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HUAWEI CLOUD Stack 6.5.0 Alarm and Event Reference 04

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ALM-1301021 EVS/OVS-DPDK Forwarding Capability Exceeds the Threshold

ALM-1301021 EVS/OVS-DPDK Forwarding Capability Exceeds the Threshold

Description

This alarm is generated when the forwarding capability of the elastic virtual switch (EVS) or Open Virtual Switch (OVS)-DPDK reaches the upper limit.

Attribute

Alarm ID

Alarm Severity

Auto Clear

1301021

Major

Yes

Parameters

Name

Meaning

Name

Specifies the alarm name.

Object ID

Specifies the alarm object ID.

If an alarm is generated for a resource, such as a host or VM, the value is the resource ID, for example, the host ID. If an alarm is generated for a service module, the value is the ID of the service module, for example, FusionSphere OpenStack OM.

Object Type

Specifies the alarm object type. Example values: host and heart beat (indicating the heartbeat detection system).

Object Name

Specifies the object for which the alarm is generated.

If an alarm is generated for a resource, such as a host or VM, the value is the resource name, for example, the host name. If the alarm is generated for a service module, the value is the name of the service module, for example, FusionSphere OpenStack OM.

Component Type

Specifies the type of the component that reports the alarm, for example, FusionSphere OpenStack or FusionSphere OpenStack OM.

Component

Specifies the component that reports the alarm.

Fault Location Info

Provides detailed information about the alarm object, usually in the form of key value pairs. For example: host=*****,portName=###, indicating that the alarm is generated on port ### of host ****.

Additional Info

Provides additional information about the alarm, usually in the form of key value pairs. For example: Threshold=70,current_value=75, indicating that the alarm is generated because the threshold is 70 and the current value is 75.

Generated At

Specifies the time when the alarm is generated.

Cleared At

Specifies the time when the alarm is cleared.

Clearance Type

Specifies how the alarm is cleared (manually or automatically).

Cleared By

Specifies the name of the user who clears the alarm. This parameter is left blank if the alarm is automatically cleared.

Alarm Clearance User ID

Specifies the ID of the user who clears the alarm. This parameter is left blank if the alarm is automatically cleared.

Alarm Cleared At

Specifies the system view (tenant view or administrator view) in which the alarm is manually cleared.

SN

Specifies the sequence number of the alarm.

Impact on the System

Packet loss occurs on the virtual port, affecting ongoing services.

Possible Causes

  • The traffic on the virtual switch uplink port is greater than that of EVS/OVS-DPDK forwarding packets.
  • Excessive broadcast traffic is generated on the virtual switching network.
  • The software interrupt distribution is imbalanced. As a result, packets are processed on a CPU for a long time, and other packets cannot be executed promptly.

Procedure

  1. Log in to the FusionSphere OpenStack web client.

    For details, see Logging In to the FusionSphere OpenStack Web Client (ManageOne Mode).

  2. On the Summary page, obtain the management IP address of the host in the OM IP Address column based on the host ID or host name in the alarm additional information.
  3. Use PuTTY to log in to the host for which the alarm is generated using the management IP address of the host.

    The default user name is fsp. The default password is Huawei@CLOUD8.

    The system supports both password and public-private key pair for identity authentication. If the public-private key pair is used for login authentication, see detailed operations in Using PuTTY to Log In to a Node in Key Pair Authentication Mode.

  4. Run the following command and enter the password of user root to switch to user root:

    su - root

    The default password of user root is Huawei@CLOUD8!.

  1. Run the following commands to query the EVS/OVS-DPDK physical port and uplink port of the bond:

    ovs-vsctl --timeout=120 find interface type=dpdkphy | grep ^name | awk -F ':' '{print $2}' | tr -d '"'

    ovs-vsctl --timeout=120 find interface type=dpdkbond | grep ^name | awk -F ':' '{print $2}' | tr -d '"'

  2. Run the following command to query the bridge of the uplink port queried in 5:

    ovs-vsctl port-to-br port_name

    port_name indicates the port queried in 5.

  3. Run the following command to query the ofproto port number of the bridge queried in 6:

    ovs-ofctl show br_name

    br_name indicates the bridge name obtained in 6.

  4. Run the following command to observe the change of the number of received packets on the uplink port within 10s, calculate the packet per second (pps) on the uplink port, and compare the pps with the traffic of EVS/OVS-DPDK forwarding packets to check whether the traffic is greater than or equal to the traffic of EVS/OVS-DPDK forwarding packets.

    ovs-ofctl dump-ports br_name;sleep 10;ovs-ofctl dump-ports br_name

    br_name indicates the bridge name obtained in 6.

    • If yes, the inbound traffic to the host is heavy, exceeding the traffic of EVS/OVS-DPDK forwarding packets. In this case, identify the reason why the external network traffic is heavy.
    • If no, perform the following operations:
      • For the EVS bridge, go to 9.
      • For the OVS-DPDK bridge, go to 10.

  5. Run the following command to check whether abnormal broadcast packet loss persists:

    watch -d -n 1 ovs-appctl dpif-dpdk/show-mac-entry br_name --missed

    br_name indicates the bridge name obtained in 6.

    • If yes, a large number of broadcast packets exist, affecting the packet forwarding capability. Consequently, this alarm is generated. In this case, check the abnormal broadcast traffic.
    • If no, go to 10.

  6. After these operations are performed, if the alarm persists and the problem cannot be located, contact technical support for assistance.

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Updated: 2019-08-30

Document ID: EDOC1100062365

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