Motorola ATCA-717 - Manual (Page 128)

Devices’ Features and Data Paths Switching Unit
128 PENT/ATCA−717
Switching Unit
The on−board switching unit is based on the Marvell 98DX160 Ethernet layer 2+ switch
and provides switching functionality between on−board Ethernet ports, PMC sites and
the backplane interfaces. It provides 16 Ethernet switching ports as well as one Serial
Management interface (SMI) and one additional Ethernet port for configuration.
aaa
Features
Important features of the switching unit are: aaa
S 2 MByte internal memory
S Host management interface
S Support for 1000 MII/GMII/RGMII and 1000Base−X
S Manual and auto−negotiation
S Support for jumbo frame length of 10KByte packets
S On−chip 4K MAC address table
S 4K VLANs with 256 active VLANs
S Flexible VLAN assignment for protocol− port− and tag−based VLANs
Management Interface
The switching unit provides two management interfaces towards the host: one slave
Serial Management Interface (SMI) and one CPU Ethernet port. The SMI interface is
accessible via FPGA registers and supports read and write accesses to address mapped
entities. The CPU Ethernet port is constituted by an Intel 82540EM GBit Ethernet
controller which is connected to the PCI interface of the blade
′s South Bridge. aaa
Routing Options
The blade is designed to support dual−dual star backplanes. However, the currently
available blade variants support only dual star backplanes. Ask your local Motorola
representative for more information on available blade variants and switch options.
a
Starting with blade revision 1.2, the blade provides support for PICMG 3.1 Option 2. This
is achieved by configuring two fabric interface ports as one 2 GBit Ethernet trunc. Details
are given below.
a