Quick troubleshooting view
The network becomes very slow or unstable after connection to a new switch.
- Limit the impactmpact.
- Collecting Evidence.
- Test the the simplest hypothesis.
- Correct the confirmed cause rather than the symptom.
- Document the change and result.
- Establish supervision if the defect can recur.
Contextual technician plan
Identify whether a position, service or entire site is affected.
“Limit the impactmpact.” should produce an observation that clearly confirms or rules out “STP/RSTP”.
If the observation is normal, lower “STP/RSTP” in the ranking and continue with the next distinct check.
If the observation is abnormal, keep the evidence and investigate “STP/RSTP” first. Related action: Correct the confirmed cause rather than the symptom.
Keep the message accurate, time, and associated logs.
“Collecting Evidence.” should produce an observation that clearly confirms or rules out “double link”.
If the observation is normal, lower “double link” in the ranking and continue with the next distinct check.
If the observation is abnormal, keep the evidence and investigate “double link” first. Related action: Document the change and result.
Compare with equipment or functional path.
“Test the the simplest hypothesis.” should produce an observation that clearly confirms or rules out “bridge not managed”.
If the observation is normal, lower “bridge not managed” in the ranking and continue with the next distinct check.
If the observation is abnormal, keep the evidence and investigate “bridge not managed” first. Related action: Establish supervision if the defect can recur.
Apply only one change at a time and retester.
“Correct and validate.” should produce an observation that clearly confirms or rules out the targeted hypothesis.
If the observation is normal and continue with the next distinct check.
If the observation is abnormal, keep the evidence before broader changes.
Repeat the same validation test after the correction and confirm the original symptom is gone. Validate stability before closing the incident.
Before changing configuration, record the current value and a way back.
Cadader if the impact extends, if the data are at risk or if the cause involves irreversible modification.
The network becomes very slow or unstable after connection to a new switch.
Causes probables
- STP/RSTP
- double link
- bridge not managed
Diagnostic étape par étape
- 1
Limit the impactmpact.
Identify whether a position, service or entire site is affected.
- 2
Collecting Evidence.
Keep the message accurate, time, and associated logs.
- 3
Test the the simplest hypothesis.
Compare with equipment or functional path.
- 4
Correct and validate.
Apply only one change at a time and retester.
Solutions possibles
- Correct the confirmed cause rather than the symptom.
- Document the change and result.
- Establish supervision if the defect can recur.
Cadader if the impact extends, if the data are at risk or if the cause involves irreversible modification.