当华为交换机设备发生异常时，可以通过查看设备信息检查状态是否正常
1、查看设备的部件信息和状态信息
[023wg.com]display device ?
slot Slot
| Matching output
[023wg.com]display device s
[023wg.com]display device slot ?
<0> The present slot
[023wg.com]display device slot 0
S3700-52P-SI-AC's Device status:
Slot Sub Type Online Power Register Status Role
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
0 - 3752F Present PowerOn Registered Normal Master
[023wg.com]
2、查看设备的制造信息
[023wg.com]display device manufacture-info[ slotslot-id| backplane ]
3、查看设备序列号
每台设备的序列号ESN（Equipment Serial Number）是唯一的。
[023wg.com] display esn
4、查看版本信息
通过查看设备当前的版本信息，可以判断设备是否需要升级或者升级是否成功。
[023wg.com]display version ?
slot Slot
| Matching output
[023wg.com]display version sl
[023wg.com]display version slot ?
<0> The registered slot
[023wg.com]display version slot 0
EMFEA 0(Master) : uptime is 0 week, 0 day, 0 hour, 18 minutes
128M bytes DDR Memory
16M bytes FLASH
Pcb Version : VER B
Basic BOOTROM Version : 248 Compiled at Jun 26 2012, 18:54:52
Software Version : VRP (R) Software, Version 5.70 (V100R006C03)
5、查看电源信息
当设备的供电出现异常时，用户可以执行以下命令查看设备的电源状态信息。
[023wg.com]display power
--------------------------------------------------------------------------
SlotID PowerNo Present Mode State Power(W) Voltage(V)
--------------------------------------------------------------------------
0 PWRI NO N/A N/A N/A N/A
0 PWRII NO N/A N/A N/A N/A
[023wg.com]
6、查看功率信息
如果想了解设备的使用功率的详细情况，可以查看功率信息。当系统扩容时，可以先确认电源功率是否足够。
7、查看单板电压
当设备单板的电压异常时，用户可以执行以下命令查看单板电压的状态信息。
display voltage { all | slotslot-id}
8、查看温度信息
设备温度过高或过低可能会导致硬件的损坏。如果想了解设备的当前温度值，可以执行以下命令查看温度信息。
9、查看风扇状态
风扇的正常运转是保证设备正常工作的前提。设备散热不正常会引起设备温度升高，并可能损坏硬件。
slot Slot
verbose Fan verbose information
display fan-para { all | slot slot-id } # 查看风扇额定功率和调速策略
10、查看CPU占用率
CPU占用率是衡量设备性能的重要指标之一。在网络运行中，CPU占用率过高常常会导致业务异常，例如BGP震荡、VRRP频繁切换甚至设备无法登录。
执行以下命令，可以实时查看CPU占用率的统计信息和配置信息，以保证设备能够运行在稳定状态。
通过查看CPU占用率的配置信息，可以查看当前CPU占用率的监控告警过载阈值和监控告警恢复阈值。当CPU占用率上升到监控告警过载阈值时，系统触发监控过载告警。当CPU占用率下降到监控告警恢复阈值时，系统触发监控恢复告警。
display cpu-usage # 查看CPU占用率的统计信息
CPU Usage Stat. Cycle: 60 (Second)
CPU Usage : 15% Max: 93%
CPU Usage Stat. Time : 2008-01-01 00:11:50
CPU utilization for five seconds: 15%: one minute: 15%: five minutes: 15%.
TaskName CPU Runtime(CPU Tick High/Tick Low) Task Explanation
BOX 0% 0/ 1d42314 BOX Output
_TIL 0% 0/ 0 Infinite loop event task
_EXC 0% 0/ 0 Exception Agent Task
VIDL 85% 1/2ffbd2fe DOPRA IDLE
TICK 0% 0/ 283c3ce
.........................................................................................
PPI 0% 0/ 1bf74e PPI Product Process Interface
IFPD 2% 0/ a53ca60 IFPD Ifnet Product Adapt
............................................................................................................
VT 0% 0/ 0 VT Virtual Transfer
OS 11% 0/2756ccff Operation System
display cpu-usage configuration ? # 查看CPU占用率的配置信息
slave Slave MPU
slot Specify the slot
The CPU usage monitor is turned on.
The current monitor cycle is 60 seconds.
The current monitor warning threshold is 95%.
The current monitor restore threshold is 80%.
11、查看内存占用率
内存占用率是衡量设备性能的重要指标之一。在网络运行中，内存占用率过高常常会导致业务异常。实时查看内存占用率信息，以确认设备是否运行稳定。
通过查看内存占用率门限值，可以查看监控告警触发条件。当内存占用率上升到门限值时，系统触发告警。当内存占用率低于门限值时，系统告警消除。
display memory-usage ? # 查看内存占用率的统计信息。
slave Slave MPU
slot Slot number
Memory utilization statistics at 2008-01-01 00:41:34 800 ms
System Total Memory Is: 75312648 bytes
Total Memory Used Is: 45037704 bytes
Memory Using Percentage Is: 59%
display memory-usage threshold [ slot slot-id ] # 查看内存占用率的门限值
12、查看环境监控软件版本信息
13、查看接口信息
当用户在某一接口下完成一组配置之后，需要验证是否配置正确，可以查看当前接口下的配置信息。当用户在监控接口的状态或检查接口的故障原因时，可以查看接口的状态信息。
13.1、查看接口的配置信息
[Huawei-Ethernet0/0/2]display this
#
interface Ethernet0/0/2
port link-type access
port default vlan 12
#
return
[Huawei-Ethernet0/0/2]
13.2、查看接口的状态信息
display interface Ethernet 0/0/2
Ethernet0/0/2 current state : DOWN
Line protocol current state : DOWN
Description:HUAWEI, Quidway Series, Ethernet0/0/2 Interface
Switch Port, PVID : 12, TPID : 8100(Hex), The Maximum Frame Length is 1600
IP Sending Frames' Format is PKTFMT_ETHNT_2, Hardware address is d4b1-10cf-057d
Port Mode: COMMON COPPER
Speed : 10, Loopback: NONE
Duplex: HALF, Negotiation: ENABLE
Mdi : AUTO
Last 300 seconds input rate 0 bits/sec, 0 packets/sec
Last 300 seconds output rate 0 bits/sec, 0 packets/sec
Input peak rate 0 bits/sec, Record time: -
Output peak rate 0 bits/sec, Record time: -
Input: 0 packets, 0 bytes
Unicast : 0, Multicast : 0
Broadcast : 0, Jumbo : 0
CRC : 0, Giants : 0
Jabbers : 0, Fragments : 0
Runts : 0, DropEvents : 0
Alignments : 0, Symbols : 0
Ignoreds : 0, Frames : 0
Discard : 0, Total Error : 0
Output: 0 packets, 0 bytes
Unicast : 0, Multicast : 0
Broadcast : 0, Jumbo : 0
Collisions : 0, Deferreds : 0
Late Collisions: 0, ExcessiveCollisions: 0
Buffers Purged : 0
Discard : 0, Total Error : 0
Input bandwidth utilization threshold : 100.00%
Output bandwidth utilization threshold: 100.00%
Input bandwidth utilization : 0.00%
Output bandwidth utilization : 0.00%
或
[Huawei-Ethernet0/0/2]display this interface
Ethernet0/0/2 current state : DOWN
Line protocol current state : DOWN
Description:HUAWEI, Quidway Series, Ethernet0/0/2 Interface
Switch Port, PVID : 12, TPID : 8100(Hex), The Maximum Frame Length is 1600
IP Sending Frames' Format is PKTFMT_ETHNT_2, Hardware address is d4b1-10cf-057d
Port Mode: COMMON COPPER
Speed : 10, Loopback: NONE
Duplex: HALF, Negotiation: ENABLE
Mdi : AUTO
Last 300 seconds input rate 0 bits/sec, 0 packets/sec
Last 300 seconds output rate 0 bits/sec, 0 packets/sec
Input peak rate 0 bits/sec, Record time: -
Output peak rate 0 bits/sec, Record time: -
Input: 0 packets, 0 bytes
Unicast : 0, Multicast : 0
Broadcast : 0, Jumbo : 0
CRC : 0, Giants : 0
Jabbers : 0, Fragments : 0
Runts : 0, DropEvents : 0
Alignments : 0, Symbols : 0
Ignoreds : 0, Frames : 0
Discard : 0, Total Error : 0
Output: 0 packets, 0 bytes
Unicast : 0, Multicast : 0
Broadcast : 0, Jumbo : 0
Collisions : 0, Deferreds : 0
Late Collisions: 0, ExcessiveCollisions: 0
Buffers Purged : 0
Discard : 0, Total Error : 0
Input bandwidth utilization threshold : 100.00%
Output bandwidth utilization threshold: 100.00%
Input bandwidth utilization : 0.00%
Output bandwidth utilization : 0.00%
[Huawei-Ethernet0/0/2]
14、查看流量进出入
查数量流入baidisplay counters inbound interface GigabitEthernet
查数量流出display counters outbound interface GigabitEthernet
查数据占用display counters rate outbound interface GigabitEthernet