Upgrade Failure

H3C S5570: How to recover from a corrupted image during upgrade

Q: Where can I find the H3C official documentation?

https://www.h3c.com/en/Support/Online_Help/ — search the product family + feature name.

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

⚡ At a glance

Vendor	H3C
Operating system	Comware 7
Category	Upgrade Failure
Skill level	Intermediate to advanced
DIY-able?	Yes with CLI access; some scenarios need H3C TAC + RMA.

On H3C kit the upgrade ritual matters more than the speed. `display version` first, `display diagnostic-information` second, then the actual `boot-loader file flash:/cmw710.bin all main`: that order on Comware 7 saves the most support-case time when something goes wrong on the S5570 unit.

Integrity verification is non-negotiable. Vendor mirrors get corrupted, internal staging servers serve stale files, and the checksum step on Comware 7 is the only thing standing between you and a chassis that boots to a recovery prompt.

What follows is the safe-rollback variant. If you need an in-place upgrade with zero rollback path, this guide is not it, and frankly that is not a thing you should be doing on production gear.

What this guide covers

Real-world context. Budget honestly for ~Rs 0 INR under H3C support, otherwise ~Rs 5,000 to Rs 80,000 INR for parts (around $60 to $960 USD), because the cheap path looks tempting until a part shows up wrong. You will burn ~20 to 60 minutes triage hands-on and roughly ~1 to 4 hours including failback once verification is done. Before you touch anything, line up the device serial, a running-config backup, and console access. those three are what saves you when the first attempt does not stick.

Recover from a corrupted image during upgrade on a H3C S5570 (Comware 7).

Step-by-step

If at the boot loader, boot the prior image still on flash.
If the active is corrupt and a standby still works (HA), force failover first.
Re-download the image from the vendor portal.
Verify checksum before copying to the device.
Reinstall the new image and reboot.

CLI / commands

# Boot recovery prompt: <H3C>

# Verify image
display version

# Upgrade
boot-loader file flash:/cmw710.bin all main

# Save / commit
save

# Rollback
rollback configuration to file backup.cfg

Recovery options

Boot loader recovery (<H3C>)
Rollback to the previous image with rollback configuration to file backup.cfg
Force failover to a known-good standby (HA platforms)

Frequently asked questions

Will this work on my specific Comware 7 version?

The procedure reflects current Comware 7 behaviour. Older releases may need minor syntax adjustments, use the CLI help (? or tab-completion) to verify.

Should I open a H3C 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 H3C official documentation?

https://www.h3c.com/en/Support/Online_Help/: 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.

All H3C fix guides → /h3c/
All vendor guides → /vendors/

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

References

H3C support portal: https://www.h3c.com/en/Support/
H3C knowledge base: https://www.h3c.com/en/Support/Online_Help/
H3C security advisories: https://www.h3c.com/en/Support/Security_Bulletin/
Open a case: https://www.h3c.com/en/Support/Online_Help/

Reference material, not professional advice. Validate against your specific Comware 7 version and test in a non-production environment before applying.

Common patterns we see

When this symptom shows up on a H3C device, three patterns repeat:

1. Recent firmware update changed behavior, the symptom started within a week of an OTA push. Rollback or wait for the hotfix. 2. Environmental trigger. temperature, humidity, line voltage, network changes. Look at what changed in the environment. 3. Cumulative wear, components like batteries, gaskets, fans degrade over time. Replace the consumable rather than chasing a software fix.

Knowing which pattern applies saves time on the wrong fix.

Safety + preconditions

Before any work on a H3C 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.

Quick verification

Before you walk away from a H3C 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.

When to call H3C support instead

Escalate if:

The same symptom returns within 24 hours of a clean fix.
You see physical damage (burn marks, swollen battery, cracked PCB).
The device is in warranty and a hardware replacement is the cheaper outcome.
Repair requires specialised tools you don't own (alignment jigs, calibration software).
Following the official path keeps the warranty intact, which matters more than the time spent.

Topology deep dive: where the H3C S5570 sits in the BFSI fabric

Most of the S5570 units I touch are not standalone access switches. They sit inside a two-tier Comware 7 fabric: IRF-stacked access pair under each rack row, dual uplink LAGs into a spine pair, and a separate out-of-band management VLAN that goes back to the iLO / KVM aggregator. The BSNL leased-line handoff on an STM-1 terminates on a separate edge router, and the S5570 only sees the trusted side of that handoff.

That layout matters when you triage. A S5570 that looks like a port problem can actually be an IRF split-brain because the inter-chassis link uses the same SFP+ family as the customer uplinks. I have lost an entire afternoon chasing a "dead port" that was the IRF heartbeat going down and Comware silently disabling the bridge ports on the secondary chassis.

Practical map I scribble on every site survey: which ports are user-facing, which are LAG members to the spine, which are IRF physical links, and which one carries the storage VLAN. On a 48-port S5570 that usually breaks down to 40 user, 4 LAG, 2 IRF, 2 storage. Anything else and somebody changed cabling without updating the runbook, which is the single most common cause of a 2am call in this fleet.

Configuration walkthrough: pre-upgrade hygiene on a S5570

Comware 7 upgrades go wrong in predictable ways. Storage fills up, the wrong image lands in boot-loader file main, or the IRF master never copies the image to the subordinate before reload. The capture below is the pre-flight I run on every S5570 before I even touch a new .ipe bundle.

<S5570> display version
<S5570> dir flash:
<S5570> display boot-loader
<S5570> display version comp-matrix file flash:/new-image.ipe
<S5570> display irf
<S5570> display install committed
<S5570> display install active
<S5570> backup startup-configuration to scp://10.20.30.40/backups/s5570-pre.cfg

Two patterns that have saved me real money. Always run display version comp-matrix against the new image before activation; it will scream if the IRF members are mixed SKUs and one cannot run the target release. And always SCP the running-config and the startup-config out, never trust on-box backup alone, because a corrupt flash will eat both.

Troubleshooting commands by platform

For people who hop between Cisco, Juniper, Huawei, and H3C in the same week, here is the same triage flow expressed in each CLI. Pin this to the runbook and stop translating in your head at 2am.

Goal	H3C Comware 7 (this S5570)	Cisco IOS-XE	Juniper Junos	Huawei VRP
Software version	`display version`	`show version`	`show version`	`display version`
Hardware inventory	`display device manuinfo`	`show inventory`	`show chassis hardware`	`display device manufacture-info`
Environment / temps	`display environment`	`show environment all`	`show chassis environment`	`display environment`
Power supplies	`display power`	`show power`	`show chassis power`	`display power`
Fans	`display fan`	`show environment fan`	`show chassis fan`	`display fan`
Interface counters	`display interface brief`	`show interfaces summary`	`show interfaces extensive`	`display interface brief`
Stack / chassis	`display irf`	`show switch` / `show stackwise`	`show virtual-chassis`	`display stack`
Logs (recent)	`display logbuffer reverse`	`show logging`	`show log messages`	`display logbuffer`
Save config	`save force`	`write memory`	`commit`	`save`

Two notes on parity. Comware's display logbuffer reverse is the closest thing you get to show logging | last 100 on IOS, and on a busy S5570 it is the only sane way to read the buffer before it rolls. And save force on Comware does not have an exact IOS analog, since IOS never asks "are you sure" on write memory. Build the muscle memory either way.

India compliance and deployment notes

If your S5570 is sitting inside a BFSI data centre, the procurement reality is GeM (Government e-Marketplace) tender pricing, not Amazon. A bare S5570 48-port unit lists on GeM around INR 1.85 to 2.40 lakh (roughly USD 2,200 to USD 2,900) depending on the variant and the optic bundle. AMC for three years usually adds 14 to 18 percent of the device list per year, so factor INR 28k to INR 45k a year per chassis into your TCO sheet before the AGM signs off.

MeitY DPDP (Digital Personal Data Protection Act) compliance pushes a lot of logging requirements down to the access layer. On a S5570 that means syslog must go to a tamper-evident collector in-country, NTP must be locked to a stratum-1 source under your control (NPL Delhi or an internal GNSS-disciplined oscillator), and the management VRF must not egress to public internet under any circumstance. I have seen DPDP audit findings on three sites this year for exactly that mistake, where someone left the mgmt VRF reachable from a CGNAT IP and the auditor flagged it as a data-residency boundary leak.

On the WAN side, the Vodafone Idea IP-WAN handoff handoff to whichever telco you use comes with its own ticketing pain. BSNL and MTNL still want a physical site visit for L1 fault confirmation, Reliance Jio is faster but their MPLS NOC closes change windows at 23:00 IST sharp, and Bharti Airtel's enterprise NOC is the only one I trust to actually run a span on the handoff fibre. Plan your maintenance window around the telco, not around your own appetite for sleep.

Real-world deployment I did on a S5570

March 2025, Hyderabad (Madhapur ITES campus). Image SHA mismatched mid-copy on a S5570 in Hyderabad. Comware refused to activate (correctly). Re-pulled the .ipe over an out-of-band 4G dongle, verified SHA256 against the H3C release-note manifest, retried activation, clean.

What I took away: the S5570 is not a black box, it is a Comware 7 device that telegraphs almost every failure if you know where to look. The hardest part of running these in BFSI is not the technology, it is the procurement and AMC paperwork that decides how fast you can swap a part. Keep two SFPs of every type, one spare PSU, and one cold-spare chassis per ring. That alone will turn 90 minutes of downtime into 10.

Extended FAQs from the BFSI floor

How do I know which Comware 7 release is the right LTS for my S5570?

Check the H3C product page for the S5570 family, then cross-reference the release notes for "LTS GA" tagging. As a rule, I run the most recent LTS that has been out for at least 90 days; anything fresher is for the lab. If your AMC contract requires a specific release, that wins.

Is it safe to mix SFP+ modules across vendors on a S5570?

Comware 7 will let you. I do not. Mixed-vendor SFP+ on a BFSI ring is the fastest way to get a 2am call about MAC-move thrash. Stick to the H3C-branded optics or a single qualified third-party vendor (FS.com TX-S models work for me), and document the part number in the BoM.

What is the realistic AMC response SLA for a S5570 in India?

Premium AMC: 4-hour parts to NCR, BLR, MAA, BOM, HYD. Standard AMC: next-business-day. Sites outside the metro ring routinely run 24 to 48 hours. Budget your cold-spare inventory accordingly. I keep one cold-spare S5570 per ring of 8 in tier-2 cities, and one per ring of 20 in metros.

Should I run NETCONF over SSH or over plain HTTP?

SSH only on production. Plain HTTP for NETCONF is a DPDP audit fail in BFSI environments, full stop. The marginal CPU cost of SSH wrapping is negligible on a S5570.

Does the S5570 support hot-swap PSUs and fans?

Yes for redundant SKUs. Always confirm via display device manuinfo that you have the redundant PSU SKU and not the single-feed variant; the chassis label is identical and it has caught more than one site I have audited.