148 NetApp AltaVault Cloud Integrated Storage Administration Guide
Beta Draft
Viewing reports and logs Capturing and uploading TCP dumps
Capture Parameters These parameters let you capture information about dot1q VLAN traffic. You can match traffic
based on VLAN-tagged or untagged packets, or both. You can also filter by port number or host IP
address and include or exclude ARP packets. Select one of these parameters for capturing VLAN
packets:
• Capture Untagged Traffic Only - Select this option for the following captures:
– All untagged VLAN traffic.
– Untagged 7850 traffic and ARP packets.
– Only untagged ARP packets.
• Capture VLAN-Tagged Traffic Only - Select this option for the following captures:
– Only VLAN-tagged traffic.
– VLAN-tagged packets with host 10.11.0.6 traffic and ARP packets. You must also specify
10.11.0.6 in the IPs field, and specify or arp in the custom flags field on this page.
– VLAN-tagged ARP packets only. You must also specify and arp in the custom flags field on
this page.
• Capture both VLAN and Untagged Traffic - Select this option for the following captures:
– All VLAN traffic.
– Both tagged and untagged 7850 traffic and ARP packets. You must also specify the following
in the custom flags field on this page:
(port 7850 or arp) or (vlan and (port 7850 or arp))
– Both tagged and untagged 7850 traffic only. You must also specify 7850 in one of the port
fields on this page. No custom flags are required.
– Both tagged and untagged ARP packets. You must also specify the following options in the
custom flags field on this page:
(arp) or (vlan and arp)
Capture Duration
(Seconds)
Specify a positive integer to set how long the capture runs, in seconds. The default value is 30.
Specify 0 or continuous to initiate a continuous trace.
For continuous capture, NetApp recommends specifying a maximum capture size and a nonzero
rotate file number to limit the size of the TCP dump.
Maximum Capture Size Specify the maximum capture file size, in megabytes. The default value is 100. After the file
reaches the maximum capture size, TCP dump starts writing capture data into the next file, limited
by the Number of Files to Rotate field.
NetApp recommends a maximum capture file size of 1024 MB (1 GB).
Buffer Size Optionally, specify the maximum amount of data, in kilobytes, allowed to queue while awaiting
processing by the capture file. The default value is 154 KB.
Snap Length Optionally, specify the snap length value for the capture file, which equals the number of bytes
captured for each packet. Having a snap length smaller than the maximum packet size on the
network enables you to store more packets, but you might not be able to inspect the full packet
content. Specify 0 for a full packet capture (recommended for SMB, MAPI, and SSL captures).
The default value is 1518 bytes.
Number of Files to Rotate Specify how many capture files to keep for each interface before overwriting the oldest file. To
stop file rotation, you can specify 0; however, NetApp recommends rotating files, because
stopping the rotation can fill the disk partition.
This limits the number of files created to the specified number, and begins overwriting files from
the beginning, thus creating a rotating buffer.
The default value is five files per interface. The maximum value is a 32-bit integer.
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