display emdi statistics history bier channel

Function

The display emdi statistics history bier channel command displays historical statistics of bier channel on a specified board in the upstream direction.

The display emdi statistics history bier outbound channel command displays historical statistics of bier channel on a specified board in the downstream direction.

This command is supported only on the NetEngine 8000 F1A.

Format

display emdi statistics history bier channel [ source source-address group group-address ] [ start start-index end end-index ] slot slot-id

display emdi statistics history bier outbound channel [ source source-address group group-address ] [ start start-index end end-index ] slot slot-id

display emdi statistics history bier outbound channel [ source source-address group group-address ] latest-record record-number slot slot-id

display emdi statistics history bier channel [ source source-address group group-address ] latest-record record-number slot slot-id

Parameters

Parameter	Description	Value
source source-address	Specifies a channel source address.	The value is in dotted decimal notation.
group group-address	Specifies a channel group address.	The value is in dotted decimal notation.
start start-index	Specifies the start index of historical statistics of a specified channel.	The value is an integer ranging from 1 to 1000.
end end-index	Specifies the end index of historical statistics of a specified channel.	The value is an integer ranging from 1 to 1000 and must be greater than or equal to start-index.
slot slot-id	Specifies a slot ID.	The value range varies with the hardware of the device.
latest-record record-number	Specifies the number of latest records of a specified channel.	The value is an integer ranging from 1 to 5.

Views

All views

Default Level

1: Monitoring level

Task Name and Operations

Task Name	Operations
emdi	read

Usage Guidelines

Usage Scenario

After EMDI detection is implemented on video traffic transmitted on a device, to view historical statistics about bier channel on a specified board in the upstream direction, run the display emdi statistics history bier channel command. To view historical statistics about bier channel on a specified board in the downstream direction, run the display emdi statistics history bier outbound channel command. In addition, you can configure the start start-index and end end-index parameters to specify the start index and end index of historical records or configure the latest-record record-number parameter to specify the number of the latest records to be queried. If these parameters are not specified, all historical records are queried.

Precautions

Only abnormal traffic information is collected, including packet loss, disorder, and traffic interruption. If the command output is all 0s, traffic is interrupted.
When a user joins or leaves a multicast group, traffic is interrupted. When the user joins the multicast group again, traffic is restored. On the ingress PE and P nodes, if there is no complete statistical period of all statistics being 0s before the user joins the multicast group again (that is, traffic interruption and recovery are completed within two statistical periods), the traffic interruption scenario cannot be identified. In this case, the packet loss and disorder statistics are collected in one period, and the statistics in the next period are normally collected. If there is a complete statistical period of all statistics being 0s (that is, traffic interruption and recovery are completed not within two statistical periods), the traffic interruption scenario can be identified. In the current period, the packet loss and disorder statistics are not collected in one period, and the statistics in the next period are normally collected.
Different devices have different aging time, and there is a time difference between the upstream and downstream data aging on the same device. As a result, the upstream and downstream statistics of the same flow may be displayed differently on different devices or even in the upstream and downstream flow tables on the same device. After an end user exits for a long time (one hour at most), all statistics are deleted, so that all devices provide the same statistics display.
For example:
When a user joins a multicast group, some packets are lost or out of order. The historical statistics are displayed. When the user leaves and rejoins the multicast group, the egress PE is associated with multicast and deletes the ACL entries. In this case, the historical statistics age, and no command output is displayed. The ingress PE and P nodes cannot be associated with multicast so that the corresponding upstream and downstream entries are deleted only after being aged. If new traffic matches non-aging entries in the flow table within the aging time, the flow table and original historical statistics will not be aged. That is, historical statistics can be queried on the ingress PE and P nodes. In addition, if a user is added to the multicast group again when one of the upstream and downstream flow tables is aged and deleted and the other table is being aged, this table stops being aged, and the statistics continue to be collected. In this case, the upstream and downstream information of the same device is inconsistent.

Example

The actual command output varies according to the device. The command output here is only an example.

# Display the statistics of downstream.

<HUAWEI> display emdi statistics history bier outbound channel slot 1
Source Address:192.168.2.100    Group Address:225.0.0.1        Vpn Label:256                                                        
Bfir Id:1      Sub Domain:0      Bsl:256    SI:0   Token:9
Interface      : GigabitEthernet0/1/1
Total Records  : 2         Latest Rate(pps) : 188226              Latest Detect Time : 2021-02-18 21:30:50
-----------------------------------------------------------------------------------------------------------------------------------------------
Record          Record        Monitor   Monitor    Received      Rate         Rate         RTP-LC      RTP-SE        RTP-LR       RTP-SER
Index           Time         Period(s)  Status     Packets       pps          bps                                   (1/100000)   (1/100000)
-----------------------------------------------------------------------------------------------------------------------------------------------
1       2019-08-08:21-13-10     10      Normal     0             0            0            0           0             0            0
2       2019-08-08:21-12-50     10      Normal     0             0            0            0           0             0            0
---------------------------------------------------------------------------------------------------------------------

# Display the statistics of upstream.

<HUAWEI> display emdi statistics history bier channel slot 1
Source Address:192.168.2.100    Group Address:225.0.0.1        Vpn Label:256
Bfir Id:1      Sub Domain:0      Bsl:256    SI:0                                                   
Total Records  : 4         Latest Rate(pps) : 188226              Latest Detect Time : 2021-02-18 21:30:50
-----------------------------------------------------------------------------------------------------------------------------------------------
Record          Record        Monitor   Monitor    Received      Rate         Rate         RTP-LC      RTP-SE        RTP-LR       RTP-SER
Index           Time         Period(s)  Status     Packets       pps          bps                                   (1/100000)   (1/100000)
-----------------------------------------------------------------------------------------------------------------------------------------------
1       2019-08-08:21-11-30     10      Normal     0             0            0            0           0             0            0
2       2019-08-08:21-11-20     10      Normal     0             0            0            0           0             0            0
3       2019-08-08:21-11-10     10      Normal     0             0            0            0           0             0            0
4       2019-08-08:21-11-00     60      Normal     0             0            0            0           0             0            0
-----------------------------------------------------------------------------------------------------------------------------------------------

**Table 1** Description of the **display emdi statistics history bier channel** command output
Item	Description
Source Address	Source address.
Group Address	Group address.
Vpn Label	Vpn Label.
Bfir Id	Bfir ID.
Sub Domain	Sub domain.
Interface	Interface name.
Total Records	Records number.
Latest Rate(pps)	Latest rate.
Latest Detect Time	Latest detect time.
Record Index	Index of a historical record.
Record Time	Time when a historical statistic is recorded.
Monitor Period(s)	Monitoring period.
Monitor Status	Monitoring status. Normal: The EMDI detection is normal. CAR Drop: The rate of video streams exceeds the threshold, and the EMDI detection is abnormal. Rate Only: Only the rate of video streams is detected.
Received Packets	Number of received packets.
Rate pps	Rate of video streams, in packets/second.
Rate bps	Rate of video streams, in bits/second. The item indicates a Layer 3 rate.
RTP-LC	Number of lost packets.
RTP-SE	Number of disorderly packets.
RTP-LR(1/100000)	Packet loss rate.
RTP-SER(1/100000)	Packet disorder rate.
Bsl	Bit string length.
SI	SI value.
Token	Multicast leaf token.