All MIBs › TN-SAP-MIB › tnTopologyChangeSapState
tnTopologyChangeSapState
Module: TN-SAP-MIB
OID (symbolic): TN-SAP-MIB::tnTopologyChangeSapState
OID (numeric): 1.3.6.1.4.1.7483.6.1.3.4.5.0.5
Node type: NOTIFICATION-TYPE
Description:
The tnTopologyChangeSapState notification is generated when a SAP has transitioned state to blocking or broken from a state other than forwarding. This event complements what is not covered by tnTopologyChangeSapMajorState. The spanning tree topology has been modified and it may denote loss of customer access or redundancy. Check the new topology against the provisioned topology to determine severity of connectivity loss.
What is tnTopologyChangeSapState?
This OID sends an alert notification when a network switch port (called a SAP) changes from carrying traffic to being blocked due to redundancy protocols. It indicates the network topology has changed, which may mean customers lost connectivity or backup paths are now in use. An operator would receive this alert to investigate whether network failover worked correctly or if service was unexpectedly disrupted.
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> '' TN-SAP-MIB::tnTopologyChangeSapState snmptrap -v2c -c public <manager> '' 1.3.6.1.4.1.7483.6.1.3.4.5.0.5
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]:51593->[192.168.30.10]:162]: DISMAN-EVENT-MIB::sysUpTimeInstance = Timeticks: (445423497) 51 days, 13:17:14.97 SNMPv2-MIB::snmpTrapOID.0 = OID: TN-SAP-MIB::tnTopologyChangeSapState
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 |
| 1.3.6.1.4.1.7483 | tropic | TROPIC-GLOBAL-REG |
| 1.3.6.1.4.1.7483.6 | tnProducts | TROPIC-GLOBAL-REG |
| 1.3.6.1.4.1.7483.6.1 | tnSRMIB | TROPIC-GLOBAL-REG |
| 1.3.6.1.4.1.7483.6.1.3 | tnSRNotifyPrefix | TROPIC-GLOBAL-REG |
| 1.3.6.1.4.1.7483.6.1.3.4 | tnServNotifications | TN-SERV-MIB |
| 1.3.6.1.4.1.7483.6.1.3.4.5 | tnTstpTrapsPrefix | TN-SERV-MIB |
| 1.3.6.1.4.1.7483.6.1.3.4.5.0 | tnTstpTraps | TN-SERV-MIB |
| 1.3.6.1.4.1.7483.6.1.3.4.5.0.5 | tnTopologyChangeSapState | TN-SAP-MIB |