Juniper Networks J-Series manual Packet Capture Results and Output Summary

Chapter 12: Using Services Router Diagnostic Tools

Table 114: Packet Capture Field Summary (continued)

Field	Function
Write Packet	Writes the captured packets to a file in PCAP format
Capture File	in /var/tmp. The files are named with the prefix
	jweb-pcapand the extension .pcap.
	If you select this option, the decoded packet headers
	are not displayed on the packet capture page.

Your Action

■To save the captured packet headers to a file, select this check box.

■To decode and display the packet headers on the J-Web page, clear this check box.

Packet Capture Results and Output Summary

Figure 25 on page 229 shows J-Web packet capture output from router1, with the level of detail set to brief. Table 115 on page 229 summarizes the output in the packet capture display.

Figure 25: Packet Capture Results Page

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Table 115: J-Web Packet Capture Results and Output Summary

Field	Description
timestamp	Time when the packet was captured. The timestamp 00:45:40.823971 means 00 hours (12.00 a.m.), 45
	minutes, and 40.823971 seconds.
	NOTE: The time displayed is local time.
direction	Direction of the packet. Specifies whether the packet originated from the Routing Engine (Out), or was
	destined for the Routing Engine (In).
protocol	Protocol for the packet.
	In the sample output, IP indicates the Layer 3 protocol.
source address	Hostname, if available, or IP address and the port number of the packet's origin. If the Don't Resolve
	Addresses check box is selected, only the IP address of the source is displayed.
	NOTE: When a string is defined for the port, the packet capture output displays the string instead of the
	port number.
destination address	Hostname, if available, or IP address of the packet's destination with the port number. If the Don't Resolve
	Addresses check box is selected, only the IP address of the destination and the port are displayed.
	NOTE: When a string is defined for the port, the packet capture output displays the string instead of the
	port number.
protocol	Protocol for the packet.
	In the sample output, TCP indicates the Layer 4 protocol.

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