All MIBs › EFM-CU-MIB › efmCuTargetSnrMgn
efmCuTargetSnrMgn
Module: EFM-CU-MIB
OID (symbolic): EFM-CU-MIB::efmCuTargetSnrMgn
OID (numeric): 1.3.6.1.2.1.167.1.1.1.1.5
Node type: OBJECT-TYPE
Type: Unsigned32
Access: read-write
Description: Desired EFMCu port SNR margin to be achieved on all PMEs
assigned to the port, during initialization. (The SNR margin is the difference between the desired SNR and the actual SNR).
Note that 802.3ah recommends using a default target SNR margin of 5 dB for 2BASE-TL ports and 6 dB for 10PASS-TS ports in order to achieve a mean Bit Error Rate (BER) of 10^-7 at the PMA service interface.
This object is read-write for the -O subtype EFMCu ports (2BaseTL-O/10PassTS-O) and not available for the -R subtypes.
Changing of the target SNR margin MUST be performed when the link is Down. Attempts to change this object MUST be rejected (in case of SNMP with the error inconsistentValue), if the link is Up or Initializing.
Note that the current SNR margin of the PMEs comprising the EFMCu port is represented by efmCuPmeSnrMgn.
This object MUST be maintained in a persistent manner.
What is efmCuTargetSnrMgn?
This read-write value (0-21 dB) sets the desired signal-to-noise ratio margin the port should target during line initialization, essentially a safety buffer against noise on the copper pair. The standard recommends 5 dB for 2BASE-TL and 6 dB for 10PASS-TS to hold a bit error rate around 10^-7. Like other init parameters, it can only be changed while the link is down; the currently achieved margin is reported separately via efmCuPmeSnrMgn.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.2.1.167.1.1.1.1.5 snmpwalk -v2c -c public <target> EFM-CU-MIB::efmCuTargetSnrMgn
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.2.1.167.1.1.1.1.5.1 snmpget -v2c -c public <target> EFM-CU-MIB::efmCuTargetSnrMgn.1
Set instance 1 (SNMPv2c):
snmpset -v2c -c private <target> 1.3.6.1.2.1.167.1.1.1.1.5.1 i <value>
Start monitoring DSLAM/EFM access multiplexer or CPE (802.3ah EFM Copper, vendor-neutral IETF standard) with a free 30-day trial of IPNetwork Monitor. Create custom SNMP monitor using the EFM-CU-MIB::efmCuTargetSnrMgn OID value, configure state conditions and alerts, and monitor any DSLAM/EFM access multiplexer or CPE (802.3ah EFM Copper, vendor-neutral IETF standard) from a single console.
OID Breakdown
Upper-level ancestors (6 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 |
| 1.3.6.1.2 | mgmt | AXON-MIB |
| 1.3.6.1.2.1 | mib_2 | AXON-MIB |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.2.1.167 | efmCuMIB | EFM-CU-MIB |
| 1.3.6.1.2.1.167.1 | efmCuObjects | EFM-CU-MIB |
| 1.3.6.1.2.1.167.1.1 | efmCuPort | EFM-CU-MIB |
| 1.3.6.1.2.1.167.1.1.1 | efmCuPortConfTable | EFM-CU-MIB |
| 1.3.6.1.2.1.167.1.1.1.1 | efmCuPortConfEntry | EFM-CU-MIB |
| 1.3.6.1.2.1.167.1.1.1.1.5 | efmCuTargetSnrMgn | EFM-CU-MIB |