All MIBs › DOCS-IETF-QOS-MIB › docsIetfQosPktClassIpTosMask
docsIetfQosPktClassIpTosMask
Module: DOCS-IETF-QOS-MIB
OID (symbolic): DOCS-IETF-QOS-MIB::docsIetfQosPktClassIpTosMask
OID (numeric): 1.3.6.1.2.1.127.1.1.1.6
Node type: OBJECT-TYPE
Type: OCTET STRING
Access: read-only
Description: The mask value is bitwise ANDed with TOS byte in an IP packet, and this value is used for range checking of TosLow and TosHigh.
If the referenced parameter is not present in a classifier, this object reports the value of 0.
The IP TOS octet as originally defined in RFC 791 has been superseded by the 6-bit Differentiated Services Field (DSField, RFC 3260) and the 2-bit Explicit Congestion Notification Field (ECN field, RFC 3168). This object is defined as an 8-bit octet per the DOCSIS Specification for packet classification.
What is docsIetfQosPktClassIpTosMask?
The bitmask ANDed with a packet's TOS byte before the result is checked against the TosLow/TosHigh range, reported as 0 if not configured. This lets an admin ignore irrelevant TOS bits (like the ECN bits) when matching on DSCP markings.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.2.1.127.1.1.1.6 snmpwalk -v2c -c public <target> DOCS-IETF-QOS-MIB::docsIetfQosPktClassIpTosMask
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.2.1.127.1.1.1.6.1 snmpget -v2c -c public <target> DOCS-IETF-QOS-MIB::docsIetfQosPktClassIpTosMask.1
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OID Breakdown
Upper-level ancestors (6 from the standard OID tree / other modules)
| Numeric OID | Name | Module |
|---|---|---|
| 1 | iso | LANART-AGENT |
| 1.3 | org | AirPair-MIB |
| 1.3.6 | dod | AirPair-MIB |
| 1.3.6.1 | internet | AirPair-MIB |
| 1.3.6.1.2 | mgmt | APERTUS-NPG-MIB |
| 1.3.6.1.2.1 | mib_2 | AXON-MIB |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.2.1.127 | docsIetfQosMIB | DOCS-IETF-QOS-MIB |
| 1.3.6.1.2.1.127.1 | docsIetfQosMIBObjects | DOCS-IETF-QOS-MIB |
| 1.3.6.1.2.1.127.1.1 | docsIetfQosPktClassTable | DOCS-IETF-QOS-MIB |
| 1.3.6.1.2.1.127.1.1.1 | docsIetfQosPktClassEntry | DOCS-IETF-QOS-MIB |
| 1.3.6.1.2.1.127.1.1.1.6 | docsIetfQosPktClassIpTosMask | DOCS-IETF-QOS-MIB |