> 00:04:11,500
We'll do both of these commands
for all of the other routers,

79
00:04:11,500 --> 00:04:15,150
so router 2 and router 5.

80
00:04:15,150 --> 00:04:18,730
Now we want to configure
this for IPv6 as well.

81
00:04:18,730 --> 00:04:22,740
But a real easy way to do
that is if we say do sho run.

82
00:04:22,740 --> 00:04:24,978
And look for the
section for BGP.

83
00:04:24,978 --> 00:04:26,520
What we're going to
do is we're going

84
00:04:26,520 --> 00:04:29,010
to say address-family vpnv6.

85
00:04:29,010 --> 00:04:31,560

86
00:04:31,560 --> 00:04:33,000
And we're going
to copy and paste

87
00:04:33,000 --> 00:04:35,880
this configuration because
it's going to be the same.

88
00:04:35,880 --> 00:04:37,410
But before we do
that, I also want

89
00:04:37,410 --> 00:04:42,690
to point out that notice that
iOS XE went ahead and added

90
00:04:42,690 --> 00:04:47,280
that send-community extended on
each of our neighbor statements

91
00:04:47,280 --> 00:04:49,860
for 1, 2, and 5.

92
00:04:49,860 --> 00:04:54,120
So I still like to put
it in the peer-template

93
00:04:54,120 --> 00:04:55,660
just so it's there.

94
00:04:55,660 --> 00:04:58,050
But notice that
iOS does take care

95
00:04:58,050 --> 00:05:02,460
of the send-community for us.

96
00:05:02,460 --> 00:05:05,870
Now what we want to do is
copy and paste all of this

97
00:05:05,870 --> 00:05:08,520
into the VPNv6 section.

98
00:05:08,520 --> 00:05:11,480
So we'll simply highlight
all of that configuration

99
00:05:11,480 --> 00:05:13,740
and simply paste it in.

100
00:05:13,740 --> 00:05:16,430
We'll do our sho
run s bgp again.

101
00:05:16,430 --> 00:05:19,070
And we'll just make sure
that all of that information

102
00:05:19,070 --> 00:05:22,250
went under VPNv6
as well as VPNv4

103
00:05:22,250 --> 00:05:24,488
so we can see that it's correct.

104
00:05:24,488 --> 00:05:26,030
We'll go ahead and
exit configuration

105
00:05:26,030 --> 00:05:28,190
on the route reflector.

106
00:05:28,190 --> 00:05:31,020
And now let's go ahead
and configure the clients.

107
00:05:31,020 --> 00:05:36,020
So here on router 1,
again, router bgp 100.

108
00:05:36,020 --> 00:05:38,630
We'll set our BGP router ID.

109
00:05:38,630 --> 00:05:41,570
We'll activate our
two address families.

110
00:05:41,570 --> 00:05:45,740
Then we'll configure our
neighbor, which is 10.12.12.12.

111
00:05:45,740 --> 00:05:50,390
And for that neighbor, we'll
set the remote-as to 100,

112
00:05:50,390 --> 00:05:53,750
set the update-source
to our lo0 interface,

113
00:05:53,750 --> 00:05:55,670
and activate the
address families

114
00:05:55,670 --> 00:05:57,830
for these individual neighbors.

115
00:05:57,830 --> 00:06:01,820
We'll commit those changes
and exit configuration.

116
00:06:01,820 --> 00:06:05,120
We can also see here
that neighbor 10.12.12.12

117
00:06:05,120 --> 00:06:07,190
has come up.

118
00:06:07,190 --> 00:06:08,960
Now router 2's
configuration is going

119
00:06:08,960 --> 00:06:11,490
to be almost identical
except, of course,

120
00:06:11,490 --> 00:06:13,880
for the BGP router
ID, so we'll just

121
00:06:13,880 --> 00:06:15,335
go ahead and copy and paste.

122
00:06:15,335 --> 00:06:17,890

123
00:06:17,890 --> 00:06:20,020
So we have the
configuration paste in.

124
00:06:20,020 --> 00:06:24,450
And once again, we see
that router 12 has come up.

125
00:06:24,450 --> 00:06:27,850
Finally, let's
configure router 5.

126
00:06:27,850 --> 00:06:31,930
At this point, we've
configured BGP on iOS XE

127
00:06:31,930 --> 00:06:33,470
quite a few times.

128
00:06:33,470 --> 00:06:36,560
So although this
is specific here,

129
00:06:36,560 --> 00:06:38,800
I think if we just paste
the configuration in,

130
00:06:38,800 --> 00:06:41,480
we can just talk about
what we've configured.

131
00:06:41,480 --> 00:06:44,090
So we'll paste in
the configuration.

132
00:06:44,090 --> 00:06:46,730
So as we can see, the
neighbor has come up here.

133
00:06:46,730 --> 00:06:48,880
And as far as the
configuration, it's

134
00:06:48,880 --> 00:06:51,790
a fairly standard
BGP configuration.

135
00:06:51,790 --> 00:06:56,890
We did turn off that default
address family for iOS XE.

136
00:06:56,890 --> 00:06:59,260
And then, of course,
we set up our neighbor

137
00:06:59,260 --> 00:07:03,430
10.12.12.12 with the
remote-as, the update-source.

138
00:07:03,430 --> 00:07:05,770
And then, of course,
we activated it

139
00:07:05,770 --> 00:07:10,840
and said send-community
both under both the VPNv4

140
00:07:10,840 --> 00:07:13,820
and the VPNv6 address families.

141
00:07:13,820 --> 00:07:16,400
So this all looks really good.

142
00:07:16,400 --> 00:07:19,660
Let's do our verification
up on the route reflector

143
00:07:19,660 --> 00:07:22,400
because it should see
all the neighbors.

144
00:07:22,400 --> 00:07:24,550
So on the route reflector
here, we'll simply

145
00:07:24,550 --> 00:07:30,730
do a sh bgp vpnv4 uni all summ.

146
00:07:30,730 --> 00:07:34,450
And we can see that we do,
in fact, have neighbors 1, 2,

147
00:07:34,450 --> 00:07:38,560
and 5 currently up in AS 100.

148
00:07:38,560 --> 00:07:42,140
Now, again, we haven't
sent any prefixes yet,

149
00:07:42,140 --> 00:07:45,140
so under the state prefix
received field, of course,

150
00:07:45,140 --> 00:07:48,430
it's zeros, but this does
indicate that our neighborships

151
00:07:48,430 --> 00:07:51,790
are up and working for VPNv4.

152
00:07:51,790 --> 00:07:56,260
We can do the exact same
command simply change this v6.

153
00:07:56,260 --> 00:07:59,440
And we can see that those
neighbors are ready to exchange

154
00:07:59,440 --> 00:08:02,330
address family VPNv6 as well.

155
00:08:02,330 --> 00:08:06,130
So that takes care of
configuring multi-protocol BGP

156
00:08:06,130 --> 00:08:08,940
in our core.

157
00:08:08,940 --> 00:08:11,610
So in this video,
we simply saw how

158
00:08:11,610 --> 00:08:15,240
to configure multi-protocol
BGP in our core

159
00:08:15,240 --> 00:08:17,820
to support Layer 3 VPN.

160
00:08:17,820 --> 00:08:23,730
We set up support for both
VPNv4 and VPNv6 addressing.

161
00:08:23,730 --> 00:08:26,640
We see it was really just
the exact same config,

162
00:08:26,640 --> 00:08:29,250
just change which address
family we're putting

163
00:08:29,250 --> 00:08:30,930
the configuration under.

164
00:08:30,930 --> 00:08:33,600
We also saw how to use
our route reflector

165
00:08:33,600 --> 00:08:36,480
and how we can simplify
the configuration there

166
00:08:36,480 --> 00:08:38,820
by using some peer templates.

167
00:08:38,820 --> 00:08:43,110
Now we're ready to set
up our CE-PE protocol

168
00:08:43,110 --> 00:08:46,530
so we can actually start getting
some routes from the customers

169
00:08:46,530 --> 00:08:48,640
to pass through
to the other side.

170
00:08:48,640 --> 00:08:51,520
And that's exactly
what we get to do next.

171
00:08:51,520 --> 00:08:54,810
Until then, I hope this has
been informative for you,

172
00:08:54,810 --> 00:08:57,860
and I'd like to thank
you for viewing.

173
00:08:57,860 --> 00:09:02,000