A3COM-HUAWEI-EVC-MIB

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Organization: Hangzhou H3C Tech. Co., Ltd.

Last Updated: 2009-08-08

Category: VLAN and Bridging, Vendor: H3C/HH3C

Description: Manages Ethernet Virtual Circuit service instances, VLAN mapping, and encapsulation on H3C devices.

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What Is A3COM-HUAWEI-EVC-MIB?

A3COM-HUAWEI-EVC-MIB is a joint 3Com/Huawei (H3C) enterprise MIB in the carrier Ethernet service-provisioning technology area, managing Ethernet Virtual Connection (EVC) service instances on H3C switches and routers. It exposes per-port EVC service-instance tables covering instance ID, encapsulation type, S-VLAN ID range mapping, row status, and per-instance rate-limiting (CAR) enable flags for inbound/outbound statistics. It functions mainly as a service-configuration and operational-state monitoring MIB rather than a hardware-sensor MIB — h3cEvcSrvInstRowStatus reveals whether a given EVC service instance is active, which is directly useful for confirming that a customer's Ethernet service is provisioned and up. It complements general Ethernet/802.1 VLAN conventions and relies on IF-MIB for the underlying physical ports carrying the EVC instances. It is typically deployed on H3C (Huawei-3Com) carrier-Ethernet-capable switches and routers delivering Metro Ethernet or business Ethernet services. Engineers can download the A3COM-HUAWEI-EVC-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in A3COM-HUAWEI-EVC-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 (Huawei-3Com) carrier Ethernet switch/router

Monitoring Examples

An administrator would poll h3cEvcSrvInstTable (via h3cEvcSrvInstEntry/h3cEvcSrvInstId) to check h3cEvcSrvInstRowStatus and confirm a customer's EVC service instance remains active, while comparing h3cEvcSrvInstSvlanIdListLow/High against the provisioned S-VLAN range to catch a misconfiguration. Checking h3cEvcSrvInstCarTable would reveal whether rate-limiting is enabled as expected for that service instance.

What Can Be Monitored

EVC service instance status
S-VLAN ID range mapping
encapsulation type per service instance
per-instance rate limiting (CAR) configuration

Imported Objects

From A3COM-HUAWEI-OID-MIB

h3cCommon

OBJECT-IDENTITY

From IF-MIB

ifIndex

OBJECT-TYPE

From SNMPv2-SMI

Counter64
Integer32
MODULE-IDENTITY
OBJECT-TYPE

From SNMPv2-TC

RowStatus
TruthValue

How to Use in IPNetwork Monitor

Example using h3cEvcSrvInstInPackets OID:

Select an H3C carrier Ethernet switches/router as the target host to create a monitor — the SNMP service should be up and running on it. Click New Monitor, then check SNMP Custom on the Favorites tab, click Next, and confirm the host. On the next page, click Select... to open the built-in SNMP MIB Browser and type h3cEvcSrvInstInPackets into the Find box to locate it in the OID tree, selecting the specific row/instance you want to monitor since this is a table column, then select it and click OK. It reports the number of inbound packets received on this service instance. On the monitor's Main parameters page you can set the target's SNMP port (default 161), credentials, polling interval, and other settings — see the SNMP Monitor help for details. On the State conditions and Alerting tabs, configure when the monitor should change state and trigger an alert; since this is a Counter64-type OID, Value bounds is the most useful condition here — trigger an alert if the counter increases sharply between polls relative to its normal baseline (in packets), since an unexpected spike often reflects a real change in traffic or activity. Click Finish to create the monitor; you can adjust any parameter later.

OIDs

OID symbolic	OID numeric	Type	Access	Description
h3cEvc	1.3.6.1.4.1.43.45.1.10.2.106			Ethernet Virtual Connection MIB
h3cEvcObjects	1.3.6.1.4.1.43.45.1.10.2.106.1
h3cEvcScalarGroup	1.3.6.1.4.1.43.45.1.10.2.106.1.1
BIT h3cEvcSrvInstEncapCapabilities	1.3.6.1.4.1.43.45.1.10.2.106.1.1.1	Bits	read-only	This object displays the encapsulation capabilities of service instance with respect to certain fields. The following values may be supported: encapPortBased: Support for matching packets by port. encapUntagged: Support for matching untagged packets. encapTagged: Support for matching all tagged packets. encapSvlanId: Support for matching packets by a SVLAN ID, and the packets may be untagged if PVID of the port is the SVLAN ID when the encapSvlanIdOnlyTagged field is not set. encapSvlanIdList: Support for matching packets by SVLAN ID list, and the packets may be untagged if PVID of the port is in SVLAN ID list when the encapSvlanIdOnlyTagged field is not set. encapSvlanIdOnlyTagged: encapSvlanId or encapSvlanId field indicates to support for matching only tagged packets when this field is set.
I32 h3cEvcPortMaxSrvInstNum	1.3.6.1.4.1.43.45.1.10.2.106.1.1.2	Integer32	read-only	The max service instance number of a port.
h3cEvcSrvInstTable	1.3.6.1.4.1.43.45.1.10.2.106.1.2		not-accessible	A table for configuring service instance parameter of the port.
h3cEvcSrvInstEntry	1.3.6.1.4.1.43.45.1.10.2.106.1.2.1		not-accessible	An entry for configuring service instance parameter of the port.
I32 h3cEvcSrvInstId	1.3.6.1.4.1.43.45.1.10.2.106.1.2.1.1	Integer32	not-accessible	Service instance ID. Its value ranges from 1 to the value of h3cEvcPortMaxSrvInstNum.
INT h3cEvcSrvInstEncap	1.3.6.1.4.1.43.45.1.10.2.106.1.2.1.2	INTEGER	read-create	Encapsulation mode of a service instance. none : Invalid value. portBased : Match packets by port. It is supported when encapPortBased field of h3cEvcCapabilities is set. untagged : Match untagged packets. It is supported when encapUntagged field of h3cEvcCapabilities is set. tagged : Match all tagged packets. It is supported when encapTagged field of h3cEvcCapabilities is set. svlanIdList: Match packets by SVLAN ID list and untagged packets if PVID of the port is in SVLAN ID list, the SVLAN ID list is denoted by h3cEvcSrvInstSvlanIdListLow and h3cEvcSrvInstSvlanIdListLow. It is supported when encapSvlanId or encapSvlanIdList field of h3cEvcCapabilities is set. Only a VLAN ID is supported when encapSvlanId field of h3cEvcCapabilities is set. svlanIdListOnlyTagged: Match only tagged packets by SVLAN ID list, the SVLAN ID is denoted by h3cEvcSrvInstSvlanIdListLow and h3cEvcSrvInstSvlanIdListLow. It is supported when encapSvlanId (or encapSvlanIdList) and encapSvlanIdOnlyTagged fields of h3cEvcCapabilities are set. Only a VLAN ID is supported when encapSvlanId and encapSvlanIdOnlyTagged field of h3cEvcCapabilities are set.
OCT h3cEvcSrvInstSvlanIdListLow	1.3.6.1.4.1.43.45.1.10.2.106.1.2.1.3	OCTET STRING	read-create	This object contains the first 2048 bits of the 4096 bit vector indicating which SVLAN IDs are assigned to this service instance. The lowest order bit of the first octet corresponds to SVLAN 1, while the highest order bit of the last octet corresponds to SVLAN 2048. A bit that is on (equal to 1) indicates that the corresponding SVLAN ID is assigned to this service instance.
OCT h3cEvcSrvInstSvlanIdListHigh	1.3.6.1.4.1.43.45.1.10.2.106.1.2.1.4	OCTET STRING	read-create	This object contains the second 2048 bits of the 4096 bit vector indicating which SVLAN IDs are assigned to this service instance. The lowest order bit of the first octet corresponds to SVLAN 2049, while the third highest order bit of the last octet corresponds to SVLAN 4094. A bit that is on (equal to 1) indicates that the corresponding SVLAN ID is assigned to this service instance.
ROW h3cEvcSrvInstRowStatus	1.3.6.1.4.1.43.45.1.10.2.106.1.2.1.5	RowStatus	read-create	Operation status of this table entry.
T/F h3cEvcSrvInstEnableInStat	1.3.6.1.4.1.43.45.1.10.2.106.1.2.1.6	TruthValue	read-create	The object is used to configure inbound statistics function to this service instance.
T/F h3cEvcSrvInstEnableOutStat	1.3.6.1.4.1.43.45.1.10.2.106.1.2.1.7	TruthValue	read-create	The object is used to configure outbound statistics function to this service instance.
h3cEvcSrvInstCarTable	1.3.6.1.4.1.43.45.1.10.2.106.1.3		not-accessible	A table of configuring CAR for the service instance.
h3cEvcSrvInstCarEntry	1.3.6.1.4.1.43.45.1.10.2.106.1.3.1		not-accessible	An entry in the table containing CAR configuration on the service instance. If the following entries are not supported by the service instance, or not configured to the service instance, they are zero.
I32 h3cEvcSrvInstInCarIndex	1.3.6.1.4.1.43.45.1.10.2.106.1.3.1.1	Integer32	read-write	The object is used to configure inbound CAR function to this service instance. The CAR index is defined in h3cIfQoSAggregativeCarIndex at A3COM-HUAWEI-IFQOS2-MIB. The default value is 0.
I32 h3cEvcSrvInstOutCarIndex	1.3.6.1.4.1.43.45.1.10.2.106.1.3.1.2	Integer32	read-write	The object is used to configure outbound CAR function to this service instance. The CAR index is defined in h3cIfQoSAggregativeCarIndex at A3COM-HUAWEI-IFQOS2-MIB. The default value is 0.
h3cEvcSrvInstStatInfoTable	1.3.6.1.4.1.43.45.1.10.2.106.1.4		not-accessible	A table for displaying statistics information of service instance.
h3cEvcSrvInstStatInfoEntry	1.3.6.1.4.1.43.45.1.10.2.106.1.4.1		not-accessible	Table entry of the service instance. If the statistics function is not supported by the service instance, or not configured to the service instance, following entries will be zero.
C64 h3cEvcSrvInstInPacketsEx	1.3.6.1.4.1.43.45.1.10.2.106.1.4.1.1	Counter64	read-only	Number of inbound packets received on this service instance.
C64 h3cEvcSrvInstInBytes	1.3.6.1.4.1.43.45.1.10.2.106.1.4.1.2	Counter64	read-only	Byte counts of inbound packets received on this service instance.
C64 h3cEvcSrvInstOutPackets	1.3.6.1.4.1.43.45.1.10.2.106.1.4.1.3	Counter64	read-only	Number of outbound packets transmitted on this service instance.
C64 h3cEvcSrvInstOutBytes	1.3.6.1.4.1.43.45.1.10.2.106.1.4.1.4	Counter64	read-only	Byte counts of outbound packets transmitted on this service instance.

RFC description

Manages Ethernet Virtual Connection (EVC) service instances on H3C switches including encapsulation and traffic statistics.

Start monitoring H3C carrier Ethernet switches/routers 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 A3COM-HUAWEI-EVC-MIB