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Hardware Reference Manual 299
Intel
®
IXP2800 Network Processor
Media and Switch Fabric Interface
8.9.2.3 Framer, Single Network Processor Ingress and Egress, and
CSIX-L1 Chips for Translation and Fabric Interface
To interface to existing standard CSIX-L1 fabric interface chips, a translation bridge can be
employed, as shown in Figure 109. Translation between the network processor interface and
standard CSIX-L1 is very simple by design.
8.9.2.4 CPU Complex, Network Processor, and Fabric Interface Chip
If a processor card requires access to the fabric, a single network processor can provide both
ingress and egress access to the fabric for the processor via the PCI interface, as shown in
Figure 110. In many cases the available aggregate peak bandwidth of 4.2 Gb/s is sufficient for the
processor’s capacity.
Figure 109. Framer, Single Network Processor Ingress, Single Network Processor Egress,
CSIX-L1 Translation Chip and CSIX-L1 Fabric Interface Chip
B2747-01
Translation
Chip
DDR LVDS
to
CSIX-L1
HSTL
CSIX-L1
Fabric
Interface
Chip
Framer
Flow
Control
PCI
Ingress
Intel
®
IXP2800
Network
Processor
Egress
Intel IXP2800
Network
Processor
Figure 110. CPU Complex, Network Processor, and Fabric Interface Chips
B2748-01
Fabric
Interface
Chip
CPU
Memory
Controller
Memory
PCI
Ingress
Intel
®
IXP2800
Network
Processor