ZyXEL ISG50-PSTN User Guide - Page 740

Chapter 56 Diagnostics Table 296 Maintenance > Diagnostics > Packet Capture (continued) LABEL Host Port Continuously capture and overwrite old ones Save data to onboard storage only Save data to USB storage DESCRIPTION This field is configurable when you set the IP Type to any, tcp, or udp. Specify the port number of traffic to capture. Select this to have the ISG50 keep capturing traffic and overwriting old packet capture entries when the available storage space runs out. Select this to have the ISG50 only store packet capture entries on the ISG50. 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. Captured Packet Files Note: The ISG50 reserves some USB storage space as a buffer. 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. Split threshold Duration File Suffix Number Of Bytes To Capture (Per Packet) 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. 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. 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. 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 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. 740 ISG50 User's Guide