IBM NeXtScale System User Manual

148 IBM NeXtScale System Planning and Implementation Guide
5.7.2 50% blocking InfiniBand
Figure 5-20 shows a 50%-blocking (two node ports for every uplink port)
InfiniBand configuration. On the left side is a rack with six chassis for a total of 72
CPU nodes. Three 36-port InfiniBand switches and two 48-port 1 Gbps Ethernet
switches provide the network connectivity.
Figure 5-20 50% Blocking InfiniBand
36 Port IB 18 Down 18 UP
48 Port 1GBe 36 Down 2 10G Up
48 Port 1GBe 36 Down 2 10G Up
36 Port IB 18 Down 18 UP
36 Port IB 18 Down 18 UP
IB Switch 1
IB Switch 2
IB Switch 3
Cable Channel 1 Cable Channel 2
Cable Channel 3 Cable Channel 4
1
2
3
4
5
6
13
14
15
16
17
18
7
8
9
10
11
12
19
20
21
22
23
24
31
32
33
34
35
36
25
26
27
28
29
30
37
38
39
40
41
42
1G Ethernet Switch 1
1G Ethernet Switch 2
1
3
5
7
9
11
2
4
6
8
10
12
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3
5
7
9
11
2
4
6
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12
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Chassis 1
Chassis 2
Chassis 3
Chassis 4
Chassis 5
Chassis 6
48 Port 1GBe 36 Down 2 10G Up
36 Port IB 18 Down 18 UP
Chassis 1
Chassis 2
48 Port 1GBe 36 Down 2 10G Up
36 Port IB 18 Down 18 UP
Chassis 3
Chassis 4
36 Port IB 18 Down 18 UP
Chassis 5
Chassis 6
Building Block 1
Building Block 2
Building Block 2
Building Block 3
Filler panel: Filler panels (part number 00Y3011) are placed in rack unit 21
and 41 to prevent hot air recirculation.

IBM NeXtScale System Specifications

General

Brand	IBM
Model	NeXtScale System
Category	Server
Language	English