Packet Capture Commands; Capture {Start | Stop; Capture {File | Remote | Line - NETGEAR M4100 Series ProSAFE Reference Manual

Packet Capture Commands

Packet capture commands assist in troubleshooting protocol-related problems with the
management CPU. The packets to and from the management CPU can be captured in an
internally allocated buffer area for export to a PC host for protocol analysis. Public domain
packet analysis tools like Ethereal can be used to decode and review the packets in detail.
Capturing can be performed in a variety of modes, either transmit-side only, receive-side only,
or both. The number of packets captured will depend on the size of the captured packets.

capture {start | stop}

Use the capture start command to manually start capturing CPU packets for packet
trace. Capturing packets is stopped automatically when 128 packets are captured and have
not yet been displayed during a capture session. It is guaranteed that packets not displayed
and not saved will not be lost when capturing is in progress. Use the capture stop
command to manually stop capturing CPU packets for packet trace before the moment when
128 packets are captured and capturing packets is stopped automatically.The packet capture
operates in three modes:
• Capture file
• Remote capture
• Capture line
The command is not persistent across a reboot cycle.
Format
capture {start | stop} {transmit | receive | all}
Mode Privileged EXEC

capture {file | remote | line}

Use this command to configure file capture options. The command is persistent across a
reboot cycle.
Default Remote
Format
capture {file | remote | line}
Mode Global Config
Parameter Description
In capture file mode, the captured packets are stored in a file on NVRAM. The
file
maximum file size defaults to 524,288 bytes. The switch can transfer the file to a TFTP
server via TFTP, SFTP, SCP via CLI, web and SNMP. The file is formatted in pcap
format, is named cpuPktCapture.pcap, and can be examined using network
analyzer tools such as Wireshark
terminates any remote capture sessions and line capturing. After the packet capture is
activated, the capture proceeds until the capture file reaches its maximum size, or
until the capture is stopped manually using the CLI command capture stop.
M4100 Series ProSAFE Managed Switches
®
by Ethereal
Utility Commands
400
®
. Starting a file capture automatically