CH121 mezzanine cards

The CH121 mainboard provides two mezzanine card connectors that connect to switch or pass-through modules through the chassis midplane.
Mezz1 is the upper mezzanine card and Mezz2 is the lower one.
CPU1 provides x16 PCIe links to connect to Mezz1 and Mezz2.
Mezz1 connects to slots 2X and 3X at the rear of the chassis. Mezz2 connects to slots 1E and 4E.

The CH121 supports expansion of GE, 10GE, 40GE, 8G FC, or 16G FC ports through mezzanine cards. For details about the supported mezzanine cards, see the compatibility checker:
http://support.huawei.com/onlinetoolsweb/ftca/en

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