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Chapter 40 Differentiated Services
XGS-4526/4528F/4728F User’s Guide
356
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 181 TRTCM - Color-aware Mode
40.3 Activating DiffServ
Activate DiffServ to apply marking rules or IEEE 802.1p priority mapping on the
selected port(s).
Click IP Application > DiffServ in the navigation panel to display the screen as
shown.
Figure 182 IP Application > DiffServ
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