All MIBs › Fore-Switch-MIB › vcShmem2UnintentionalLostCells
vcShmem2UnintentionalLostCells
Module: Fore-Switch-MIB
OID (symbolic): Fore-Switch-MIB::vcShmem2UnintentionalLostCells
OID (numeric): 1.3.6.1.4.1.326.2.2.1.5.5.1.1.6
Node type: OBJECT-TYPE
Type: Counter32
Access: read-only
Description: The number of cells on this channel that were dropped due to output memory shortages or the CLP (Cell Loss Priority) threshold.
What is vcShmem2UnintentionalLostCells?
This counter records ATM cells dropped on a virtual circuit due to output buffer exhaustion or because the cell's CLP (Cell Loss Priority) bit flagged it for discard when congestion occurs. Operators use this metric to detect oversubscribed output ports or excessive traffic bursts that the switch cannot absorb. Rising values indicate quality-of-service issues or the need for traffic policing.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.4.1.326.2.2.1.5.5.1.1.6 snmpwalk -v2c -c public <target> Fore-Switch-MIB::vcShmem2UnintentionalLostCells
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.4.1.326.2.2.1.5.5.1.1.6.1 snmpget -v2c -c public <target> Fore-Switch-MIB::vcShmem2UnintentionalLostCells.1
SNMPv3 example:
snmpget -v3 -l authPriv -u snmpv3-user -a SHA -A "AuthPassword1" -x AES -X "PrivPassword1" <target> vcShmem2UnintentionalLostCells.1
Start monitoring Fore Systems (later Marconi) ForeRunner ATM switch (board/port/VPI-VCI inventory) with a free 30-day trial of IPNetwork Monitor. Create custom SNMP monitor using the Fore-Switch-MIB::vcShmem2UnintentionalLostCells OID value, configure state conditions and alerts, and monitor any Fore Systems (later Marconi) ForeRunner ATM switch (board/port/VPI-VCI inventory) from a single console.
OID Breakdown
Upper-level ancestors (10 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 |
| 1.3.6.1.4 | private | AirPair-MIB |
| 1.3.6.1.4.1 | enterprises | AirPair-MIB |
| 1.3.6.1.4.1.326 | fore | COMMON-GOLF-MIB |
| 1.3.6.1.4.1.326.2 | systems | COMMON-GOLF-MIB |
| 1.3.6.1.4.1.326.2.2 | atmSwitch | Fore-Common-MIB |
| 1.3.6.1.4.1.326.2.2.1 | hardware | Fore-Common-MIB |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.4.1.326.2.2.1.5 | shmem | Fore-Switch-MIB |
| 1.3.6.1.4.1.326.2.2.1.5.5 | connShmem2Group | Fore-Switch-MIB |
| 1.3.6.1.4.1.326.2.2.1.5.5.1 | channelShmem2Table | Fore-Switch-MIB |
| 1.3.6.1.4.1.326.2.2.1.5.5.1.1 | channelShmem2Entry | Fore-Switch-MIB |
| 1.3.6.1.4.1.326.2.2.1.5.5.1.1.6 | vcShmem2UnintentionalLostCells | Fore-Switch-MIB |