QoS module
The Quality of Service module processes and displays traffic with QoS tags for IP DSCP on layer 3 and VLAN PCP and MPLS TC on layer 2. For every tag the corresponding network traffic is accounted and a list of IP addresses for which the QoS tag has been seen is available
Layer 2 QoS
For layer 2 VLAN priority code points and MPLS traffic classes are analysed and displayed in a table with traffic counters, a history graph of traffic over time and a PCAP button that certain QoS tag.
VLAN priority code point
VLAN priority code point (PCP) values are displayed as defined by IEEE 802.1Q-2005.
PCP | Priority | Short name | Description |
---|---|---|---|
1 | 0 (lowest) | BK | Background |
0 | 1 (default) | BE | Best effort |
2 | 2 | EE | Excellent effort |
3 | 3 | CA | Critical applications |
4 | 4 | VI | Video, < 100 ms latency and jitter |
5 | 5 | VO | Voice, < 10 ms latency and jitter |
6 | 6 | IC | Internetwork control |
7 | 7 (highest) | NC | Network control |
MPLS traffic class
MPLS traffic class (TC) values are displayed as a number only. The TC value is intended to be flexible according to RFC5462. The old name of that field was EXP (experimental).
Layer 3 QoS
For layer 3 IP differentiated services codepoint (DSCP) are displayed in a table with traffic counters, a history graph of traffic over time and a PCAP button for that certain DSCP value. DSCP values are displayed as defined by RFC4594.
Service class name | DSCP name | DSCP value |
---|---|---|
Network Control | CS6 | 48 |
Telephony | EF | 46 |
Voice Admit | VOICE-ADMIT | 44 |
Signaling | CS5 | 40 |
Multimedia Conferencing | AF41, AF42, AF43 | 34, 36, 38 |
Real-Time Interactive | CS4 | 32 |
Multimedia Streaming | AF31, AF32, AF33 | 26, 28, 30 |
Broadcast Video | CS3 | 24 |
Low-Latency Data | AF21, AF22, AF23 | 18, 20, 22 |
OAM | CS2 | 16 |
High-Throughput Data | AF11, AF12, AF13 | 10, 12, 14 |
Standard | DF (CS0) | 0 |
Low-Priority Data | CS1 | 8 |
Additionally legacy Type of Service values as defined by RFC791 and RFC1349 are displayed if DSCP is not used. Consider following DSCP and Type of Service compatibility map.
ToS value | ToS Precedence | ToS Delay flag | ToS Throughput flag | ToS Reliability flag | DSCP value | DSCP name |
---|---|---|---|---|---|---|
0 | Routine | 0 | 0 | 0 | 0 | Standard |
4 | Routine | 0 | 0 | 1 | 1 | Standard |
8 | Routine | 0 | 1 | 0 | 2 | Standard |
12 | Routine | 0 | 1 | 1 | 3 | Standard |
16 | Routine | 1 | 0 | 0 | 4 | Standard |
32 | Priority | 0 | 0 | 0 | 8 | CS1 |
40 | Priority | 0 | 1 | 0 | 10 | AF11 |
48 | Priority | 1 | 0 | 0 | 12 | AF12 |
56 | Priority | 1 | 1 | 0 | 14 | AF13 |
64 | Immediate | 0 | 0 | 0 | 16 | CS2 |
72 | Immediate | 0 | 1 | 0 | 18 | AF21 |
80 | Immediate | 1 | 0 | 0 | 20 | AF22 |
88 | Immediate | 1 | 1 | 0 | 22 | AF23 |
96 | Flash | 0 | 0 | 0 | 24 | CS3 |
104 | Flash | 0 | 1 | 0 | 26 | AF31 |
112 | Flash | 1 | 0 | 0 | 28 | AF32 |
120 | Flash | 1 | 1 | 0 | 30 | AF33 |
128 | Flash Override | 0 | 0 | 0 | 32 | CS4 |
136 | Flash Override | 0 | 1 | 0 | 34 | AF41 |
144 | Flash Override | 1 | 0 | 0 | 36 | AF42 |
152 | Flash Override | 1 | 1 | 0 | 38 | AF43 |
160 | Critical | 0 | 0 | 0 | 40 | CS5 |
176 | Critical | 1 | 0 | 0 | 44 | Voice Admit |
184 | Critical | 1 | 1 | 0 | 46 | EF |
192 | Internetwork Control | 0 | 0 | 0 | 48 | CS6 |
224 | Network Control | 0 | 0 | 0 | 56 | CS7 |
QoS details
By clicking on a QoS tag a details page with all seen IPs for that certain QoS tag is displayed. The traffic of the certain IP for that certain QoS tag is shown.