All MIBs › MODULES-MIB › fethPortSourceAddrChanges
fethPortSourceAddrChanges
Module: MODULES-MIB
OID (symbolic): MODULES-MIB::fethPortSourceAddrChanges
OID (numeric): 1.3.6.1.4.1.81.12.6.1.1.1.27
Node type: OBJECT-TYPE
Type: Counter
Access: read-only
Description: This counter is incremented by one for each time that the fethPortLastSourceAddress attribute for this port has changed.
This may indicate whether a link is connected to a single DTE or another multi-user segment.
The approximate minimum time for rollover of this counter is 8 hours. REFERENCE Reference IEEE Draft Std 802.3u/D4 Rptr Mgt, 30.4.3.1.19, aSourceAddressChanges. Reference IETF 100Base-T Repeater MIB, rptr100AddrTrackSourceAddrChanges.
What is fethPortSourceAddrChanges?
Counts how often the recorded source MAC address (fethPortLastSourceAddress) on this port changes, helping an admin distinguish a port feeding a single dedicated device from one feeding a shared multi-user segment; it rolls over in as little as 8 hours on a busy shared port, much faster than the 10Mbps equivalent due to the higher traffic this fast port typically carries.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.4.1.81.12.6.1.1.1.27 snmpwalk -v2c -c public <target> MODULES-MIB::fethPortSourceAddrChanges
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.4.1.81.12.6.1.1.1.27.1 snmpget -v2c -c public <target> MODULES-MIB::fethPortSourceAddrChanges.1
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OID Breakdown
Upper-level ancestors (8 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 |
| 1.3.6.1.4.1.81 | lannet | GEN-MIB |
| 1.3.6.1.4.1.81.12 | eth | LANNET-MIB |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.4.1.81.12.6 | feth | MODULES-MIB |
| 1.3.6.1.4.1.81.12.6.1 | fethPort | MODULES-MIB |
| 1.3.6.1.4.1.81.12.6.1.1 | fethPortTable | MODULES-MIB |
| 1.3.6.1.4.1.81.12.6.1.1.1 | fethPortEntry | MODULES-MIB |
| 1.3.6.1.4.1.81.12.6.1.1.1.27 | fethPortSourceAddrChanges | MODULES-MIB |