plz check the software version of CE6850 first, like this:
HUAWEI> display version
Huawei Versatile Routing Platform Software
VRP (R) software, Version 8.120 (CE6850EI V200R001C00)
Copyright (C) 2012-2016 Huawei Technologies Co., Ltd.
HUAWEI CE6850-48S4Q-EI uptime is 2 days, 1 hour, 1 minute
CE6850-48S4Q-EI(Master) 1 : uptime is 2 days, 1 hour, 0 minute
StartupTime 2016/03/07 09:38:00
Memory Size : 2048 M bytes
Flash Size : 1024 M bytes
NVRAM Size : 512 K bytes
CE6850-48S4Q-EI version information
1. PCB Version : CEM48S4QP01 VER A
2. MAB Version : 1
3. Board Type : CE6850-48S4Q-EI
4. CPLD1 Version : 103
5. CPLD2 Version : 103
6. BIOS Version : 361