All MIBs › FAST-ETHERNET-MIB › ctFastEthernetCurrentOperationalMode
ctFastEthernetCurrentOperationalMode
Module: FAST-ETHERNET-MIB
OID (symbolic): FAST-ETHERNET-MIB::ctFastEthernetCurrentOperationalMode
OID (numeric): 1.3.6.1.4.1.52.4.1.2.9.1.1.1.5
Node type: OBJECT-TYPE
Type: INTEGER
Access: read-write
Description: Indicates the current operational mode of this port. The value of this object is the logical OR of current opertational mode and how we arrived at that mode, whether it be by Auto-Negotiation(2), Manual-Config(4) or default. Where each mode is given the values below:
other(1) Initializing or no link, ability unknown Auto-Negotiation(2) Auto-Negotiation/Parallel Detection Manual-Config(4) Manually Configured 10BASE-T(8) 10BASE-T 10BASE-TFD(16) Full duplex 10BASE-T 100BASE-TX(32) 100BASE-TX 100BASE-TXFD(64) Full Duplex 100BASE-TX 100BASE-T4(128) 100BASE-T4 100Base-FX(256) 100Base-FX 100Base-FXFD(512) Full Duplex 100Base-FX
For example, a port operating at 100Base-TX(32) achieved through Auto-Negotiation(2) would have a value of 34(32 + 2). If the port was manually configured(4) for 100Base-TX(32) this object would have a value of 36(32 + 4).
Values written to this object are limited to values read from ctFastEthernetLocalTechnologyAbility, with the addition of Manual-Config(4) but excluding other(1). Therefore if ctFastEthernetLocalTechnologyAbility has a value of 98 writing a value of 256 would result in an error. That is to say 100Base-FX is not supported on this port.
A set to a value of Auto-Negotiation(2) will result in auto-negotiation being enabled and will cause link re-negotiation. Note: this re-negotiation will in every case cause temporary link loss during the link re-negotiation. Any other set with Auto-Negotiation(2) included will result in an error since you can not force an operational mode and auto-negotiation at the same time.
A set to a value of Manual-Config(4) will result in auto-negotiation being disabled but the port staying at its current operational mode until device reset/power down at which time the port will come up in default mode. A subsequent read will indicate only the current operational mode achieved by default means.
A set to any other value (port is being manually configured) must reflect a single ability. For example writing a value of 68 would result in auto-negotiation being disabled and the port being manually configured(4) for 100Base-TXFD(64). However a write of 100 would result in an error.
What is ctFastEthernetCurrentOperationalMode?
This read-write bitmask reports (and can set) the port's current speed/duplex mode plus how it got there — Auto-Negotiation(2), Manual-Config(4), or default — using the same technology bit codes as ctFastEthernetLocalTechnologyAbility. Admins write to it to force a specific mode (which must be a single ability the hardware supports) or to enable Auto-Negotiation, understanding that any mode change to this object causes a temporary link loss during renegotiation. For example, writing 68 (64+4) manually configures the port for 100BASE-TX full duplex, disabling auto-negotiation until the next reset.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.4.1.52.4.1.2.9.1.1.1.5 snmpwalk -v2c -c public <target> FAST-ETHERNET-MIB::ctFastEthernetCurrentOperationalMode
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.4.1.52.4.1.2.9.1.1.1.5.1 snmpget -v2c -c public <target> FAST-ETHERNET-MIB::ctFastEthernetCurrentOperationalMode.1
Set instance 1 (SNMPv2c):
snmpset -v2c -c private <target> 1.3.6.1.4.1.52.4.1.2.9.1.1.1.5.1 i <value>
Start monitoring Cabletron Systems/Enterasys managed Ethernet switch (100BASE-T Fast Ethernet negotiation) with a free 30-day trial of IPNetwork Monitor. Create custom SNMP monitor using the FAST-ETHERNET-MIB::ctFastEthernetCurrentOperationalMode OID value, configure state conditions and alerts, and monitor any Cabletron Systems/Enterasys managed Ethernet switch (100BASE-T Fast Ethernet negotiation) from a single console.
OID Breakdown
Upper-level ancestors (11 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 |
| 1.3.6.1.4.1.52 | cabletron | Cabletron-MIB |
| 1.3.6.1.4.1.52.4 | mibs | CT-PRIORITY-QUEUING |
| 1.3.6.1.4.1.52.4.1 | ctron | CTRON-ISDN-CONFIGURATION-MIB |
| 1.3.6.1.4.1.52.4.1.2 | ctDataLink | CTRON-ISDN-CONFIGURATION-MIB |
| 1.3.6.1.4.1.52.4.1.2.9 | ctFastEthernet | CTRON-MIB-NAMES |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.4.1.52.4.1.2.9.1 | ctFastEthernetCtl | FAST-ETHERNET-MIB |
| 1.3.6.1.4.1.52.4.1.2.9.1.1 | ctFastEthernetCtlTable | FAST-ETHERNET-MIB |
| 1.3.6.1.4.1.52.4.1.2.9.1.1.1 | ctFastEthernetCtlEntry | FAST-ETHERNET-MIB |
| 1.3.6.1.4.1.52.4.1.2.9.1.1.1.5 | ctFastEthernetCurrentOperationalMode | FAST-ETHERNET-MIB |