Chapter 25 Two Rate Three Color Marker
MGS-3712/MGS-3012F User’s Guide
211
• Green (low loss priority level) packets are forwarded.
trTCM operates in one of two modes: color-blind or color-aware. In color-blind mode, packets
are marked based on evaluating against the PIR and CIR regardless of if they have previously
been marked or not. In the color-aware mode, packets are marked based on both existing color
and evaluation against the PIR and CIR. If the packets do not match any of colors, then the
packets proceed unchanged.
25.2.1 trTCM - Color-blind Mode
All packets are evaluated against the PIR. If a packet exceeds the PIR it is marked red.
Otherwise it is evaluated against the CIR. If it exceeds the CIR then it is marked yellow.
Finally, if it is below the CIR then it is marked green.
Figure 123
trTCM - Color-blind Mode
25.2.2 trTCM - Color-aware Mode
In color-aware mode the evaluation of the packets uses the existing packet loss priority.
trTCM can increase a packet loss priority of a packet but it cannot decrease it. Packets that
have been previously marked red or yellow can only be marked with an equal or higher packet
loss priority.
Packets marked red (high packet loss priority) continue to be red without evaluation against
the PIR or CIR. Packets marked yellow can only be marked red or remain yellow so they are
only evaluated against the PIR. Only the packets marked green are first evaluated against the
PIR and then if they don’t exceed the PIR level are they evaluated against the CIR.
Figure 124
trTCM - Color-aware Mode
Exceed
PIR?
High Packet
Loss
Exceed
CIR?
Medium Packet
Loss
NO
YES
NO
YES
Low Packet
Loss
Exceed
PIR?
High Packet
Loss
Exceed
CIR?
Medium Packet
Loss
NO
YES
NO
YES
Low Packet
Loss
High Packet
Loss
NO
YES
Red?
Yellow?
Medium Packet
Loss
NO
YES
Summary of Contents for MGS-3712
Page 2: ......
Page 7: ...Safety Warnings MGS 3712 MGS 3012F User s Guide 7 ...
Page 8: ...Safety Warnings MGS 3712 MGS 3012F User s Guide 8 ...
Page 20: ...Table of Contents MGS 3712 MGS 3012F User s Guide 20 ...
Page 28: ...List of Tables MGS 3712 MGS 3012F User s Guide 28 ...
Page 30: ...30 ...
Page 38: ...Chapter 2 Hardware Installation and Connection MGS 3712 MGS 3012F User s Guide 38 ...
Page 50: ...50 ...
Page 70: ...Chapter 6 System Status and Port Statistics MGS 3712 MGS 3012F User s Guide 70 ...
Page 82: ...Chapter 7 Basic Setting MGS 3712 MGS 3012F User s Guide 82 ...
Page 84: ...84 ...
Page 132: ...Chapter 15 Link Aggregation MGS 3712 MGS 3012F User s Guide 132 ...
Page 142: ...Chapter 17 Port Security MGS 3712 MGS 3012F User s Guide 142 ...
Page 148: ...Chapter 18 Classifier MGS 3712 MGS 3012F User s Guide 148 Figure 80 Classifier Example ...
Page 153: ...Chapter 19 Policy Rule MGS 3712 MGS 3012F User s Guide 153 Figure 83 Policy Example ...
Page 154: ...Chapter 19 Policy Rule MGS 3712 MGS 3012F User s Guide 154 ...
Page 170: ...Chapter 21 Multicast MGS 3712 MGS 3012F User s Guide 170 ...
Page 184: ...Chapter 22 Authentication Accounting MGS 3712 MGS 3012F User s Guide 184 ...
Page 214: ...Chapter 25 Two Rate Three Color Marker MGS 3712 MGS 3012F User s Guide 214 ...
Page 215: ...215 PART IV IP Application Static Route 217 DHCP 221 ...
Page 216: ...216 ...
Page 220: ...Chapter 26 Static Route MGS 3712 MGS 3012F User s Guide 220 ...
Page 228: ...Chapter 27 DHCP MGS 3712 MGS 3012F User s Guide 228 ...
Page 230: ...230 ...
Page 256: ...Chapter 30 Diagnostic MGS 3712 MGS 3012F User s Guide 256 ...
Page 260: ...Chapter 31 Syslog MGS 3712 MGS 3012F User s Guide 260 ...
Page 274: ...274 ...
Page 278: ...Chapter 36 Troubleshooting MGS 3712 MGS 3012F User s Guide 278 ...
Page 286: ...286 ...
Page 290: ...Appendix A Common Services MGS 3712 MGS 3012F User s Guide 290 ...
Page 294: ...Appendix B Legal Information MGS 3712 MGS 3012F User s Guide 294 ...