Instruction Manual

AT8901M Hardware Description
Page 3 - 6 AT8901M User Guide
3.2 Base Switch
The base switch is a Broadcom BCM56500 (full featured version) or BCM56300 (lite featured
version) 24 port GbE multilayer switch that can operate in 10/100/1000 Mbps. It integrates ad-
vanced Layer 3 switching features for IPv4 and IPv6 routing. The BCM56500 also includes en-
hanced QoS support and jumbo packet line rate switching.
The PPC controls the switch over a 32bit/66MHz PCI Interface.
Base Interface (Zone 2)
The board supports 15+2 ATCA backplane channels. The board can operate in a dual star and
full mesh configuration. The switch is connected to the backplane via four 10/100/1000BASE-
T quad PHYs and eight 10/100/1000BASE-T dual magnetics. The pin assignment for the Zone
2 connectors is compliant to the PICMG 3.0 standard. GbE channels 0/20 and 0/24 of the
switch are the 100BASE-TX ShMC base channels (ShMC cross-connects).
Table 3-6: Base Interface Port Mapping
CLI ID Channel LED
0/1 Uplink 1 -
0/2 Uplink 2 -
0/3 Uplink 3 -
0/4 Uplink 4 -
0/5 16 16
0/6 15 15
0/7 14 14
0/8 13 13
0/9 12 12
0/10 11 11
0/11 10 10
0/12 9 9
0/13 8 8
0/14 7 7
0/15 6 6
0/16 5 5
0/17 4 4
0/18 3 3
0/19 2 2
0/20 SMCA 1
0/21 Local AMC B1, channel 0 -
0/22 Remote AMC B1, channel 1 -
0/23 Local AMC B2, channel 0 -
0/24 SMCB 1