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Ethernet Routing Switch 8600 module fundamentals
Figure 36
8691 SF/CPU module
The 8691 SF/CPU module consists of a printed circuit board with status
LEDs, a management port, a data communications equipment (DCE)/data
terminal equipment (DTE) switch for the console port, a console port,
a modem port, a reset button, and a Personal Computer Memory Card
International Association (PCMCIA) card slot.
ATTENTION
For Release 5.0 and later, Nortel recommends that you use a PCMCIA card of
not less than 256 MB storage capacity.
The CPU subsystem uses a PowerPC CPU and includes 128 MB of
synchronous dynamic random access memory (SDRAM). The 8691
SF/CPU supports Ethernet Routing Switch 8600 Release 3.7 with 128
MB SDRAM. Later releases (for example, 4.1) can require a memory
upgrade kit (DS1411016) to upgrade to 256 MB SDRAM. For memory
upgrade information, see Nortel Ethernet Routing Switch 8600 Upgrades
— Software Release 5.0, NN46205-400.
The 8691 SF/CPU-256 (DS1404090) is functionally identical to the 8691
SF/CPU, except that it has 256 MB of SDRAM installed. You can identify
the 8691 SF/CPU-256 by the front panel model number label in the
upper-right corner as 8691SF/256.
The 8691 SF/CPU module contains 16 MB of onboard flash memory used
to store the image file, and 2 MB of boot memory (ROM). The routing
switch fabric uses 10 MB of shared, high-speed memory. This memory
buffers traffic destined for interface modules. The switch logic allocates
memory to the various switch priority queues according to traffic usage and
current switch configuration.
In all Ethernet Routing Switch 8600 chassis (other than the 8003 chassis)
you can install an 8691 SF/CPU module in both slots 5 and 6 of the
chassis to enable redundant operation. The redundant module in slot
6 can then assume the processing duties of a failing primary module in
slot 5.
Nortel Ethernet Routing Switch 8600
Installation — Modules
NN46205-304
02.02
Standard
16 June 2008
Copyright © 2008 Nortel Networks
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Summary of Contents for Passport 8600 Series
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