SL-VCG-MIB

All MIBs › SL-VCG-MIB

Organization: Smartoptics AS

Last Updated: 2004-02-03

Description: MIB for Virtual Concatenation Group (VCG) interfaces on Smartoptics SiteLight optical transport devices, covering GFP-F, GFP-T, and POS framing

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What Is SL-VCG-MIB?

SL-VCG-MIB is a vendor MIB from Smartoptics for Virtual Concatenation Group (VCG) interfaces on its SiteLight optical transport platform, a SONET/SDH technique that binds multiple lower-rate paths into a single higher-bandwidth logical link using GFP-F, GFP-T, or POS framing, with LCAS for dynamic bandwidth adjustment. It exposes the mapping of member paths (STS/VT indices) into a VCG stack along with LCAS control-channel state. Its monitoring focus is on logical link integrity and member-path health: vcgStackLcasStatusOper/Admin show whether LCAS is operationally active versus administratively configured, and vcgStackLcasSourceState/vcgStackLcasSinkState reveal whether each member member path is currently added to or held out of the group — a member stuck in a non-active sink state indicates a failed underlying SONET/SDH path reducing the VCG's effective bandwidth. It builds on SONET/SDH concepts (STS, VT) standardized elsewhere and complements other SiteLight transport MIBs. It is deployed on SiteLight nodes carrying data services (Ethernet, Fibre Channel) mapped over SONET/SDH via virtual concatenation. Engineers can download the SL-VCG-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in SL-VCG-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

Smartoptics SiteLight optical transport platform

Monitoring Examples

An engineer polls vcgStackStatusTable/vcgStackStatusEntry indexed by vcgStackLinkIndex and vcgStackStsIndex to see each member path's vcgStackPathWidth and vcgStackSts1Mapping, then checks vcgStackLcasStatusOper against vcgStackLcasStatusAdmin to confirm LCAS is running as configured. If vcgStackLcasSourceState or vcgStackLcasSinkState for a given member shows it has dropped out of the active group, that member's underlying SONET path has likely failed, reducing the VCG's total available bandwidth even though the logical interface stays up; vcgStackTxSequenceNumber helps correlate sequencing across members during troubleshooting.

What Can Be Monitored

VCG member path mapping
LCAS operational/admin status
member source/sink state
path width configuration
transmit sequence number

Imported Objects

From IF-MIB

InterfaceIndex

From SL-NE-MIB

slService

OBJECT-IDENTITY

From SNMP-FRAMEWORK-MIB

SnmpAdminString

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

Counter64
Gauge32
Integer32
MODULE-IDENTITY
OBJECT-TYPE
Unsigned32
mib-2

From SNMPv2-TC

RowStatus
TEXTUAL-CONVENTION
TimeStamp
TruthValue

How to Use in IPNetwork Monitor

Example using vcgLinkCurrentRxVcatSyncLossSeconds OID:

Select a Smartoptics SiteLight optical transport platform (Virtual Concatenation Group/LCAS member-path status) 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 vcgLinkCurrentRxVcatSyncLossSeconds 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. The number of seconds a VCAT sync loss was detected during this interval. 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, 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
vcgMIB	1.3.6.1.4.1.4515.1.1.10			The MIB module for the Vcat Group (VCG) Interface.
vcgMIBObjects	1.3.6.1.4.1.4515.1.1.10.1
vcgConfig	1.3.6.1.4.1.4515.1.1.10.1.1
vcgStackStatusTable	1.3.6.1.4.1.4515.1.1.10.1.1.1		not-accessible	The table containing status information on the relationships between the VCG and STS sub-layers of network interfaces.
vcgStackStatusEntry	1.3.6.1.4.1.4515.1.1.10.1.1.1.1		not-accessible	Information on a particular relationship between two sub-layers, specifying that one sub-layer runs on 'top' of the other sub-layer. Each sub-layer corresponds to a conceptual row in the ifTable. The rows in the table are created by the NMS. To apply the multiple changes done to the table, the NMS should set the corresponding object vcgLinkConfigStackChangesApply. Befor adding an entry to this table the corresponding VCG-if should already be exist in the vcgLinkConfigTable. When an entry is deleted from vcgLinkConfigTable, the corresponding entries with the same VCG-if should be deleted from the vcgStackStatusTable.
NUM vcgStackLinkIndex	1.3.6.1.4.1.4515.1.1.10.1.1.1.1.1	InterfaceIndex	read-only	The value of the VCG link ifIndex corresponding to the higher-layer of the relationship. The structure of the VCG link ifIndex is: Slot=0, Port=trunk port number Type=219 Path=GID.
NUM vcgStackStsIndex	1.3.6.1.4.1.4515.1.1.10.1.1.1.1.2	InterfaceIndex	read-only	The value of the STS ifIndex corresponding to the lower-layer of the relationship. The structure of the STS ifIndex is: Slot=0 Port=trunk port Type=50 Path=1st sts number in the sonet path.
INT vcgStackPathWidth	1.3.6.1.4.1.4515.1.1.10.1.1.1.1.3	INTEGER	read-create	The width of the path
INT vcgStackSts1Mapping	1.3.6.1.4.1.4515.1.1.10.1.1.1.1.4	INTEGER	read-create	In the case of sdh sts1 path there are two possibilities for mapping: 1. c3->vc3->tu3->tug3-x3->vc4->au4->aug1 ::tu3(1) 2. c3->vc3->au3-x3->aug1 ::au3(2) 3. Otherwise ::na(3)
INT vcgStackTxSequenceNumber	1.3.6.1.4.1.4515.1.1.10.1.1.1.1.5	INTEGER	read-create	The tx sequence number of this path.
INT vcgStackLcasStatusOper	1.3.6.1.4.1.4515.1.1.10.1.1.1.1.6	INTEGER	read-create	The oper status of the relationship between two sub-layers. This value is determined by the Admin status and the Source State and the Sink State of the vcat member.
INT vcgStackLcasStatusAdmin	1.3.6.1.4.1.4515.1.1.10.1.1.1.1.7	INTEGER	read-create	The admin status of the vcat member. This is relevant only for PL-20. For PL-100 all members are active.
INT vcgStackLcasSourceState	1.3.6.1.4.1.4515.1.1.10.1.1.1.1.8	INTEGER	read-create	The Lcas Source State of the Vcat member.
INT vcgStackLcasSinkState	1.3.6.1.4.1.4515.1.1.10.1.1.1.1.9	INTEGER	read-create	The Lcas Sink State of the Vcat member.
ROW vcgStackStatusRow	1.3.6.1.4.1.4515.1.1.10.1.1.1.1.10	RowStatus	read-create	The row status of the relationship between two sub-layers.
vcgLinkConfigTable	1.3.6.1.4.1.4515.1.1.10.1.1.2		not-accessible	A table that contains, one entry for each Vcg interface in the, configuration and service parameters of the Vcg Channel.
vcgLinkConfigEntry	1.3.6.1.4.1.4515.1.1.10.1.1.2.1		not-accessible	An entry containing the result configuration and service parameters of a Vcg Channel. A new entry is created each when an entry is added to the vcgChannelConfigTable with a new VCG-if index. An entry is automaticaly deleted from the table when the last entry of the VCG-if is deleted from the table vcgChannelConfigTable.
NUM vcgLinkConfigIndex	1.3.6.1.4.1.4515.1.1.10.1.1.2.1.1	InterfaceIndex	read-only	The ifIndex of the VCG link. This index is composed of: Slot=0, Port=trunk port number, Type=219, Path=group id.
VCG vcgLinkConfigType	1.3.6.1.4.1.4515.1.1.10.1.1.2.1.2	VcgLinkType	read-create	The type of the vcat group as configured by the NMS.
T/F vcgLinkConfigLcasSupport	1.3.6.1.4.1.4515.1.1.10.1.1.2.1.3	TruthValue	read-create	Should this channel support the LCAS protocol. Configured by the NMS.
T/F vcgLinkConfigExtensionSupport	1.3.6.1.4.1.4515.1.1.10.1.1.2.1.4	TruthValue	read-create	Should this channel support the GFP extension. Configured by the NMS. This field should be true if there aremore than one channel on the same VCG.
INT vcgLinkConfigResetPmCounters	1.3.6.1.4.1.4515.1.1.10.1.1.2.1.5	INTEGER	read-create	Setting this variable to 1 will cause the current interval VCG PM counters of the Channel to be initialized to zero (0).
INT vcgLinkConfigValidIntervals	1.3.6.1.4.1.4515.1.1.10.1.1.2.1.6	INTEGER	read-only	The number of previous near end intervals for which data was collected.
INT vcgLinkConfigLcasHoldOfTime	1.3.6.1.4.1.4515.1.1.10.1.1.2.1.7	INTEGER	read-create	The number of milli-seconds to wait before the Lcas make a transition from Good state to Bad state.
INT vcgLinkConfigLcasWaitToRestoreTime	1.3.6.1.4.1.4515.1.1.10.1.1.2.1.8	INTEGER	read-create	The number of milli-seconds to wait before the Lcas make a transition from Bad state to Good state.
INT vcgLinkConfigStackApplyChanges	1.3.6.1.4.1.4515.1.1.10.1.1.2.1.9	INTEGER	read-create	Writing to this object applies the changes done to the vcgStackStatusTable.
vcgPm	1.3.6.1.4.1.4515.1.1.10.1.2
vcgLinkCurrentTable	1.3.6.1.4.1.4515.1.1.10.1.2.1		not-accessible	The VCG current table contains various statistics being collected for the current 15 minute interval.
vcgLinkCurrentEntry	1.3.6.1.4.1.4515.1.1.10.1.2.1.1		not-accessible	An entry in the VCG Current table.
NUM vcgLinkCurrentIndex	1.3.6.1.4.1.4515.1.1.10.1.2.1.1.1	InterfaceIndex	read-only	The index value which uniquely identifies the VCG interface to which this entry is applicable.
C64 vcgLinkCurrentRxVcatSyncLossSecondsEx	1.3.6.1.4.1.4515.1.1.10.1.2.1.1.2	Counter64	read-only	The number of seconds a VCAT sync loss was detected during this interval.
C64 vcgLinkCurrentRxLcasCrcErrors	1.3.6.1.4.1.4515.1.1.10.1.2.1.1.3	Counter64	read-only	The number of Received Lcas messages with CRC error.
vcgLinkIntervalTable	1.3.6.1.4.1.4515.1.1.10.1.2.2		not-accessible	The VCG current table contains various statistics being collected for the current 15 minute interval.
vcgLinkIntervalEntry	1.3.6.1.4.1.4515.1.1.10.1.2.2.1		not-accessible	An entry in the VCG Interval table.
NUM vcgLinkIntervalIndex	1.3.6.1.4.1.4515.1.1.10.1.2.2.1.1	InterfaceIndex	read-only	The index value which uniquely identifies the VCG interface to which this entry is applicable.
INT vcgLinkIntervalNumber	1.3.6.1.4.1.4515.1.1.10.1.2.2.1.2	INTEGER	read-only	A number between 1 and 96, where 1 is the most recently completed 15 minute interval and 96 is the 15 minutes interval completed 23 hours and 45 minutes prior to interval 1.
C64 vcgLinkIntervalRxVcatSyncLossSeconds	1.3.6.1.4.1.4515.1.1.10.1.2.2.1.3	Counter64	read-only	The number of seconds a VCAT sync loss was detected during this interval.
C64 vcgLinkIntervalRxLcasCrcErrors	1.3.6.1.4.1.4515.1.1.10.1.2.2.1.4	Counter64	read-only	The number of Lcas messages with CRC error occurences during the interval.
vcgLinkDayTable	1.3.6.1.4.1.4515.1.1.10.1.2.3		not-accessible	The Link day table contains various statistics being collected for the pervious 24 hours. interval.
vcgLinkDayEntry	1.3.6.1.4.1.4515.1.1.10.1.2.3.1		not-accessible	An entry in the Link Day table.
NUM vcgLinkDayIndex	1.3.6.1.4.1.4515.1.1.10.1.2.3.1.1	InterfaceIndex	read-only	The index value which uniquely identifies the Link interface to which this entry is applicable.
INT vcgLinkDayNumber	1.3.6.1.4.1.4515.1.1.10.1.2.3.1.2	INTEGER	not-accessible	A number which identifies the 1-day interval for which the set of section related statistics is available. The number is between 1 and n, where n is the number of 1-day intervals supported by the agent. The interval identified by 1 is the current 1-day interval, 2 is the previous (most recently completed) 1-day interval and n is the least recently completed 1-day interval.
C64 vcgLinkDayRxVcatSyncLossSeconds	1.3.6.1.4.1.4515.1.1.10.1.2.3.1.3	Counter64	read-only	The number of seconds a VCAT sync loss was detected during this interval.
C64 vcgLinkDayRxLcasCrcErrors	1.3.6.1.4.1.4515.1.1.10.1.2.3.1.4	Counter64	read-only	The number of Lcas messages with CRC error occurences during the interval.
vcgTraps	1.3.6.1.4.1.4515.1.1.10.1.3
NTF vcgStackValueChange	1.3.6.1.4.1.4515.1.1.10.1.3.1			A vcgStackValueChange trap is sent when the value of the vcgStackLcasStatusOper of an instance vcgStackStatusTable is changed.
NTF vcgStackConfigurationChange	1.3.6.1.4.1.4515.1.1.10.1.3.2			A vcgStackConfigurationChange trap is sent when an entries in the vcgStackStatusTable are added or removed.

RFC description

Manages Virtual Concatenation Group (VCG) interfaces for Smartoptics SiteLight optical platforms.

Start monitoring Smartoptics SiteLight optical transport platform (Virtual Concatenation Group/LCAS member-path status) 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 SL-VCG-MIB