How to determine whether the underlying link of the storage system is unstable?

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You can view the statistics of error codes of the storage system on the ISM interface to determine whether the service link is unstable. The procedure is as follows:
1. Log in to the ISM, expand the storage device, and select Settings. Click Bit Error Statistics in the function pane. The Bit Error Statistics dialog box is displayed.
2. In the Port Type drop-down list box, select the port on which the statistics of error codes is to be made.
3. View the information displayed in the group box. Use iSCSI host port as an example, view the statistics of Number of error packets, Number of Lost packets, and Number of overflowed packets in the table. If the statistics fluctuates fiercely, it indicates that the underlying link is unstable.

Other related questions:
What's the plan for configuring disk enclosures of V3 storage systems?
You can use eDesigner, a storage configuration tool to plan the configuration of V3 storage disk enclosures. To obtain eDesigner, click Link.

How to determine whether an AP is faulty
Determine whether an AP is faulty using the following methods: 1. Check whether the AP indicators are in normal state. For description of AP indicators, see Indicator Description in the Hardware Installation and Maintenance Guide of an AP. 2. Log in to the AP through the console port, Telnet/STelnet, or the web system, and check whether the login succeeds. Fit APs do not support the web system. - If the login succeeds, the AP works properly. - If the login fails, restore the factory settings of the AP by holding down Default, and then log in to the AP again. If a Fit AP has been added to an AC offline, run the display ap all command on the AC to view the AP state. If the AP state is normal or download but not fault, the AP works properly.

How can I determine whether an AP is qualified
1. If the AP is in any state except fault, for example, normal and download, the AP is qualified. [AC6605] display ap all V200R005 and earlier versions: All AP information: Normal[4],Fault[1],Commit-failed[0],Committing[0],Config[0],Download[0] Config-failed[0],Standby[0],Type-not-match[0],Ver-mismatch[0] ------------------------------------------------------------------------------ AP AP AP Profile AP AP /Region ID Type MAC ID State Sysname ------------------------------------------------------------------------------ 0 AP6510DN-AGN 1047-80ac-cc60 0/101 fault ap-0 1 AP5010DN-AGN 60de-4474-9640 0/0 normal ap-1 2 AP7110DN-AGN dcd2-fc04-b500 0/102 normal ap-2 ------------------------------------------------------------------------------ Total number: 5,printed: 5 V200R006 and later versions: Total AP information: nor : normal [3] ------------------------------------------------------------------------------------- ID MAC Name Group IP Type State STA Uptime ------------------------------------------------------------------------------------- 0 60de-4476-e360 area_1 ap-group1 10.23.100.254 AP6010DN-AGN nor 0 25S 1 dcd2-fc9d-0bb0 area_2 ap-group1 10.23.100.253 AP6010DN-AGN nor 0 20S 2 dcd2-fc04-b500 area_3 ap-group1 10.23.100.252 AP6010DN-AGN nor 0 10S ------------------------------------------------------------------------------------- Total: 3 NOTE: The preceding method applies to the scenario where an AP is added offline, for example, the AP is generated using configuration file or is manually added offline. If the AP is not added offline but you can still view information about the AP on the AC, the AP is working properly regardless of its status. 2. Observe whether the AP indicator works normally. See description of indicators in installation guide of the packaging to determine whether AP indicators are working properly. 3. You can determine whether an AP is qualified by logging in to the AP. Before the login, ensure that the network cable used to connect to the AP is working properly. NOTE: If the AP needs to connect to an Ethernet switch, ensure that the Ethernet cable is working properly. If the Ethernet cable is not working properly, for example, RJ-45 connectors are short-circuited, the AP may fail to be powered on or fail to work properly. Before connecting an Ethernet cable to the AP, use the cable test tool to check whether the cable is qualified. If the cable is unqualified, replace it. a. Check whether you can log in to the AP through the serial interface and enter the CLI. Connect the AP and PC using the serial cable. - Log in to the AP through the serial interface. On the AP serial interface, the baud rate is 9600 bit/s, the data bit is 8, the stop bit is 1, and there is no parity bit. - If the login succeeds, the AP is working properly. b. Check whether you can use a command to log in to the AP through the serial interface. NOTE: The default IP address of the AP is 169.254.1.1. Enter the default user name admin and initial password admin@huawei.com. - Assign the PC with an IP address on the same network segment as the default IP address of the AP. Connect the network cable to the AP and PC. - Log in to the AP using Telnet. If the login succeeds, the AP is working properly. If the login fails, reset the AP to restore the factory settings. Then, log in to the AP again.

How to determine whether CPU usages of the system and processes are high for S series switches
For S series switches (except the S1700), the system CPU usage is within a normal range when the following conditions are met: - The CPU usage does not exceed 80% when the system runs for a long period. - The CPU usage does not exceed 95% in a short period and does not keep increasing. - No high CPU usage alarm is generated. In the following situations, the system may generate an alarm when CPU usage becomes high instantly and then clear this alarm rapidly: Cards just start. Information about all optical modules is queried at a time. Traffic volume increases instantly. This situation is a normal situation and does not affect the device operation. CPU usage of a CPU task process may become low or high, depending on the service volume and processing time. CPU usage is within a normal range as long as the system CPU usage does not exceed 80% and no high CPU usage alarm is generated. For possible causes and common troubleshooting procedures for high CPU usage, see the following: - For the S12700, see "High CPU Usage > Common Information" in S12700 Troubleshooting - Preliminary. - For the S7700 and S9700, see "High CPU Usage > Common Information" in S7700&S9700 Troubleshooting - Preliminary. - For the S1720, S2700, S3700, S5700, and S6700, see "High CPU Usage > Common Information" in S1720&S2700&S3700&S5700&S6700 Troubleshooting - Preliminary. - For the S9300, see "High CPU Usage > Common Information" in S9300 Troubleshooting - Preliminary. - For the S600-E, see "High CPU Usage > Common Information" in S600-E Troubleshooting - Preliminary.

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