All MIBs › ETH-SWITCH-MIB › txNiaUnderRunDrops
txNiaUnderRunDrops
Module: ETH-SWITCH-MIB
OID (symbolic): ETH-SWITCH-MIB::txNiaUnderRunDrops
OID (numeric): 1.3.6.1.4.1.208.39.4.1.1.25
Node type: OBJECT-TYPE
Type: Counter
Access: read-only
Description: The NIA TX buffer gets in underrun if the nimbus is overloaded. This should only happen if a configuration is made which loads the Nimbus with more than a load equal to 44 simplex 10Mbit net.
NOTE: This only counts for NIA100 interfaces.
What is txNiaUnderRunDrops?
Counts transmit-buffer underrun events on this port's NIA100 network-interface-adapter chip, which occur only when the switch's internal switching fabric (the 'Nimbus') is overloaded beyond roughly the equivalent of 44 simplex 10 Mbit connections. This counter is meaningful only on ports built with the NIA100 chipset, and a nonzero value indicates the switch's backplane is oversubscribed.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.4.1.208.39.4.1.1.25 snmpwalk -v2c -c public <target> ETH-SWITCH-MIB::txNiaUnderRunDrops
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.4.1.208.39.4.1.1.25.1 snmpget -v2c -c public <target> ETH-SWITCH-MIB::txNiaUnderRunDrops.1
Start monitoring Ethernet switch with port/VLAN management (vendor not confirmed) with a free 30-day trial of IPNetwork Monitor. Create custom SNMP monitor using the ETH-SWITCH-MIB::txNiaUnderRunDrops OID value, configure state conditions and alerts, and monitor any Ethernet switch with port/VLAN management (vendor not confirmed) from a single console.
OID Breakdown
Upper-level ancestors (7 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 |
| 1.3.6.1.4.1.208 | scanet | SCANET-MIB |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.4.1.208.39 | ethSwitch | ETH-SWITCH-MIB |
| 1.3.6.1.4.1.208.39.4 | statistic | ETH-SWITCH-MIB |
| 1.3.6.1.4.1.208.39.4.1 | txStatTable | ETH-SWITCH-MIB |
| 1.3.6.1.4.1.208.39.4.1.1 | txStatEntry | ETH-SWITCH-MIB |
| 1.3.6.1.4.1.208.39.4.1.1.25 | txNiaUnderRunDrops | ETH-SWITCH-MIB |