Intel NETWORK PROCESSOR IXP2800 - Manual (Page 299)

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