How to determine whether an LSR has GR capabilities

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You can run the display ldp session verbose command to check GR capabilities of LDP sessions, and values of the GR Reconnect timer and GR Recovery timer. If the Session FT Flag field is On, the LSR has GR capabilities.

Other related questions:
How to determine whether a switch is in the process of LDP GR
If a device is during the LDP GR, you can run the display mpls graceful-restart command to check the GR information of all MPLS-related protocols, including the GR status, GR begin time, and GR type.

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.

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