Nokia 7250 IXR-R6: How to do an emergency image reload from the boot loader
By Sai Kiran Pandrala · reviewed by Sai Kiran Pandrala, Editor Last verified: 2026-05-30
| Vendor | Nokia |
|---|---|
| Operating system | SR OS / SR Linux |
| Category | Upgrade Failure |
| Skill level | Intermediate to advanced |
| DIY-able? | Yes with CLI access; some scenarios need Nokia Customer Care + RMA. |
An upgrade on Nokia 7250 IXR-R6 is really three jobs: stage the image, verify integrity, activate. Skipping verify is how you end up with a half-bricked unit at 2am. I have done it exactly once and learned for life.
SR OS / SR Linux provides clear pre- and post-checks. `show version` before and after is the bare minimum; ideally also `admin tech-support` so Nokia Customer Care has a clean before/after diff.
The procedure below assumes you can take a maintenance window. If you cannot, ISSU / hitless options exist on some platforms but vary by code train, check SR OS / SR Linux release notes first.
What this guide covers
Do an emergency image reload from the boot loader on a Nokia 7250 IXR-R6 (SR OS / SR Linux).
Step-by-step
- At the boot loader, configure IP, gateway, TFTP server.
- Download the image.
- Set the boot variable to the new image.
- Reset to boot.
CLI / commands
# Boot recovery prompt: BOF> (Boot Options File)
# Verify image
show version
# Upgrade
file copy cf3:/timos-21.10.R1.tim cf3:/timos.tim
# Save / commit
admin save
# Rollback
rollback
Recovery options
- Boot loader recovery (BOF> (Boot Options File))
- Rollback to the previous image with
rollback - Force failover to a known-good standby (HA platforms)
Frequently asked questions
Will this work on my specific SR OS / SR Linux version?
The procedure reflects current SR OS / SR Linux behaviour. Older releases may need minor syntax adjustments: use the CLI help (? or tab-completion) to verify.
Should I open a Nokia Customer Care 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 Nokia official documentation?
https://documentation.nokia.com, 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
Related fixes
Related guides worth a look while you sort this one out:
- Nokia 7250 IXR-S: How to do an emergency image reload from the boot loader
- Nokia 7250 IXR-X: How to do an emergency image reload from the boot loader
- Nokia 7705 SAR: How to do an emergency image reload from the boot loader
- Nokia 7250 IXR-R6 partial boot then reload loop: Diagnose & Fix
- Nokia 7250 IXR-R6 stuck at boot loader prompt: Diagnose & Fix
- Nokia 7250 IXR-R6: How to recover from a corrupted image during upgrade
References
- Nokia support portal: https://customer.nokia.com
- Nokia knowledge base: https://documentation.nokia.com
- Nokia security advisories: https://www.nokia.com/about-us/security/vulnerability-management/
- Open a case: https://customer.nokia.com
Reference material, not professional advice. Validate against your specific SR OS / SR Linux version and test in a non-production environment before applying.
What changed recently?
Fault diagnosis on a Nokia 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.
Before you start
A few things to confirm so the Nokia device fix goes cleanly:
- Latest firmware downloaded if you're going to update.
- Warranty + support contract status checked. opening sealed parts may void it.
- Backup of current configuration (where applicable) taken.
- Spare parts on hand if you anticipate replacement.
- Adequate workspace, lighting, and time, rushing causes regressions.
Verification checklist
After applying the fix on your Nokia device, confirm:
- The original symptom is no longer reproducible.
- Related features (status LEDs, app sync, paired accessories) still work.
- The device responds to a soft reboot without the fault returning.
- Any error codes that were on display have cleared.
- Documentation (your service log, the brand companion app) reflects the change.
Escalation guide
For a Nokia device, the right escalation depends on impact:
- Cosmetic / minor: log a ticket via the Nokia 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.
Can I roll this back if something breaks?
Yes for software-level changes (firmware rollback, config rollback). Hardware changes are usually one-way. Always back up settings before starting.
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.
What if my model isn't exactly the same revision?
Cross-check the model code on the rating plate against the manufacturer support page. Major firmware generations sometimes shift the menu path; the option is usually under a similarly-named section.
What if the fix returns after a reboot?
Persistent fault returns mean either: a hardware fault (escalate), a configuration that's being overwritten by a sync source (check cloud profiles), or a regression in a recent firmware update (rollback).