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Hello ITgustl

and welcome to ask.wireshark.org.

To visualize the broadcast load per VLAN I highly recommend the I/O graphs. The feature is available though the menu Statistics -> I/O Graphs.

• You probably want to disable the default graphs by removing the checkmarks in the first column.
• Next, add a filter for each VLAN in your trace, like vlan.id == 1 and eth.dst.ig == 1
• Depending on your needs, selects packets per second or bit per second
• Fiddle around with the style settings per line / graph name

A few hints for the graphs:

• Use strong, distinct colors. Red, blue and green work great on screen
• Check if the lines are visible on a monochrome print-out
• Fiddle around with the graph style. I like a line pattern for the most frequent values and impulse or bars for less frequent numbers.

Good luck

Eddi