Kontron AT8940 - Manual (Page 28)

Board Features
13 AT8910/AT8940
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• BCM56842 320Gbps Switching Capacity.
• Support of up 14 Fabric IF to backplane running at 1000Base-X, 10GBASE-KX4, 10GBase-KR or 40GBase-
KR4
• Support one port 40GBase-KR4 HUB interlink to backplane
• Support of 2 40G interfaces to RTM.
• Support of 4 1G/10G SFP+ front uplinks with Broadcom BCM84754 Quad XFI to SFI transceiver.
• SFP+/QSFP monitoring via I2C interface
• Unit Computer manages Fabric Switch via PCIe Gen1 x1 (2.5Gbps)
2.4.1 Fabric Switch
2.4.1.1 10G Option (BCM56842 320 Gbps)
The Broadcom BCM56842 320 Gbps Ethernet Multilayer Switch with 18 integrated Warp Cores builds the core
of the 10G Fabric Interface. The Warp Cores are set in the required transfer mode; XFI, XAUI or 10GBASE-KR.
The 18 Warp Core cores are separated into four groups:
• Group 0: Warpcore[4:0] with 84 Gbps bandwidth
• Group 1: Warpcore[8:5] with 80 Gbps bandwidth
• Group 2: Warpcore[13:9] with 80 Gbps bandwidth
• Group 3: Warpcore[17:14] with 80 Gbps bandwidth
An additional 4 Gbps is allowed in Group 0 if WarpCore 0 is configured as 4x 1 GbE
The configuration of the Fabric Switch needs to limit the maximum bandwidth within the WarpCore Group.
The port mapping is defined in a way the maximum bandwidth could be reached in different chassis and
applications.
Table 2-2:Fabric Switch Port Assignment
CLI Port Type Speed
0/1 SFP+ 1/10GbE
0/2 SFP+ 1/10GbE
0/3 SFP+ 1/10GbE
0/4 SFP+ 1/10GbE
0/5 1- Hub 1/10GbE
0/6 2- Node-Board 1/10GbE
0/7 3- Node-Board 1/10GbE
0/8 4- Node-Board 1/10GbE