display interface brief

Function

The display interface brief command displays brief information about the status and configuration of interfaces.

Format

display interface brief [ main ]

Parameters

Parameter	Description	Value
main	Displays brief information about an Ethernet main interface.	-

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

Usage Scenario

The display interface brief command displays brief information about interfaces, including the physical status, link layer protocol status, inbound and outbound bandwidth usage within a certain period, and numbers of sent and received error packets. This information helps locate faults on interfaces.

Precautions

To clear statistics on an interface, run the reset counters interface command.

Example

# Display brief information about the status and configuration of interfaces.

<HUAWEI> 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                                                                
(lp): Loop-detect block                                                         
(ms): MACsec down
(o): Observe-port forwarding down
InUti/OutUti: input utility/output utility                                      
Interface                   PHY   Protocol InUti OutUti   inErrors  outErrors   
GigabitEthernet0/0/1        up    up       0.06%   100%          0   21217388   
GigabitEthernet0/0/2        up    up        100%   100%          0          0   
GigabitEthernet0/0/3        up    up          0%   100%          0          0   
GigabitEthernet0/0/4        up    up        100%   100%          0          0   
GigabitEthernet0/0/5        up    up         99%   100%          0          0   
GigabitEthernet0/0/6        down  down        0%     0%         10          0   
GigabitEthernet0/0/7        down  down        0%     0%         12          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       down  down        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       down  down        0%     0%          0          0   
MEth0/0/1                   down  down        0%     0%          0          0   
NULL0                       up    up(s)       0%     0%          0          0

**Table 1** Description of the **display interface brief** command output
Item	Description
Interface	Type and number of an interface.
PHY	Physical status of an interface: up: indicates that the interface is working properly. down: indicates that the physical layer of the interface fails. ^down: Administratively Down, indicating that the administrator has run the shutdown* command on the interface. ^down: indicates that the interface is a backup interface. #down: LBDT down, indicating that loop detection is enabled on the interface. The interface is shut down when the device detects a loop on the downstream network or between interfaces. (l): indicates that the loopback function is enabled on the interface. (b): indicates that the physical layer of the interface is in BFD down state.
Protocol	Link layer protocol status of the interface: up: indicates that the interface is working properly. down: indicates that the link layer protocol fails. up(lp)/down(lp): indicates that the interface status is Block due to the loop detected by the L2VPN loop detection function on the interface. (s): indicates that the spoofing function is enabled on the interface. (E): indicating that the Eth-Trunk goes down because of the E-Trunk negotiation failure. (b): indicates that the link layer of the interface is in BFD down state. (e): indicates that the link layer of the interface is in ETHOAM down state. (dl): indicates that the link layer of the interface is in DLDP down state. (lb): indicates that the interface is blocked due to loops on the downstream network or between interfaces. (lp): indicates that the interface status becomes Down due to loops in the VLAN where the interface resides. (ms): indicates that the link layer of the interface is in MACsec down state because MACsec is not enabled on the peer interface. NOTE: (ms): MACsec down is displayed only after the MACsec plug-in is installed. Only the S5720-SI, S5720S-SI, S5720-HI, S5720-EI, S5730-HI, S6720-SI, and S6720-EI support MACsec. (o): indicates that the interface status becomes Down because the packet forwarding function is disabled on the observing port or in the observing port group where the port resides.
InUti	Average inbound bandwidth usage of an interface within the last 300 seconds. Average inbound bandwidth usage within the last 300 seconds = Average inbound traffic rate within the last 300 seconds/Interface bandwidth When the average bandwidth usage is smaller than 0.005% and greater than 0, the value 0 is displayed. When the average bandwidth usage is smaller than 0.01% and greater than 0.005%, the value 0.01% is displayed. When the interface bandwidth becomes lower, for example, the speed command is executed to reduce the bandwidth of an Ethernet interface, the bandwidth usage be displayed as 100% because the traffic volume is not adjusted in time. "--" indicates that an interface does not support the display of bandwidth usage.
OutUti	Average outbound bandwidth usage within the last 300 seconds. Average outbound bandwidth usage within the last 300 seconds = Average outbound traffic rate within the last 300 seconds/Interface bandwidth When the average bandwidth usage is smaller than 0.005% and greater than 0, the value 0 is displayed. When the average bandwidth usage is smaller than 0.01% and greater than 0.005%, the value 0.01% is displayed. When the interface bandwidth becomes lower, for example, the speed command is executed to reduce the bandwidth of an Ethernet interface, the bandwidth usage may be displayed as 100% because the traffic volume is not adjusted in time. "--" indicates that an interface does not support the display of bandwidth usage.
inErrors	The number of error packets received by an interface. The value ranges from 0 to 4294967295. The count restarts after the value exceeds the upper limit. The value becomes 0 when you run the reset counters interface command in the user view or when the number of received packets reaches the maximum value 0xFFFFFFFF.
outErrors	The number of error packets sent by an interface. The value ranges from 0 to 4294967295. The count restarts after the value exceeds the upper limit. The value becomes 0 when you run the reset counters interface command in the user view or when the number of sent packets reaches the maximum value 0xFFFFFFFF.