Rs Modules - Avaya 8800 Installation Manual

The FTAP ASIC interfaces each DPM to the switch fabric/CPU (SF/CPU) modules through the
Ethernet Routing Switch 8800/8600 switching backplane.
The FOQ management system collects information about the state of queues, packet storage
elements, and the fabric. This information is available to the F
segmented for entry to the fabric. When congestion occurs, BFM modules use fabric feedback
information from this point to drop packets.
FOQ also provides information about the state of each egress queue and the fullness of the
2
F E reassembly function buffers and queues. The F
Manager FPGA on each module. The constellation of these FOQ FPGAs (one for each DPM)
drives a shared backplane bus that each FPGA senses. Therefore, each R module can access
pertinent information about the state of all other R modules in the system.
Among R modules, the 8648GTR is potentially 2.4:1 oversubscribed on both lanes; the
8630GBR, the 8683XLR, and the 8683XZR all operate at line rate.

RS modules

The Ethernet Routing Switch 8800/8600 supports four RS modules. RS modules use a two-
or three-lane forwarding module called the Distributed Processing Module 2 (DPM2).
Architecturally, the DPM2 is based on the R module DPM. The DPM2 provides three flexible
forwarding engines and uses RSP version (RSP2.6), F
and surrounding logic.
All RS modules have built-in priority queueing. All RS modules support jumbo frames.
RS modules are comprised of two parts: the Port Interface Module (PIM) and the DPM2. The
PIM is an interface option daughter-card and requires the DPM for configuration, power, and
forwarding engine support.
Use RS modules to provide high port density and data rates, as well as enhanced port mirroring
and custom Auto-Negotiation (CANA) functionality.
You must use the 8692SF/CPU with the supermezz or the 8895SF/CPU with either 8004 or
8005 type power supplies in a chassis that contains RS modules. RS modules are not
compatible with the 8001AC and 8002DC power supplies or the 8691SF/CPU modules. RS
modules can interoperate with R modules. For proper system cooling, RS modules require
high-speed cooling modules.
The following list describes the RS module architecture:
• The 8648GTRS modules use a two-lane design. The 8648GTRS is potentially 2.4:1
oversubscribed on both lanes. Typical network designs use oversubscribed modules at
the building distribution layer and nonoversubscribed links to the core. The use of
Installation — Modules
2
I at the point where packets are
2
E reports this information to the FOQ
E version (2.1), a coprocessor, FPGAs,
2
RS modules
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