Nortel Networks 8005DC - Manual (Page 22)

22 Metro Ethernet Routing Switch 8600 modules
(MAC) and Physical Layer Controls (PHY) as well as the physical interfaces
for direct network connections. A single PIM interconnects with a single
DPM to form a Metro Ethernet Routing Switch 8600 Module. Modules with
DPMs are R modules.
Metro Ethernet Routing Switch 8600 modules that use the BFM are pre-E,
E, or M modules. These modules are described in
"Metro Ethernet Routing
Switch 8600 pre-E, E, and M modules feature set" (page 21) .
Each DPM contains either two or three lanes, depending on the module.
Both the 8630GBR and the 8683XLR modules consist of three lanes. The
8648GTR module consists of two lanes. Each lane is also known as a
Flexible Forwarding Engine (FFE). The FFE lane is the basis for the Metro
Ethernet Routing Switch 8600 R modules. The FFE lane consists of:
• Two Flexible Route Switch Processors—ingress Route Switch Processor
2 (RSP2) and egress RSP2
• One egress packet handling ASIC–F2E
• One ingress packet handling ASIC–F2I
"Metro Ethernet Routing Switch 8600 R module packet flow on ingress and
egress" (page 22)
shows the Metro Ethernet Routing Switch 8600 R module
packet flow on ingress and egress.
Metro Ethernet Routing Switch 8600 R module packet flow on ingress and
egress
The ingress RSP2 performs lookups, filtering and classification operations,
and modifies the IP and MAC headers within the body of the packet to
reflect routing and switching decisions.
Nortel Metro Ethernet Routing Switch 8600
Installation — Modules
NN46220-306 02.02 Standard
4.2 7 July 2008
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