ZyXEL Communications NXC2500 User Manual page 359

Table 185 Maintenance > Diagnostics > Packet Capture (continued)
LABEL
Host IP
Host Port
Continuously capture
and overwrite old ones
Save data to onboard
storage only
Save data to USB
storage
Captured Packet Files
Split threshold
Duration
File Suffix
Number Of Bytes To
Capture (Per Packet)
Chapter 31 Diagnostics
DESCRIPTION
Select a host IP address object for which to capture packets. Select any to capture
packets for all hosts. Select User Defined to be able to enter an IP address.
This field is configurable when you set the Protocol Type to any, tcp, or udp.
Specify the port number of traffic to capture.
Select this to have the NXC keep capturing traffic and overwriting old packet capture
entries when the available storage space runs out.
Select this to have the NXC only store packet capture entries on the NXC. The
available storage size is displayed as well.
Note: The NXCL reserves some onboard storage space as a buffer.
Select this to have the NXC store packet capture entries only on a USB storage
device connected to the NXC.
Status:
Unused - the connected USB storage device was manually unmounted by using the
Remove Now button or for some reason the NXC cannot mount it.
none - no USB storage device is connected.
available - you can have the NXC use the USB storage device. The available storage
capacity also displays.
service deactivated - the USB storage feature is disabled and the NXC cannot use
a connected USB device to store the system log and other diagnostic information.
Note: The NXC reserves some USB storage space as a buffer.
When saving packet captures only to the NXC's onboard storage, specify a maximum
limit in megabytes for the total combined size of all the capture files on the NXC.
When saving packet captures to a connected USB storage device, specify a
maximum limit in megabytes for each capture file.
Note: If you have existing capture files and have not selected the Continuously
capture and overwrite old ones option, you may need to set this size larger or
delete existing capture files.
The valid range depends on the available onboard/USB storage size. The NXC stops
the capture and generates the capture file when either the file reaches this size or
the time period specified in the Duration field expires.
Specify a maximum size limit in megabytes for individual packet capture files. After
a packet capture file reaches this size, the NXC starts another packet capture file.
Set a time limit in seconds for the capture. The NXC stops the capture and generates
the capture file when either this period of time has passed or the file reaches the
size specified in the Captured Packet Files field. 0 means there is no time limit.
Specify text to add to the end of the file name (before the dot and filename
extension) to help you identify the packet capture files. Modifying the file suffix also
avoids making new capture files that overwrite existing files of the same name.
The file name format is "interface name-file suffix.cap", for example "vlan2-packet-
capture.cap".
Specify the maximum number of bytes to capture per packet. The NXC automatically
truncates packets that exceed this size. As a result, when you view the packet
capture files in a packet analyzer, the actual size of the packets may be larger than
the size of captured packets.
NXC Series User's Guide
359