H3C-STORM-CONSTRAIN-MIB

All MIBs › H3C-STORM-CONSTRAIN-MIB

Organization: Huawei 3Com Technologies Co., Ltd.

Last Updated: 2008-06-06

Category: Technology: Switching/L2, Vendor: H3C/HH3C

Description: H3C MIB for traffic storm control configuration limiting broadcast, multicast, and unknown unicast flooding rates.

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What Is H3C-STORM-CONSTRAIN-MIB?

H3C-STORM-CONSTRAIN-MIB manages H3C's Storm-Constrain feature, which protects switch ports from broadcast, multicast, and unknown-unicast traffic storms by monitoring traffic rates and automatically blocking a port's forwarding when a configured upper threshold is exceeded, restoring it once traffic falls below a lower threshold. It exposes per-port configuration for each traffic type's measurement unit and upper/lower thresholds, the port's current controlled/normal status, and trap configuration for threshold-exceeded events. This MIB is fundamentally about detecting and responding to abnormal traffic conditions at the port level — administrators use it to see which ports have been automatically shut down (controlled-status) due to a storm, and to tune thresholds so legitimate bursty traffic isn't mistaken for an attack or loop-induced storm. It operates on top of the standard interface/bridge port model (IF-MIB-style ifIndex) since storm control is applied per physical port. It is deployed on H3C access and aggregation switches to protect against broadcast storms typically caused by Layer 2 loops or malicious flooding. Engineers can download the H3C-STORM-CONSTRAIN-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in H3C-STORM-CONSTRAIN-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

H3C access and aggregation switches

Monitoring Examples

An administrator would walk h3cStormCtrlTable (h3cStormCtrlEntry) to check h3cStormCtrlPortStatus on each port, quickly identifying any port that has entered a controlled (blocked) state due to a storm. Threshold objects like h3cStormCtrlBroadcastUpper, h3cStormCtrlBroadcastLower, and h3cStormCtrlBroadcastUnit (similarly for multicast and unicast) would be reviewed to confirm the configured limits are appropriate for the port's expected traffic profile. h3cStormTrapType and h3cStormTrapThreshold configure which storm events generate notifications via h3cStormNotifications, letting an operator be paged immediately when a port is auto-disabled due to a Layer 2 loop or flood.

What Can Be Monitored

per-port storm control status (controlled/normal)
broadcast/multicast/unicast rate thresholds
storm trap configuration
port auto-block due to traffic storm

Imported Objects

From HUAWEI-3COM-OID-MIB

h3cCommon

OBJECT-IDENTITY

From RFC1213-MIB

ifIndex

From SNMPv2-SMI

Integer32
MODULE-IDENTITY
NOTIFICATION-TYPE
OBJECT-IDENTITY
OBJECT-TYPE

From SNMPv2-TC

RowStatus
TEXTUAL-CONVENTION

OIDs

OID symbolic	OID numeric	Type	Access	Description
h3cStormConstrain	1.3.6.1.4.1.2011.10.2.66			The Storm-Constrain function is used to avoid the packet-storm on a port. Three types of flux can be set observed respectively: broadcast, multicast and unicast. If an observed flux exceeds its upper limit, this kind of flux will be recognized as over-upper-flux. This kind of flux will be considered as normal-flux until it falls below its lower limit. If any type of observed flux is over-upper-flux, the port will change its status to controlled-status, that is to stop packet forwarding to avoid storm. Only when all the observed fluxes are not over-upper-flux, will the port return to normal(forwarding) status.
h3cStormScalarGroup	1.3.6.1.4.1.2011.10.2.66.1
INT h3cStormTrapType	1.3.6.1.4.1.2011.10.2.66.1.1	INTEGER	accessible-for-notify	This value is used to identify the type of trap. broadcast: trap message is generated for broadcast flux exceeds upper limit or falls under lower limit on a port. multicast: trap message is generated for multicast flux exceeds upper limit or falls under lower limit on a port. unicast : trap message is generated for unicast flux exceeds upper limit or falls under lower limit on a port.
I32 h3cStormTrapThreshold	1.3.6.1.4.1.2011.10.2.66.1.2	Integer32	accessible-for-notify	This value is used to figure the threshold of flux in trap message. For example, when the trap is generated for broadcast flux exceeds upper limit on a port, this value is equal to upper limit value configured. And when the trap is generated for broadcast flux fell under lower limit, this value is equal to lower limit value configured.
h3cStormTableGroup	1.3.6.1.4.1.2011.10.2.66.2
h3cStormCtrlTable	1.3.6.1.4.1.2011.10.2.66.2.1		not-accessible	A table containing configurations of storm-constrain.
h3cStormCtrlEntry	1.3.6.1.4.1.2011.10.2.66.2.1.1		not-accessible	Detailed information of storm-constrain configurations.
INT h3cStormCtrlPortStatus	1.3.6.1.4.1.2011.10.2.66.2.1.1.1	INTEGER	read-only	Status of the port: controlled: indicate that the port is in controlled status. Port which is in this status will not forward some type of packet. normal : indicate that the port is in normal status.
H3C h3cStormCtrlBroadcastUnit	1.3.6.1.4.1.2011.10.2.66.2.1.1.2	H3cStormConstrainUnit	read-create	The unit of the broadcast flux. This value must be set together with h3cStormCtrlBroadcastUpper and h3cStormCtrlBroadcastLower.
I32 h3cStormCtrlBroadcastUpper	1.3.6.1.4.1.2011.10.2.66.2.1.1.3	Integer32	read-create	The upper-limit of incoming broadcast taffic at a port within 1 second interval. Its unit depends on h3cStormCtrlBroadcastUnit value.
I32 h3cStormCtrlBroadcastLower	1.3.6.1.4.1.2011.10.2.66.2.1.1.4	Integer32	read-create	The lower-limit of incoming broadcast taffic at a port within 1 second interval. This value must be lower than h3cStormCtrlBroadcastUpper value. Its unit depends on h3cStormCtrlBroadcastUnit value.
H3C h3cStormCtrlMulticastUnit	1.3.6.1.4.1.2011.10.2.66.2.1.1.5	H3cStormConstrainUnit	read-create	The unit of the multicast flux. This value must be set together with h3cStormCtrlMulticastUpper and h3cStormCtrlMulticastLower.
I32 h3cStormCtrlMulticastUpper	1.3.6.1.4.1.2011.10.2.66.2.1.1.6	Integer32	read-create	The upper-limit of incoming multicast taffic at a port within 1 second interval. Its unit depends on h3cStormCtrlMulticastUnit value.
I32 h3cStormCtrlMulticastLower	1.3.6.1.4.1.2011.10.2.66.2.1.1.7	Integer32	read-create	The lower-limit of incoming multicast taffic at a port within 1 second interval. This value must be lower than h3cStormCtrlMulticastUpper value. Its unit depends on h3cStormCtrlMulticastUnit value.
H3C h3cStormCtrlUnicastUnit	1.3.6.1.4.1.2011.10.2.66.2.1.1.8	H3cStormConstrainUnit	read-create	The unit of the unicast flux. This value must be set together with h3cStormCtrlUnicastUpper and h3cStormCtrlUnicastLower.
I32 h3cStormCtrlUnicastUpper	1.3.6.1.4.1.2011.10.2.66.2.1.1.9	Integer32	read-create	The upper-limit of incoming unicast taffic at a port within 1 second interval. Its unit depends on h3cStormCtrlUnicastUnit value.
I32 h3cStormCtrlUnicastLower	1.3.6.1.4.1.2011.10.2.66.2.1.1.10	Integer32	read-create	The lower-limit of incoming unicast taffic at a port within 1 second interval. This value must be lower than h3cStormCtrlUnicastUpper value. Its unit depends on h3cStormCtrlUnicastUnit value.
ROW h3cStormCtrlRowStatus	1.3.6.1.4.1.2011.10.2.66.2.1.1.11	RowStatus	read-create	This object is responsible for managing the creation, deletion and modification of rows, which supports active status and CreatAndGo, destroy operation.
INT h3cStormCtrlPortMode	1.3.6.1.4.1.2011.10.2.66.2.1.1.12	INTEGER	read-create	The storm control mode of the port.
h3cStormNotifications	1.3.6.1.4.1.2011.10.2.66.3
NTF h3cStormRising	1.3.6.1.4.1.2011.10.2.66.3.1			This trap message is generated when any type of the flux exceeds its upper limit on a port.
NTF h3cStormFalling	1.3.6.1.4.1.2011.10.2.66.3.2			This trap message is generated when a flux which used to overflow its upper limit, falls below its lower limit on a port.

RFC description

Manages broadcast and multicast storm control on Huawei 3Com switches to prevent packet storms on network ports.

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Download H3C-STORM-CONSTRAIN-MIB

What Is H3C-STORM-CONSTRAIN-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description