Spare allocation examples – ClearCube R-Series Data Center Products User Manual
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34 • Chassis and Blade Installation
R-Series Data Center Products User’s Guide
Primary, and RMMs on the chain all serve as Tertiary controllers. A Control
Chain can contain as many as 14 chassis.
•
Admin Daisy Chain – The link between an Admin C/Port and the chassis served
by that Admin C/Port. An Admin Daisy Chain can connect from 1 to 14 chassis
within a single Control Chain, depending on the model of the connected C/Port.
The Admin Daisy Chain uses the same ClearCube proprietary data link that
connects blades to C/Ports.
•
Spare Daisy Chain – The link between a Spare blade and the chassis served by
that Spare blade. A Spare Daisy Chain can connect from 1 to 14 chassis within a
single Control Chain, depending on the model of the connected C/Port. The Spare
Daisy Chain uses the same ClearCube proprietary data link that connects blades to
C/Ports.
Table 8 shows the distance and node limitations on the Admin and Spare Daisy
Chains for various C/Ports used with the R4300.
Spare Allocation Examples
When using the spare switching feature of the chassis, you must consider how to
arrange your spares and how many to use. The chassis can support a ratio of one spare
for one active PC blade. A more common ratio is one spare for every seven active
blades. The lowest ratio of sparing that ClearCube recommends is one spare for 47 PC
Table 8 R4300 Daisy-Chain Distance Limitations
C/Port Model
C7100 (p/n 091024)
C7110 (p/n 091052 or 091055)
Distance from R4300
10M
100M
150M
200M
10M
100M
150M
200M
Admin Daisy Chain (# of chassis)
14
14
14
14
14
14
14
14
Spare Daisy Chain (# of chassis)
14
14
14
14
14
14
14
14
C/Port Model
C7120 (p/n 091056)
C7100–C7120 + MVX
Distance from R4300
10M
100M
150M
200M
10M
100M
150M
200M
Admin Daisy Chain (# of chassis)
14
14
14
14
14
14
14
14
Spare Daisy Chain (# of chassis)
14
14
14
14
14
14
14
14
C/Port Model
C7120W (p/n 091169)
C7120W + MVX
Distance from R4300
10M
100M
150M
200M
10M
100M
150M
200M
Admin Daisy Chain (# of chassis)
14
14
14
14
14
14
11
5
Spare Daisy Chain (# of chassis)
14
14
14
14
14
14
8
0
C/Port Model
C7130 (p/n 091154) rev C02 or lower C7130 (p/n 091154) rev D01 or higher
Distance from R4300
10M
100M
150M
200M
10M
100M
150M
200M
Admin Daisy Chain (# of chassis)
8
7
7
6
10
10
12
14
Spare Daisy Chain (# of chassis)
4
4
5
2
9
9
10
11