Devices’ Features and Data Paths | Switching Unit |
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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
S2 MByte internal memory
SHost management interface
SSupport for 1000 MII/GMII/RGMII and 1000Base−X
SManual and auto−negotiation
SSupport for jumbo frame length of 10KByte packets
SOn−chip 4K MAC address table
S4K VLANs with 256 active VLANs
SFlexible 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
128 | PENT/ATCA−717 |
