HP-VLAN-CAR-MIB

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Category: Quality of Service, Technology: QoS, Technology: Switching/L2, Technology: VLAN, Vendor: HP/HPE

Description: HP SNMP MIB for VLAN-based Committed Access Rate (CAR) traffic policing applying bandwidth limits per VLAN on HP devices.

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What Is HP-VLAN-CAR-MIB?

HP-VLAN-CAR-MIB (its internal "sn" object prefix suggesting Foundry/Brocade-derived heritage rebranded under HP) is an HP networking MIB for configuring VLAN-based Committed Access Rate (CAR) traffic policing, applying bandwidth rate limits scoped to a specific VLAN on a switch/router. It exposes a table of per-VLAN CAR entries specifying direction (inbound/outbound), rate limits, burst limits, and the conform/exceed action taken on traffic. This is a configuration-oriented policing MIB rather than a hardware-health MIB; its runtime relevance for monitoring is confirming the enforced rate/limit values and conform action are being applied as configured to a VLAN's traffic. It builds on standard CAR/rate-limiting concepts also seen in other vendors' CAR MIBs and depends on the device's VLAN identification scheme for snVLanCARVLanId. Typical deployment is on HP (Foundry/Brocade-lineage) switches and routers in enterprise networks needing per-VLAN bandwidth control, where HP-VLAN-CAR-MIB SNMP monitoring confirms rate limits are enforced as configured.

IPNetwork Monitor allows you to monitor SNMP objects defined in HP-VLAN-CAR-MIB. Use the built-in SNMP Monitoring Browser to explore available variables, view their current values and descriptions, and select the objects you want to monitor. You can then create SNMP monitors, configure thresholds, and receive alerts when monitored values change.

Supported Devices

HP (Foundry/Brocade-lineage) switches and routers

Monitoring Examples

An administrator would inspect the snVLanCARTable (snVLanCAREntry) for a given snVLanCARVLanId and snVLanCARDirection to confirm the configured snVLanCARRate and snVLanCARLimit (and snVLanCARExtLimit for burst allowance) match policy intent. The snVLanCARConformAction object shows what happens to traffic exceeding the rate (e.g. drop or remark), and snVLanCARType/snVLanCARAccIdx identify the CAR classification and access-list index tying the rate limit to specific traffic. Unexpectedly high volumes being passed despite a low snVLanCARRate would suggest the CAR entry is misapplied or the conform action isn't dropping excess traffic as expected.

What Can Be Monitored

per-VLAN CAR rate limit
per-VLAN CAR burst limit
traffic direction policed
conform/exceed action
CAR classification type

Imported Objects

From HP-CAR-MIB

PacketSource
RateLimitAction
RateLimitType

From HP-SN-SWITCH-GROUP-MIB

snVLanCAR

OBJECT-IDENTITY

From RFC1155-SMI

Gauge
OBJECT-TYPE

From SNMPv2-SMI

Counter64

OIDs

OID symbolic	OID numeric	Type	Access	Description
snVLanCARs	1.3.6.1.4.1.11.2.3.7.11.12.1.3.17.1
snVLanCARTable	1.3.6.1.4.1.11.2.3.7.11.12.1.3.17.1.1		not-accessible	A table of rate limit configuration entries for a vlan. Rate Limit is a method of traffic control. It allows a set of rate limits to be configured and applied to packets flowing into/out of an interface to regulate network traffic.
snVLanCAREntry	1.3.6.1.4.1.11.2.3.7.11.12.1.3.17.1.1.1		not-accessible	A collection of rate-limit configuration objects on this vlan.
INT snVLanCARVLanId	1.3.6.1.4.1.11.2.3.7.11.12.1.3.17.1.1.1.1	INTEGER	read-only	The VLAN ID as one of the indices of this table . Each VLAN ID can have a membership of multiple ports.
PAC snVLanCARDirection	1.3.6.1.4.1.11.2.3.7.11.12.1.3.17.1.1.1.2	PacketSource	read-only	The input or output transmission direction for the Rate Limit object.
INT snVLanCARRowIndex	1.3.6.1.4.1.11.2.3.7.11.12.1.3.17.1.1.1.3	INTEGER	read-only	The table index for rate limit objects. It increases as the rate limit entries are added. Skips the number when a row is deleted.
RAT snVLanCARType	1.3.6.1.4.1.11.2.3.7.11.12.1.3.17.1.1.1.4	RateLimitType	read-only	The type of traffic rate-limited against.
INT snVLanCARAccIdx	1.3.6.1.4.1.11.2.3.7.11.12.1.3.17.1.1.1.5	INTEGER	read-only	The index to the access list if RateLimitType is either quickAcc or standardAcc.
INT snVLanCARRate	1.3.6.1.4.1.11.2.3.7.11.12.1.3.17.1.1.1.6	INTEGER	read-only	The comitted access rate. This determines the long term average transmission rate. Traffic that falls under this rate always conforms. This is average rate in bits per second.
INT snVLanCARLimit	1.3.6.1.4.1.11.2.3.7.11.12.1.3.17.1.1.1.7	INTEGER	read-only	This is the normal burst size that determines how large traffic bursts can be before some traffic exceeds the rate limit. This specifies the number of bytes that are guaranteed to be transported by the network at the average rate under normal conditions during committed time interval. This normal burst size is in bytes.
INT snVLanCARExtLimit	1.3.6.1.4.1.11.2.3.7.11.12.1.3.17.1.1.1.8	INTEGER	read-only	This is the extended burst limit that determines how large traffic bursts can be before all the traffic exceeds the rate limit. This burst size is in bytes.
RAT snVLanCARConformAction	1.3.6.1.4.1.11.2.3.7.11.12.1.3.17.1.1.1.9	RateLimitAction	read-only	Action to be taken when the traffic is within the Rate Limit. drop drop the packet. xmit transmit the packet. continue continue to evaluate to the subsequent rate limits. precedXmit rewrite the IP precedence and transmit the packet. precedCont rewrite the IP precedence and allow it evaluated by subsequent rate limits.
RAT snVLanCARExceedAction	1.3.6.1.4.1.11.2.3.7.11.12.1.3.17.1.1.1.10	RateLimitAction	read-only	Action to be taken when the traffic exceeds the Rate Limit. drop drop the packet. xmit transmit the packet. continue continue to evaluate to the subsequent rate limits. precedXmit rewrite the IP precedence and transmit the packet. precedCont rewrite the IP precedence and allow it evaluated by subsequent rate limits.
C64 snVLanCARStatSwitchedPkts	1.3.6.1.4.1.11.2.3.7.11.12.1.3.17.1.1.1.11	Counter64	read-only	The counter of packets permitted by this rate limit.
C64 snVLanCARStatSwitchedBytes	1.3.6.1.4.1.11.2.3.7.11.12.1.3.17.1.1.1.12	Counter64	read-only	The counter of bytes permitted by this interface.
C64 snVLanCARStatFilteredPkts	1.3.6.1.4.1.11.2.3.7.11.12.1.3.17.1.1.1.13	Counter64	read-only	The counter of packets which exceeded this rate limit.
C64 snVLanCARStatFilteredBytes	1.3.6.1.4.1.11.2.3.7.11.12.1.3.17.1.1.1.14	Counter64	read-only	The counter of bytes which exceeded this rate limit.
GAU snVLanCARStatCurBurst	1.3.6.1.4.1.11.2.3.7.11.12.1.3.17.1.1.1.15	Gauge	read-only	The current received burst size.

RFC description

HP vendor-private MIB for VLAN committed access rate (CAR) traffic control and rate limiting on VLAN interfaces.

Start monitoring HP (Foundry/Brocade-lineage) switch/router (per-VLAN Committed Access Rate policing) with a free 30-day trial of IPNetwork Monitor. Import MIBs, browse SNMP OIDs, create custom SNMP monitors, configure alerts, and monitor any SNMP-enabled network device from a single console.

Download HP-VLAN-CAR-MIB

What Is HP-VLAN-CAR-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description