Capture Settings

The Capture app settings allow you to designate file and slice sizes, and apply filters to capture and analyze only certain packet types. For example, you can set a filter to capture only packets related to a specific application (based on IP address and port number).

When you open Capture from Home and do not configure any filters, all packets from the switch are captured. The default capture saves all the packets sent from the local switch to the LR 10G.

If you open the Capture app from another NetAlly test app, Capture filters are automatically applied. Filters that can be applied from other apps include Wired IP and MAC.

The Capture settings are saved until you clear the filters or open the app with new filters applied.

Tap the settings icon in the Capture screen to configure capture settings.

File Size Limit: Tap this field to specify a size for the capture file. The default size is 1 MB, and largest size allowed is 1000 MB. The capture stops when the captured file reaches this size. When capture is running, the capture screen displays the current file size as data is captured.

Slice Size: Tap this field to select a specific frame slice size or enter a custom value. The Slice Size setting limits how much of each packet is captured. A smaller slice size is useful when you are interested in the packet’s header but do not need to see all the payload data. The default is Full Packet.

Wired Filters

All filters are disabled by default unless you open Capture from another app. Tap the fields below to enable the filter and enter filter values.

MAC: Enter the MAC address of a host to capture only packets that contain the host's MAC address as the source or destination.

IP: Enter the IPv4 or IPv6 address of a host to capture only traffic to and from the host.

VLAN: Enter a VLAN number to capture only traffic tagged for that VLAN.

Protocol: Specify a Protocol filter, TCP or UDP, or leave the default of Disabled to capture both protocols.

Port: Specify a port number to capture only traffic from that UDP or TCP port. Select port 80 to capture HTTP traffic only.

NOT: Sets up a logical NOT to use with capture values you have set up with other filters. For example, if you set up a filter to capture traffic to and from IP 10.250.0.70 on Port 80, and then you enable NOT, the LinkRunner 10G captures all traffic except traffic to and from 10.250.0.70 on port 80.