6.8.3 Ethernet — PCAP
The VB220 can make PCAP recordings on the data interface of up to approximately 1 Gbyte (depending
on the amount of free disk) based on simple user configurable filters. The PCAP format supports
microsecond timing accuracy.
Incoming traffic is recorded if it matches one or more of the enabled filters while outgoing traffic is always
recorded. So for instance, to record all OTT traffic on the data interface it is sufficient to enable the
“Capture all TCP traffic” filter (since OTT uses the HTTP protocol which is always TCP).
Flags and filters
Capture only header:
If enabled, only 64 first bytes of Ethernet frame is captured. This allows
higher bitrate traffic to be recorded and over longer time.
Capture all
non TCP/UDP traffic:
Check to record non-IPv4 traffic such as ARP, PIM or IPv6.
Capture all TCP traffic: Check to capture all IPv4 TCP traffic.
Capture all UDP traffic: Check to capture all IPv4 UDP traffic.
IP DST and IP SRC
filters:
Check to activate test. Will capture stream if IP destination address
matches. If SRC is specified it has to match too.
Recording
Size: Size of current recording.
Dropped packets:
Number of dropped packets due, usually caused by running temporarily out
of buffer due to too high traffic. To allow higher bitrate recordings
Capture
only headers may be enabled.
Buffer use %:
Current buffer utilization. At 100% the
Dropped packets
will start counting.
124 VB2xx GigE User’s Manual version 5.4
To Next Page
Loading...
Need help?
General
