Ciena 5171 Service Aggregation Service Edge power supply failed: Diagnose & Fix

By Sai Kiran Pandrala · reviewed by Sai Kiran Pandrala, Editor Last verified: 2026-05-30

What this guide covers

Diagnose and recover from power supply failed on a Ciena 5171 Service Aggregation Service Edge.

Full fix path

1. Confirm which PSU failed.
2. Verify the remaining PSU has enough capacity for the device + line cards + PoE budget.
3. Note the failed PSU's part number.
4. Replace during a maintenance window, most enterprise PSUs are hot-swappable.
5. After replacement, confirm both PSUs show OK.

CLI / commands

# Verify hardware state
software show
chassis show inventory
chassis show fans temperature

# Collect for Ciena TAC
show diagnostics

When to RMA

• Repeated failure after re-seat and power-cycle
• Visible burn, scorching, or physical damage
• POST or memory diagnostic failure
• Hardware crashinfo without a software workaround

Frequently asked questions

Will this work on my specific SAOS (Service-Aware OS) / Blue Planet version?

The procedure reflects current SAOS (Service-Aware OS) / Blue Planet behaviour. Older releases may need minor syntax adjustments: use the CLI help (? or tab-completion) to verify.

Should I open a Ciena TAC case immediately?

Open one if you suspect hardware failure or the symptom persists after a maintenance-window reload. Make sure your support entitlement is active first.

Where can I find the Ciena official documentation?

https://www.ciena.com/insights/knowledge-base, search the product family + feature name.

Is this procedure safe in production?

Test in a lab or maintenance window first. Capture pre-change state so you can roll back.

Related guides

• All Ciena fix guides → /ciena/
• All vendor guides → /vendors/

References

• Ciena support portal: https://www.ciena.com/services/support/
• Ciena knowledge base: https://www.ciena.com/insights/knowledge-base
• Ciena security advisories: https://www.ciena.com/services/support/security-advisories
• Open a case: https://www.ciena.com/services/support/contact-support

Reference material, not professional advice. Validate against your specific SAOS (Service-Aware OS) / Blue Planet version and test in a non-production environment before applying.

What changed recently?

Fault diagnosis on a Ciena device goes faster when you map the symptom to a recent change:

• Did firmware update in the last 7 days?
• Did the network (router, ISP, VPN) change?
• Was the device moved physically?
• Did paired devices (phone, hub, app) update?
• Were any accessories swapped in or out?

The answer narrows the root cause to a manageable subset.

Safety + preconditions

Before any work on a Ciena device:

• Unplug from mains for any internal-access procedure.
• Discharge stored energy (capacitors in PSUs, residual battery charge) per manufacturer guidance.
• Use ESD-safe handling for boards and modules. no carpet, no wool sleeves.
• Avoid moisture; never apply liquids near vents or connectors.
• If you smell smoke, see scorch marks, or feel uneven heat, stop and escalate.

Confirm it stuck

Before you walk away from a Ciena device fix, run through:

1. Reproduce the original trigger, does the issue reappear? 2. Check the device's status / health screen for any new alerts. 3. Confirm paired devices (app, hub, controller) reconnected. 4. Save / commit any configuration changes per the device's normal workflow. 5. Note the change in your maintenance log with date + firmware version.

Escalation guide

For a Ciena device, the right escalation depends on impact:

• Cosmetic / minor: log a ticket via the Ciena app or web portal. Response 1-3 business days.
• Mid-impact: phone support. Have your serial number ready.
• Critical (production down, safety issue): in-person dealer / TAC visit. Bring proof of purchase.
• Out of warranty: third-party repair shop with manufacturer-certified technicians.

More frequently asked questions

Will the procedure work on the international variant?

Some features and firmware paths are region-locked. Check the model spec sheet to confirm your variant supports the menu option referenced. If you're outside the US/EU, look for the regional support portal.

How often should I run preventive checks?

Quarterly for most consumer devices; monthly for production / commercial devices. Set a calendar reminder so the device stays healthy between issues.

Will this void my warranty?

Applying official firmware updates and following the user manual will not affect warranty. Opening sealed components, jumping safety circuits, or using third-party parts can void warranty in most jurisdictions.

Should I update firmware first or last?

Update firmware first if a release note specifically mentions your symptom. Otherwise, finish the troubleshooting flow first, then update; that way you can isolate whether the update or the underlying fix solved it.

How long does this fix usually take?

Most users complete the steps in 20-45 minutes the first time, and 5-10 minutes on subsequent runs once the menu paths are familiar.

Field notes from real incidents on Ciena

When I work on Ciena 5171 Service Aggregation Service Edge power supply failed: Diagnose & Fix the rhythm I lean on is the one I have built over years of these tickets. I never push a config change without a rollback timer; commit confirmed on Junos, archive on IOS, or a scripted timeout on EOS. Counters lie if you do not clear them; clear counters, reproduce, and read the deltas, not the cumulative numbers. Half the BGP weirdness I have triaged was a route-map that someone copied from a template without reading what it actually filtered.

Tools I actually reach for

For Ciena 5171 Service Aggregation Service Edge power supply failed: Diagnose & Fix on Ciena the cheapest signal I can land usually comes from a known order of operations, not a kitchen-sink approach. I start with packet capture on the ingress interface (TAC will ask for it) because it is the lowest-friction way to confirm the failure is real and reproducible. If that returns ambiguous data, I escalate to show logging last 200, show tech-support (capture for TAC), traceroute vrf <vrf> <target>, and finally to show platform hardware capacity only when the cheaper tools cannot reach the layer the failure lives in. That ordering matches the failure surfaces I have actually seen on Ciena units over the last few years, not an abstract taxonomy. The cheap signals gate the expensive ones so the investigation does not balloon into a multi-hour exercise.

Verification I run before I close the ticket

Before I mark Ciena 5171 Service Aggregation Service Edge power supply failed: Diagnose & Fix resolved on a Ciena unit, the verification loop below is what I actually run. Each step proves a different layer is green, and the order matters - the cheap checks gate the more expensive ones so I never burn an hour on a deep test that a shallow one would have failed in seconds.

show ip route <prefix>  # confirm best path post-change

If that one comes back clean, move to the next check. If it does not, stop and dig in there before layering more verification on top of a red signal.

show spanning-tree summary  # confirm topology stability

If that one comes back clean, move to the next check. If it does not, stop and dig in there before layering more verification on top of a red signal.

show logging | include %LINK|%LINEPROTO|%BGP|%OSPF

If that one comes back clean, move to the next check. If it does not, stop and dig in there before layering more verification on top of a red signal.

show bgp summary  # confirm session state after route changes

If that one comes back clean, move to the next check. If it does not, stop and dig in there before layering more verification on top of a red signal.

show interfaces <int> | include errors|drops|CRC

Only when every line above runs clean do I close the ticket and update the runbook with the timestamps. A green verification that nobody can reproduce is not a fix, it is luck waiting to regress.

Where I check first when the docs disagree

When two sources contradict each other on a Ciena detail, the disambiguation order I lean on is stable across products and across years. RFCs for the protocol in question (rfc-editor.org) is where I start for the ground-truth view. vendor release notes for the running software version is where I start for the ground-truth view. vendor TAC knowledge base is where I start for the ground-truth view. Random blog posts and reseller wikis are signal, not ground truth, and I treat them as such until the references above either confirm or contradict the claim. The cost of trusting an unauthoritative source on Ciena 5171 Service Aggregation Service Edge power supply failed: Diagnose & Fix is rarely worth the time it saved.

Pitfalls I have walked into on this exact path

The shortcuts that look smart on Ciena 5171 Service Aggregation Service Edge power supply failed: Diagnose & Fix have a habit of biting back. The pitfalls below are the ones I have personally walked into on a Ciena unit, not things I read about. Most spanning-tree storms I have walked into started with a user-side switch that nobody documented; topology audits pay off the day the loop forms. Counters lie if you do not clear them; clear counters, reproduce, and read the deltas, not the cumulative numbers. Half the BGP weirdness I have triaged was a route-map that someone copied from a template without reading what it actually filtered. When in doubt I revert to the slower path that the manual prescribes - the time I save by skipping it is always smaller than the time I spend cleaning up afterwards.

What I tell the next on-call

When I hand Ciena 5171 Service Aggregation Service Edge power supply failed: Diagnose & Fix off to the next person on rotation, the three lines I leave in the runbook are these. First, the symptom signature on Ciena - not a paraphrase, the exact string that surfaces in logs or on the screen. Second, the diagnostic that gave the highest signal in the least time. Third, the exact verification command whose green output justified closing the ticket. That trio is what turns a one-off fix into a runbook entry the next engineer can use without paging me at three in the morning.

I also add a one-line note on the cost of getting this wrong. For Ciena 5171 Service Aggregation Service Edge power supply failed: Diagnose & Fix on a Ciena unit, the cost is rarely the replacement part or the patch itself. It is the downtime, the second site visit, and the trust deficit you spend with whoever owns the asset when the fix does not hold. That framing keeps the next on-call from choosing the cheap-looking shortcut that ends up costing the most in elapsed hours and goodwill.

Related fixes

Related guides worth a look while you sort this one out:

• Ciena 5170 Service Aggregation power supply failed: Diagnose & Fix
• Ciena 5171 Service Aggregation Service Edge fan tray failed: Diagnose & Fix
• Ciena 5171 Service Aggregation Service Edge: How to rollback to the previous image after a failed upgrade
• Ciena 5171 Service Aggregation Service Edge all ports dead: Diagnose & Fix
• Ciena 5171 Service Aggregation Service Edge management module red status: Diagnose & Fix
• Ciena 5171 Service Aggregation Service Edge partial boot then reload loop: Diagnose & Fix