Max bitrate:
The maximum current bitrate measurement
IP packets:
The number of IP packets received
Dst address:
Multicast/unicast destination address : port
TOS:
Type-Of-Service (also called Differentiated Services Field)
TTL:
Time-To-Live
VLAN ID:
Native VLAN ID of this stream
Src address:
Multicast/unicast source address : port
Joined src:
The source address of the originally joined multicast.
IAT avg:
Average Inter-Arrival Time. The average time between consecutive IP frames (in
milliseconds). Recalculated each second.
IAT min:
The Minimum Inter-Arrival Time is the minimum registered time between two con-
secutive IP frames carrying video. Units are in milliseconds.
IAT max:
The Maximum Inter-Arrival Time is the maximum registered time between two
consecutive IP frames carrying video. Units are in milliseconds. The Max-IAT is
a measure of the maximum amount of network-induced packet jitter present. IP
packet jitter affects video quality and should be minimized.
Src MAC:
Source MAC address
Dst MAC:
Destination MAC address
RTP drops:
Accumulated number of dropped IP-frames due to network errors. Only available for
multicasts that carry RTP information. When running video inside an RTP wrapper
it is possible to exactly deduce the number of dropped IP frames due to network
issues. This is possible as a result of the 16-bit sequence counter inside the RTP
header. The following sequence will generate an RTP drops of +3: . . . , 10, 11, 12,
16, 17, 18, . . .
RTP dups:
Accumulated number of duplicate IP-frames. Only available for multicasts that
carry RTP information. Duplicate IP-frames in the network can occur under normal
circumstances and does not necessarily indicate network problems. The following
sequence will generate an RTP dups of +2: . . . , 10, 11, 12, 12, 12, 13, 14, . . .
RTP ooo:
Accumulated number of times a packet has been found to be out of order. Only
available for multicasts that carry RTP information. An out-of-order situation is
defined to have occurred when the current sequence number is lower than the
previous one. The following sequence will generate an RTP ooo of +2 (since there
are two occurrences): . . . , 10, 11, 15, 12, 16, 17, 13, 14, 18, 19, . . .
RTP lag:
The maximum number of packet positions an out-of-order packet has been moved
relative to its correct position. So for example 1,2,3,5,6,7,8,4,9,10 will result in an
RTP lag of 4. The RTP lag is a good measure of how big a packet re-ordering buffer
is needed in the receiving equipment to re-order packets.
Min hole size:
Minimum number of consecutive dropped RTP packets.
The sequence
1,2,3,10,11,12,15 gives a min hole size of 2.
VB3xx 10G Probe User’s Manual version 5.3
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Summary of Contents for VB330
Page 1: ...VB3xx 10G Probes Applies to software release v5 3 Form 8046E February 2017...
Page 7: ...F Appendix Restoring probe factory defaults 203 VB3xx 10G Probe User s Manual version 5 3 7...
Page 29: ...VB3xx 10G Probe User s Manual version 5 3 29...
Page 30: ...6 THE 10G PROBE GRAPHICAL USER INTERFACE 30 VB3xx 10G Probe User s Manual version 5 3...
Page 101: ...VB3xx 10G Probe User s Manual version 5 3 101...
