display diagnostic-information
Function
The display diagnostic-information command collects and displays all the current diagnostic information or saves diagnostic information in a specified file.
Format
display diagnostic-information [ acl | ap | arp | bfd | decoding | defend | dhcp | engine | evpn | gpm | l2adp | l3adp | lbdt | lldp | mcast | mpls | qos | rrpp | sa | sdk | smlk | srm | sta | stack | stat | stp | ucm | vxlan ] [ file-name ]
Only the S5720-EI, S5720-HI, S5720I-SI, S5720S-SI, S5720-SI, S5735-S, S5735S-S, S5735-S-I, S5730-HI, S5730S-EI, S5730-SI, S5731-H, S5731-S, S5731S-H, S5731S-S, S5732-H, S6720-EI, S6720-HI, S6720S-EI, S6720S-SI, S6720-SI, S6730-H, S6730S-H, S6730-S, and S6730S-S support bfd.
Only the S5720-EI, S5720-HI, S5730-HI, S5731-H, S5731S-H, S5732-H, S6720-EI, S6720-HI, S6720S-EI, S6730S-H, and S6730-H support mpls.
Among S5720-EI switches running V200R009C00 and later versions, only some switches support the MPLS feature. Run the display device capability command on the switch to check the switch's software and hardware capabilities. The switch supports the MPLS feature only when chips also support the MPLS feature.
Only the S5720-EI, S5720-HI, S5730-HI, S5731-H, S5731-S, S5731S-H, S5731S-S, S5732-H, S6720-EI, S6720-HI, S6720S-EI, S6730-H, S6730S-H, S6730-S, and S6730S-S support sdk.
The stack parameter is supported on a stack only.
Only the S5720-HI, S5730-HI, S5731-H, S5731-S, S5731S-H, S5732-H, S6720-HI, S6730S-H, and S6730-H support ap and sta.
- Only the S5720-HI, S5730-HI, S5731-H, S5731-S, S5731S-H, S5731S-S, S5732-H, S6720-EI, S6720-HI, S6720S-EI, S6730-H, S6730S-H, S6730-S, and S6730S-S support vxlan and evpn.
Parameters
Parameter |
Description |
Value |
|---|---|---|
acl |
Displays ACL information. |
- |
ap |
Displays AP information. |
- |
arp |
Displays ARP information. |
- |
bfd |
Displays BFD information. |
- |
defend |
Displays attack defense information. |
- |
decoding |
Displays decoding information. |
- |
dhcp |
Displays DHCP information. |
- |
engine |
Displays engine information. |
- |
evpn |
Displays EVPN information. |
- |
gpm |
Displays GPM information. |
- |
l2adp |
Displays L2 information. |
- |
l3adp |
Displays L3 information. |
- |
lbdt |
Displays LBDT information. |
- |
lldp |
Displays LLDP information. |
- |
mcast |
Displays multicast information. |
- |
mpls |
Displays MPLS information. |
- |
qos |
Displays QoS information. |
- |
rrpp |
Displays RRPP information. |
- |
sa |
Displays SA information. |
- |
sdk |
Displays sdk information. |
- |
smlk |
Displays Smart Link information. |
- |
stack |
Displays stack information. |
- |
srm |
Displays device information. |
- |
sta |
Displays STA information. |
- |
stat |
Displays basic statistic information. |
- |
stp |
Displays STP information. |
- |
ucm |
Displays UCM module information. |
- |
vxlan |
Displays VXLAN module information. |
- |
file-name |
Specifies the name of the file where diagnostic information is stored. |
The value is a string of 5 to 64 characters. The file name extension must be .txt. The default directory where files are stored is flash:/. |
Usage Guidelines
Usage Scenario
When a fault occurs in the system, you can use the display diagnostic-information command to collect diagnostic information for fault location.
The display diagnostic-information command output includes the output for multiple display commands, such as display clock, display version, and display current-configuration. Running the display diagnostic-information command is like running these display commands in batches.
Precautions
- If the file-name parameter is not specified, diagnostic information is only displayed on the screen. If the file-name parameter is specified, diagnostic information is only stored to a specified file but not displayed on the screen, and the command level is management level (3).
- The command output does not support split-screen display.
If this command displays a long output, press Ctrl+C to abort this command.
This command displays diagnostic information, which helps locate faults but may affect system performance. For example, CPU usage may become high. Therefore, do not use this command when the system is running properly.
Running the display diagnostic-information command simultaneously on multiple terminals connected to the device is prohibited. This is because CPU usage of the device may obviously increase and the device performance may be degraded.
When you run this command, the device obtains or uses some personal data of users, such as the STA MAC address. Delete the personal data immediately after the command is executed to ensure user data security.
Example
# Display diagnostic information about the device.
<HUAWEI> display diagnostic-information
===========================================================
===============display interface brief===============
===========================================================
PHY: Physical
*down: administratively down
#down: LBDT down
(l): loopback
(s): spoofing
(E): E-Trunk down
(b): BFD down
(e): ETHOAM down
(dl): DLDP down
(lb): LBDT block
InUti/OutUti: input utility/output utility
Interface PHY Protocol InUti OutUti inErrors outErrors
Eth-Trunk5 down down 0% 0% 0 0
Eth-Trunk9 down down 0% 0% 0 0
GigabitEthernet0/0/1 *down down 0% 0% 0 0
GigabitEthernet0/0/2 *down down 0% 0% 0 0
GigabitEthernet0/0/3 *down down 0% 0% 0 0
GigabitEthernet0/0/4 *down down 0% 0% 0 0
GigabitEthernet0/0/5 up up 0% 0% 0 0
GigabitEthernet0/0/6 *down down 0% 0% 0 0
GigabitEthernet0/0/7 down down 0% 0% 0 0
GigabitEthernet0/0/8 *down down 0% 0% 0 0
GigabitEthernet0/0/9 down down 0% 0% 0 0
GigabitEthernet0/0/10 down down 0% 0% 0 0
GigabitEthernet0/0/11 up up 0% 0% 0 0
GigabitEthernet0/0/12 down down 0% 0% 0 0
GigabitEthernet0/0/13 down down 0% 0% 0 0
GigabitEthernet0/0/14 down down 0% 0% 0 0
GigabitEthernet0/0/15 down down 0% 0% 0 0
GigabitEthernet0/0/16 down down 0% 0% 0 0
GigabitEthernet0/0/17 down down 0% 0% 0 0
GigabitEthernet0/0/18 down down 0% 0% 0 0
GigabitEthernet0/0/19 down down 0% 0% 0 0
GigabitEthernet0/0/20 *down down 0% 0% 0 0
GigabitEthernet0/0/21 down down 0% 0% 0 0
GigabitEthernet0/0/22 *down down 0% 0% 0 0
GigabitEthernet0/0/23 down down 0% 0% 0 0
GigabitEthernet0/0/24 up up 0% 0% 0 0
......
# Save diagnostic information to the file aa.txt in the flash memory.
<HUAWEI> display diagnostic-information aa.txt
Now saving the diagnostic information to the device
100%
Info: The diagnostic information was saved to the device successfully.