Juniper Networks J-Series manual Enabling Packet Capture, Navigate to the Forwarding options

J-series™ Services Router Administration Guide

Table 134: Enabling Packet Capture

Task	J-Web Configuration Editor
Navigate to the Forwarding options	1.	In the J-Web interface, select
level in the configuration hierarchy.		Configuration>View and Edit>Edit
		Configuration.
	2.	Next to Forwarding options, click
		Configure or Edit.
	3.	Next to Scripts, click Configure or
		Edit.

CLI Configuration Editor

From the [edit] hierarchy level, enter

edit forwarding-options

Specify in bytes the maximum size of each packet to capture in each file—for example, 500. The range is between 68 and 1500, and the default is 68 bytes.

4.Next to Commits, click Configure or Edit.

In the configuration editor hierarchy, select Forwarding options.

1.From the Sampling or packet capture list, select Packet capture.

2.Next to Packet capture, click Configure.

3.In the Maximum capture size box, type 500.

Enter

set packet-capture maximum-capture-size 500

Specify the target filename for the	In the Filename box, type pcap-file.		Enter
packet capture file—for example,
pcap-file. For each physical interface,			set packet-capture file filename pcap-file
the interface name is automatically
suffixed to the filename—for
example, pcap-file.fe-0.0.1.
(See the interface naming
conventions in the J-series Services
Router Basic LAN and WAN Access
Configuration Guide.)
Specify the maximum number of files	In the Files box, type 100.		Enter
to capture—for example, 100. The
range is between 2 and 10,000, and			set packet-capture file files 100
the default is 10 files.
Specify the maximum size of each	In the Size box, type 1024.		Enter
file in bytes—for example, 1024. The
range is between 1,024 and			set packet-capture file size 1024
104,857,600, and the default is
512,000 bytes.
Specify if all users have permission	1.	Next to World readable, select Yes.	Enter
to read the packet capture files.	2.	Click OK.
			set packet-capture file world-readable

258■ Configuring Packet Capture with a Configuration Editor