Spare Allocation Examples - ClearCube R1200 User Manual

Table 7 R4300 Daisy-Chain Distance Limitations
C/Port Model
Distance from R4300
Admin Daisy Chain (# of chassis)
Spare Daisy Chain (# of chassis)
C/Port Model
Distance from R4300
Admin Daisy Chain (# of chassis)
Spare Daisy Chain (# of chassis)
C/Port Model
Distance from R4300
Admin Daisy Chain (# of chassis)
Spare Daisy Chain (# of chassis)
C/Port Model
Distance from R4300
Admin Daisy Chain (# of chassis)
Spare Daisy Chain (# of chassis)
R Series Data Center Products User's Guide, Rev. B
Daisy Chain uses the same ClearCube proprietary data link that connects blades
to C/Ports.
Table 7 shows the distance and node limitations on the Admin and Spare Daisy
Chains for various C/Ports used with the R4300.
C7100 (p/n 091024)
10M 100M
14
14
C7120 (p/n 091056)
10M 100M
14
14
C7120W (p/n 091169)
10M 100M
14
14
C7130 (p/n 091154) rev C02 or lower C7130 (p/n 091154) rev D01 or higher
10M 100M
8
4

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 blades (configured by daisy-chaining the spare connections). Figure 22
shows these sparing scenarios as examples.
NOTE: Sparing is a switching function of the R4300 chassis. If no spare blade is
connected to the Spare Daisy Chain, or if the Spare blade is completely
powered down, the spare switch action will succeed but the user will not be
connected to a usable blade.
150M 200M
14 14 14
14 14 14
150M 200M
14 14 14
14 14 14
150M 200M
14 14 14
14 14 14
150M 200M
7 7 6
4 5 2
C7110 (p/n 091052 or 091055)
10M 100M 150M
14 14 14
14 14 14
C7100–C7120 + MVX
10M 100M 150M
14 14 14
14 14 14
C7120W + MVX
10M 100M 150M
14 14 11
14 14 8
10M 100M 150M
10 10 12
9 9 10
Chassis and Blade Installation • 47
200M
14
14
200M
14
14
200M
5
0
200M
14
11