Guys, I know I'm not the sharpest tool in the crayon box but capture filters are really hanging me up from some constructive monitoring. I have a port mirror setup on a Procurve uplink port going into yonder Wireshark computer. Things seem to work fine up until I try to use capture filters.
Here are a few examples:
Capture filter: vlan 70 or vlan 90
Expected behavior: Show only frames with VLAN ID matching either 70 or 90
Actual behavior: Only VLAN 70 frames are captured
Sanity check: Not using a capture filter and then using a display filter shows both
Capture filter: icmp
Expected behavior: Show pings, replies, and other ICMP traffic
Actual behavior: Ping requests are shown but replies are not
Sanity check: Not using a capture shows both requests and replies
Capture filter: not ip
Expected behavior: Give me only ARP, STP, and other L2 stuff
Actual behavior: TCP and UDP as far as the eye can see
Sanity check: Am insane
Hope someone can elucidate some of the troubles I'm having with getting some desired captures.