This section provides details on how IP Precedence and DSCP values affect quality of service for SNMP traffic on routers, including configuration options and technical definitions.
SNMP IP Precedence and differentiated services code point (DSCP) support deliver QoS specifically for SNMP traffic:
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You can set SNMP traffic generated by a router to use a specific QoS class, controlling its priority for network handling.
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The configured IP Precedence or DSCP value determines packet treatment in weighted random early detection (WRED).
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A router cannot assign different QoS classes to different SNMP traffic types—all SNMP traffic from the device shares the same configuration.
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Technical details:
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IP Precedence: Refers to the first three bits of the type of service (ToS) byte in an IP header.
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DSCP (Differentiated Services Code Point): Refers to the first six bits of the Differentiated Services (DiffServ) field byte.
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Up to eight different IP Precedence values and 64 DSCP markings can be configured.
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