Modules; Sf/Cpu Modules - Avaya 8800 Planning And Engineering, Network Design

Hardware fundamentals and guidelines
When using the second method, take into consideration the number of power supplies and
redundancy. The worse-case power draw is the maximum power draw plus the number of supplies
required to operate the system without redundancy.
For example, if two 8005AC power supplies power a chassis, and a third is added for redundancy,
the worse-case value is the maximum power draw of a single 8005AC power supply times two (the
total of two power supplies, not three). For the 8005AC power supplies, the actual draw depends on
the input voltage. For a nominal input voltage of 110 VAC, the draw is 1140 watts (W). For 220 AC
volts (VAC), the draw is 1462 W. For a three-power supply system running at 110 VAC, the
maximum worse-case power draw is 1140 W x 2, or 2280 W. Therefore this system requires a
cooling capacity of 7164 British thermal units (BTU).
You also need to consider the cooling requirements of the power supplies themselves. For more
information about these specifications, see Avaya Ethernet Routing Switch 8800/8600 Installation —
AC Power Supply, NN46205-306 and Avaya Ethernet Routing Switch 8800/8600 Installation — DC
Power Supply, NN46205-307. Add these values to the cooling capacity calculation. For a multiple
power supply system, you need to factor into the calculation the maximum nonredundant number of
power supplies.
You must also consider the type of module installed on the chassis. If you install an RS or 8800
module in the chassis, you must install the high speed cooling modules. If you do not install the high
speed cooling modules, the software cannot operate on the module. For information about installing
high speed cooling modules, see Avaya Ethernet Routing Switch 8800/8600 Installation — Cooling
Module, NN46205-302.
Design a cooling system with a cooling capacity slightly greater than that calculated to maintain a
safe margin for error and to allow for future growth.

Modules

Use modules to interface the switch to the network. This section discusses design guidelines and
considerations for Avaya Ethernet Routing Switch 8800/8600 modules.

SF/CPU modules

The switch fabric/CPU (SF/CPU) module performs intelligent switching and routing. Every chassis
must have at least one SF/CPU; for redundancy, install two SF/CPUs.
Release 7.0 supports only the 8895 SF/CPU and the 8692 SF/CPU with SuperMezz. The 8692
SF/CPU must be equipped with the Enterprise Enhanced CPU Daughter Card (SuperMezz) for
proper functioning with Release 7.0 and later. The 8895 SF/CPU has SuperMezz capabilities built
into the module, and so does not support a SuperMezz card.
The use of dual 8692 SF/CPU or 8895 SF/CPU modules enables a maximum switch bandwidth of
512 Gbit/s. Dual modules provide redundancy and load sharing between the modules. Split
MultiLink Trunking (SMLT) in the core in a resilient cluster configuration (redundant switch with two
June 2016 Planning and Engineering — Network Design
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