Huawei CX600-X1-M Series Hardware Description page 44

HUAWEI CX600-X1-M/CX600-X2-M Series Metro
Services Platform
Hardware Description
Table 2-1 Slot layout of the CX600-X2-M8
Slot
1 to 8
9 and 10
11 and 12
13 and 14
15
NOTE
Board Working Modes Supported by the CX600-X2-M8
The CX600-X2-M8 supports the master/slave and load balancing working modes for NPUs.
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An FIC refers to a subcard on which every port works at a rate of lower than 1 Gbit/s. An HIC refers to a
subcard on which every port works at a rate of at least 1 Gbit/s.
Other subcards, including the 8-Channel CWDM Multiplexing/Demultiplexing Physical Interface Card
and Auxiliary Flexible Interface Card.
When the 4x10GE-SFP+ subcard is installed, the NPU-120 or NPU-120-E must also be installed. In
addition, the 4x10GE-SFP+ subcard must be installed in one of the four slots close to the NPU.
For the CX600-X2-M8 that has the NPU-50/NPU-50-E installed, 2-port 10GBase subcard cannot be
installed in both slot 1 and slot 8. It is recommended that you insert a 10GE PIC into a slot close to the
NPU.
Master/slave
– In master/slave mode, the master NPU forwards services of all subcards, and the slave
NPU is a hot standby backup. The slave NPU takes over the services only when the
master NPU is unavailable, for example, when the master NPU fails or restarts. This
implementation prevents service interruptions when the master NPU is unavailable.
– In master/slave mode, each NPU manages all the eight subcards, PICs 1 to 8 in
2-7.
Load balancing
– In load balancing mode, two NPUs forward services of their managed subcards
respectively to load balance the total traffic of all subcards. If one NPU is unavailable,
the other NPU will not take over services on the unavailable NPU. Therefore, the load
balancing mode is less reliable than the master/slave mode.
– In load balancing mode, each NPU manages only the subcards in the same half board
cage as the NPU itself. For example, in the board layout shown in
manages PICs 1 to 4, and NPU 10 manages PICs 5 to 8. If NPU 10 is unavailable,
NPU 9 will not take over the services of PICs 5 to 8.
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2 CX600-X2-M8 Hardware Description
Remarks
For PICs, which include HICs, FICs and the other subcards.
For NPUs.
For MPUs, which are in 1:1 backup.
For PSUs, which are in 1+1 backup.
For the fan frame.
Figure
Figure 2-7, NPU 9
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