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Advanced O&M Command Reference

OceanStor 2800 V5 V500R007

This document is applicable to OceanStor 2800 V5. Based on the CLI, this document describes how to use various commands classified by functions and how to set the CLI and manage the storage system through these commands. The document that you browse online matches the latest C version of the product. Click Download to download documents of other C versions.
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The command is used to obtain network packet header information, excluding user sensitive data.

Format [-i ?][-w ?][-c ?][src ?][and | or][dst ?][and | or][port ?][-k]|[-a]|[-h]






Sets the listening network interface.

Network interface name.


Sets a file to save the packets.

The value contains 1 to 80 ASCII characters including digits, letters, underscores (_), at sign (@), periods (.), and hyphens (-).


Sets the number of network packets.

The value is an integer from 1 to 16000.


Sets the listening source address.

IP address.


Sets the listening destination address.

IP address.


Sets the listening port.

Transport layer port number, ranging from 0 to 65535.


The filter conditions are "and" relationships that support SRC, DST, and port parameters.



The filter conditions are "or" relationships that support SRC, DST, and port parameters.



Kills execution of background commands.



Shows help information.



Displays functions of each subcommand of the tcpdump module.



Minisystem mode

Usage Guidelines



  • Obtain the network packet header information.
    Storage:minisystem> -i eth2 -c 5 src and dst -w test.cap 
    Command executes in the background, and the result will be saved to /OSM/coffer_log/log/tcpdump/test.cap. 
    tcpdump: listening on eth2, link-type EN10MB (Ethernet), capture size 64 bytes 
  • Obtain the network packet header information, the result is syntax error.
    Storage:minisystem> -i eth2 -c 5 src dst 
    tcpdump: syntax error 

System Response

The following table describes the parameter meanings.



packets captured

Number of obtained packets.

packets received by filter

Number of filtered packets.

packets dropped by kernel

Number of dropped packets.

Updated: 2019-07-11

Document ID: EDOC1000181575

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