Help Center/ Virtual Private Cloud/ User Guide/ VPC Flow Log/ Viewing a VPC Flow Log
Updated on 2024-10-15 GMT+08:00
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Viewing a VPC Flow Log

Scenarios

This section describes how you can view the VPC flow log details.

The capture window is approximately 10 minutes, which indicates that a flow log record will be generated every 10 minutes. After creating a VPC flow log, you need to wait about 10 minutes before you can view the flow log record.

If flow logs cannot be collected after the VPC flow log is enabled, the possible causes are as follows:
  • If an ECS is in the stopped state, its flow log records will not be displayed.
  • The VPC flow log quota is insufficient. If you want to continue collecting flow logs, configure the quota.

Procedure

  1. Go to the VPC flow log list page.
  2. Locate the target VPC flow log and click View Log Record in the Operation column to view information about the flow log record in LTS.

    The flow log record is in the following format:

    <version> <project-id> <interface-id> <srcaddr> <dstaddr> <srcport> <dstport> <protocol> <packets> <bytes> <start> <end> <action> <log-status>

    Table 1 provides you with flow log examples.

    Table 1 Flow log examples

    Scenario

    Example Value

    A flow log record in which data was recorded during the capture window

    Value 1 indicates the VPC flow log version. Traffic with a size of 96 bytes to NIC 1d515d18-1b36-47dc-a983-bd6512aed4bd during the past 10 minutes (from 16:55:36 to 17:05:36 on January 29, 2019) was allowed. A data packet was transmitted over the UDP protocol from source IP address 192.168.0.154 and port 38929 to destination IP address 192.168.3.25 and port 53.

    1 5f67944957444bd6bb4fe3b367de8f3d 1d515d18-1b36-47dc-a983-bd6512aed4bd 192.168.0.154 192.168.3.25 38929 53 17 1 96 1548752136 1548752736 ACCEPT OK

    A flow log record in which no data was recorded during the capture window

    		 
    1 5f67944957444bd6bb4fe3b367de8f3d 1d515d18-1b36-47dc-a983-bd6512aed4bd - - - - - - - 1431280876 1431280934 - NODATA

    A flow log record in which data was skipped during the capture window

    		 
    1 5f67944957444bd6bb4fe3b367de8f3d 1d515d18-1b36-47dc-a983-bd6512aed4bd - - - - - - - 1431280876 1431280934 - SKIPDATA

You can enter a keyword on the log stream details page on the LTS console to search for flow log records.

Parent Topic: VPC Flow Log