LBDT/4/PORTTRAP: OID [OID] Loopback exists on interface([INTEGER1]) [OCTET1] ([OCTET2]), loopback detection status: [INTEGER2], auto loop detection for trap only on VLAN [OCTET3].(Status 1:normal; 2:block; 3:shutdown; 4:trap; 5:nolearn; 6:quitvlan)
A loop is detected on the Layer 2 network connected to the interface.
| Alarm ID | Alarm Severity | Alarm Type |
|---|---|---|
| 1.3.6.1.4.1.2011.5.25.174.3.3 | Warning | communicationsAlarm(2) |
| Name | Meaning |
|---|---|
| OID | Indicates the MIB object ID of the alarm. |
| INTEGER1 | Indicates the interface index. |
| OCTET1 | Indicates the interface name. |
| OCTET2 | An alarm is reported when a loop is detected in a VLAN (not a VLAN in which loops are detected automatically and only alarms are reported). If untagged packets are used to detect the loop, the value of this parameter is Untagged. If tagged packets are used to detect the loop, the value of this parameter is the VLAN ID in the VLAN tag. |
| INTEGER2 | Indicates the loop detection status on the interface. |
| OCTET3 | Indicates the list of VLANs where loops are detected automatically. Only alarms are reported. |
After the interface is shut down, all traffic on the interface is interrupted.
After the interface is blocked, all traffic except protocol packets is interrupted.
After nolearn is configured on the interface, the interface does not learn MAC addresses.
After the trap function is configured on the interface, the interface continuously reports traps.
After the quitvlan function is configured on the interface, the interface is deleted from the VLAN where a loop occurs and services of traffic in the VLAN are interrupted.