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Chapter 56 Diagnostics
ISG50 User’s Guide
740
Host Port This field is configurable when you set the IP Type to any, tcp, or udp.
Specify the port number of traffic to capture.
Continuously capture
and overwrite old ones
Select this to have the ISG50 keep capturing traffic and overwriting old
packet capture entries when the available storage space runs out.
Save data to onboard
storage only
Select this to have the ISG50 only store packet capture entries on the
ISG50.
Save data to USB
storage
Select this to have the ISG50 store packet capture entries only on a USB
storage device connected to the ISG50.
Status:
Unused - the connected USB storage device was manually unmounted by
using the Remove Now button or for some reason the ISG50 cannot
mount it.
none - no USB storage device is connected.
available - you can have the ISG50 use the USB storage device. The
available storage capacity also displays.
Note: The ISG50 reserves some USB storage space as a buffer.
Captured Packet Files When saving packet captures only to the ISG50’s onboard storage, specify
a maximum limit in megabytes for the total combined size of all the
capture files on the ISG50.
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 is 1 to 10000. The ISG50 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.
Split threshold Specify a maximum size limit in megabytes for individual packet capture
files. After a packet capture file reaches this size, the ISG50 starts another
packet capture file.
Duration Set a time limit in seconds for the capture. The ISG50 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 File Size field. 0 means there is
no time limit.
File Suffix 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”.
Number Of Bytes To
Capture (Per Packet)
Specify the maximum number of bytes to capture per packet. The ISG50
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.
Table 296 Maintenance > Diagnostics > Packet Capture (continued)
LABEL DESCRIPTION