All MIBs › RAPID-CITY › rcLinkOscillation
rcLinkOscillation
Module: RAPID-CITY
OID (symbolic): RAPID-CITY::rcLinkOscillation
OID (numeric): 1.3.6.1.4.1.2272.1.21.8
Node type: NOTIFICATION-TYPE
Description:
A rcLinkOscillation trap signifies that the SNMPv2 entity, acting in an agent role, has detected an excessive number of link state transitions on the specified port.
What is rcLinkOscillation?
This notification trap is sent when the system detects an excessive number of link state transitions (up/down flapping) on a network port within a short time window, indicating a possible hardware fault, optical signal problem, or cable connectivity issue. Link oscillation disrupts network stability by repeatedly bringing sessions up and down and can degrade performance for all connected devices. A network operator would set alerting rules on this trap to immediately identify and manually investigate oscillating ports and fix the underlying physical or configuration problem.
Examples
Send this trap to an SNMP manager — replace <manager> with the IP or hostname of your monitoring server (SNMPv2c):
snmptrap -v2c -c public <manager> '' RAPID-CITY::rcLinkOscillation snmptrap -v2c -c public <manager> '' 1.3.6.1.4.1.2272.1.21.8
Listen for incoming traps on the manager host (-f keeps it in the foreground, -Lo prints to stdout — useful for testing):
snmptrapd -f -Lo -c /dev/null authCommunity log public
Example snmptrapd log entry:
zoo11-linux.zoo [UDP: [192.168.30.111]:49388->[192.168.30.10]:162]: DISMAN-EVENT-MIB::sysUpTimeInstance = Timeticks: (205723884) 23 days, 19:27:18.84 SNMPv2-MIB::snmpTrapOID.0 = OID: RAPID-CITY::rcLinkOscillation
OID Breakdown
| Numeric OID | Name | Module |
|---|---|---|
| 1 | iso | LANART-AGENT |
| 1.3 | org | BIANCA-BRICK-PPP-MIB |
| 1.3.6 | dod | BIANCA-BRICK-PPP-MIB |
| 1.3.6.1 | internet | BIANCA-BRICK-PPP-MIB |
| 1.3.6.1.4 | private | BIANCA-BRICK-PPP-MIB |
| 1.3.6.1.4.1 | enterprises | ANIROOT-MIB |
| 1.3.6.1.4.1.2272 | rapidCity | RAPID-CITY |
| 1.3.6.1.4.1.2272.1 | rcMgmt | RAPID-CITY |
| 1.3.6.1.4.1.2272.1.21 | rcTraps | RAPID-CITY |
| 1.3.6.1.4.1.2272.1.21.8 | rcLinkOscillation | RAPID-CITY |