Traffic Policy; Figure 7-5 Structure Of Cos - Raisecom ISCOM2600G-HI (A) Series Configuration Manual

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ISCOM2600G-HI (A) Series Configuration Guide
The first 3 bits of the TCI field represent CoS, which ranges from 0 to 7, as shown in Figure
7-5. CoS is used to guarantee QoS on the Layer 2 network.

Figure 7-5 Structure of CoS

7.1.4 Traffic policy

After performing traffic classification on packets, you need to perform different operations on
packets of different categories. A traffic policy is formed when traffic classifiers are bound to
traffic behaviours.
Rate limiting based on traffic policy
Rate limiting refers to controlling network traffic, monitoring the rate of traffic entering the
network, and discarding overflow part, so it controls ingress traffic in a reasonable range, thus
protecting network resources and carrier interests.
The ISCOM2600G-HI series switch supports rate limiting based on traffic policy in the
ingress direction on the interface.
The ISCOM2600G-HI series switch supports using token bucket for rate limiting, including
single-token bucket and dual-token bucket.
Redirection
Redirection refers to redirecting packets to a specified interface, instead of forwarding packets
according to the mapping between the original destination address and interface, thus
implementing policy routing.
The ISCOM2600G-HI series switch supports redirecting packets to the specified interface for
forwarding in the ingress direction of the interface.
Remarking
Remarking refers to configuring some priority fields in packets again and then classifying
packets by user-defined standards. Besides, downstream nodes on the network can provide
differentiated QoS service according to remarking information.
The ISCOM2600G-HI series switch supports remarking packets by the following priority
fields:



Traffic statistics
Traffic statistics is used to gather statistics about data packets of a specified service flow; in
other words, the number of packets and bytes matching traffic class that pass the network or
are discarded.
IP precedence
DSCP
CoS
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