Cisco Catalyst 4500 Series Command Reference Guide

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Catalyst 4500 Series Switch Cisco IOS Command Reference—Release IOS XE 3.4.0SG and IOS 15.1(2)SG)
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Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches
monitor capture file location buffer-size
monitor capture file location buffer-size
To specify the capture destination, use the monitor capture command. To remove the details, use the
no form of this command.
monitor capture name [[file location filename [buffer-size <1-100>] [ring <2-10>] [size
<1-100>]] | [buffer [circular] size <1-100>]]
]no monitor capture name [file | buffer]
Syntax Description
Defaults The default buffer size is one MB.
Command Modes Privileged EXEC mode
Command History
Usage Guidelines The capture destination can be a file in storage disk or a memory buffer. This command specifies the
parameters related to packet storage.
The file option specifies that the packets must be stored to a file. To reduce or avoid any loss in packet
capture, you can use the buffer-size option. The capture and store operations require more CPU, limiting
the capture throughput.
You can increase the throughput by triggering lock-step mode, wherein the packets are first captured in
the buffer. Within this mode, the “duration” parameter defines the capture duration. Once the buffer is
full or the duration closes, the buffer is written to the file, greatly increasing the capture throughput. The
lock-step mode is automatically triggered by specifying the buffer size to 32MB or higher.
The size of the capture file can be limited with the size option. The file location must one of the
following:
• Internal bootflash (bootflash: )
• External flash (slot0: )
• USB (usb0: )
file location filename Specifies filename of location.
buffer-size <1-100> Specifies bufer size in MB.
ring <2-10> Specifies number of files.
size <1-100> Specifies the file size.
buffer [circular] size <1-100> Specifies that the capture destination is a buffer. By default, the
mode is linear.
The keyword circular sets the buffer mode to circular.
The keyword size specifies the buffer size.
Release Modification
IOS XE 3.3.0SG/
15.1(1)SG
Support for this command was introduced on the Catalyst 4500 series switch.

Cisco Catalyst 4500 Series Specifications

General

Series	Catalyst 4500 Series
Category	Switch
Layer Support	Layer 2, Layer 3
Form Factor	Modular chassis
Stackable	No
Chassis Slots	3, 6, 7, 10
Power Supply Options	AC, DC
Redundancy	Power supply, Supervisor engine
Network Management	Cisco IOS Software CLI, SNMP, Cisco Prime Infrastructure
Features	Security, QoS
Port Density	Up to 384 ports per chassis
Security Features	802.1X, ACLs, DHCP Snooping, Dynamic ARP Inspection, IP Source Guard
Supervisor Engine	8-E