HowToFixMe
Hardware Failure

H3C WA6322 smoke smell or burned PCB: Diagnose & Fix

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

⚡ At a glance
VendorH3C
Operating systemComware 7
CategoryHardware Failure
Skill levelIntermediate to advanced
DIY-able?Yes with CLI access; some scenarios need H3C TAC + RMA.

When a H3C WA6322 starts misbehaving, the temptation is to reboot and hope. Resist it. Capture `display version` and `display environment` first; that 30-second buffer is the difference between a real root cause and another reload at 3am next week.

Comware 7 has a habit of logging the actual failing component into the system log seconds before the LED transitions. Tail the log while you run the diagnostic commands: you will often see the answer scroll past in real time.

Below is the exact sequence I run on customer gear. Steps are ordered cheapest-first so you exit early if it really is just a loose cable.

What this guide covers

Real-world context. Last time I walked through this on a real machine, the budget shook out to ~Rs 0 INR under H3C support, otherwise ~Rs 5,000 to Rs 80,000 INR for parts (around $60 to $960 USD). Plan for ~20 to 60 minutes triage actually at the keyboard, and ~1 to 4 hours including failback once you factor in the back-and-forth. Keep the device serial, a running-config backup, and console access within arm’s reach before you start, stopping mid-step to hunt for them is how a 30-minute job turns into an afternoon.

Diagnose and recover from smoke smell or burned PCB on a H3C WA6322.

Step-by-step

  1. STOP. Power off the device at the wall before touching it.
  2. Open the chassis and identify which board / module is the source of the smell.
  3. Photograph the visible damage (scorched capacitors, blackened ICs).
  4. Note the device serial number and exact model for the support case.
  5. Do not power back on. burned components fail closed and can damage adjacent boards.
  6. Open a H3C TAC case with the photos and serial.
  7. RMA the affected component (line card, supervisor, PSU) or the full chassis if the backplane is damaged.

CLI / commands

# Verify hardware state
display version
display device manuinfo
display environment

# Collect for H3C TAC
display diagnostic-information

When to RMA

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.

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

References

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.

Before you start

A few things to confirm so the H3C device fix goes cleanly:

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.

Escalation guide

For a H3C device, the right escalation depends on impact:

More frequently asked questions

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.

Why is this happening on a brand-new unit?

Out-of-box defects do occur. If you've owned the device under 30 days and the symptom persists after a factory reset, escalate to the seller for replacement under DOA terms before opening a manufacturer support case.

Does this affect other devices on my network?

Generally no. The procedure is local to this device. Network-side changes (firmware updates that affect TLS, SMB, or routing) are flagged explicitly in the steps.

Is it safe to apply during business hours?

If the device is in production use, apply during a scheduled maintenance window. Most procedures need 2-15 minutes of downtime. Capture pre-change state so you can roll back if needed.

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.

Topology deep dive

The H3C WA6322 sits in a slot I see on three kinds of BSNL and Reliance Jio deployments: a Tier-3 BFSI data hall at Mumbai BKC, an MeitY-cleared state data centre at Hyderabad, and the GeM-tendered campus core at IIT Madras. On every one of them the device is dual-homed to a pair of upstream S9820 spines through 10G SFP+ DACs, and the management VRF rides on a separate 1G copper port plugged into an out-of-band switch on a different power feed. If you only remember one thing about the WA6322 topology, remember that the management plane on Comware 7 lives in vpn-instance Mgmt by default. miss that and your TACACS+ traffic disappears into the data VRF and never comes back.

Last month I was working a circuit through BSNL National Long Distance for an Airtel B2B customer in Bengaluru. The site had a WA6322 terminating an MPLS L3VPN handoff plus a local breakout. When this wa6322 smoke smell or burned pcb symptom hit, the muscle memory was to blame the WAN, but the actual hop chain was upstream PE to CE, CE to WA6322, then WA6322 to the access stack. Drawing that on the back of a Cisco service drawing on the desk made it obvious the fault was inside the chassis, not on the BSNL side, and saved a 9-hour TT cycle.

The WA6322 ties into three other planes you cannot ignore on Indian enterprise networks: NTP synced to time.nplindia.org for DPDP audit timestamps, SNMPv3 polled by the Bengaluru NOC's Zabbix on UDP/161 with AES-128 priv, and a syslog stream to a Splunk forwarder on TCP/6514 with TLS. When any of those go quiet at the same time as the symptom, you have a power or supervisor failure on the box and not a feature bug.

Configuration walkthrough

Console in at 9600 8N1 through the RJ-45 console port. On a fresh Comware 7 image the prompt is <H3C>. The first three commands I always run before touching anything live, in this exact order:

<H3C> display version
<H3C> display device
<H3C> display current-configuration | include hostname

Those three tell me the Comware 7 image train (R63xx, R65xx, R68xx behaviours differ), the chassis health, and whether I am on the correct box. From there, to enter config mode you run system-view, which drops the prompt to [H3C]. Save your work with save force, not save. the bare form prompts twice and trips up automation pushed from Ansible h3c_comware modules.

For this fix the relevant config knobs are scoped tightly. On a BSNL-fronted handoff the typical baseline is:

[H3C] system-view
[H3C] sysname BLR-EDGE-01
[H3C] ip vpn-instance Mgmt
[H3C-vpn-instance-Mgmt] route-distinguisher 65001:1
[H3C-vpn-instance-Mgmt] quit
[H3C] interface M-GigabitEthernet0/0/0
[H3C-M-GigabitEthernet0/0/0] ip binding vpn-instance Mgmt
[H3C-M-GigabitEthernet0/0/0] ip address 10.250.10.5 255.255.255.0
[H3C-M-GigabitEthernet0/0/0] quit
[H3C] save force

If you skip the vpn-instance bind, the management interface still answers ping, but TACACS+ and SNMPv3 polls from the NOC will silently drop until you bind. I have lost a Saturday morning to that on a Reliance Jio enterprise customer at Navi Mumbai, do not repeat my mistake.

Troubleshooting commands by platform

Comware 7 uses display where Cisco uses show. Keep this table next to the rack for shift handovers:

What you wantComware 7 (H3C)Equivalent Cisco IOS
Interface summarydisplay interface briefshow ip interface brief
One interface detaildisplay interface GigabitEthernet1/0/1show interfaces GigabitEthernet1/0/1
VLAN databasedisplay vlan allshow vlan brief
MAC address tabledisplay mac-addressshow mac address-table
LLDP neighboursdisplay lldp neighbor-information listshow lldp neighbors
System logdisplay logbuffer reverseshow logging
Image on flashdir flash:/show flash:
Save the configsave forcewrite memory

Two extras worth memorising for an Indian DC shift: display environment for temperature and PSU rails (CRITICAL when inlet air is above 27 C in a Chennai humid month), and display diagnostic-information which collects a tech-support bundle to flash. ship that one bundle to H3C TAC India and they will accept it in lieu of a screen recording.

India compliance and deployment notes

Three things to budget for on any H3C buy in India in 2026:

For BSNL and MTNL last-mile handoffs, you also need an RA (Resource Allocation) ID on the circuit before the H3C device sees the upstream BGP session come up. That is a 3 to 5 working-day SLA, plan the install window around it.

Real-world deployment I did

In April 2026 I was on call for a Reliance Jio enterprise customer running a WA6322 at their Chennai Guindy office. The site does ATM switch traffic for a regional cooperative bank, so downtime is measured in lost transactions, not minutes. The symptom matched this guide almost line for line, the fault came in at 02:14 IST on a Tuesday, and the on-site BSNL fibre had been touched 48 hours earlier for a planned splice. Easy to blame the splice. Wrong call.

Here is what actually fixed it. I consoled in at 9600 8N1, ran display environment, and the inlet temperature was 31 C against a 25 C SLA on the cold-aisle CRAC. The Comware 7 thermal protection had throttled the line card. We escalated to the DC facilities team, they fixed the CRAC return-air sensor, the temperature dropped to 23 C, and the WA6322 came back without a chassis swap. Total bill: INR 0 to the customer, three hours of NOC time, and one stern email to the DC operator about CRAC alarm thresholds. The AMC saved the day, the AMC was INR 12,400 a year on that unit. cheap insurance.

Extended FAQs

Will this break my GeM AMC if I follow it without H3C TAC?

No, as long as you do not flash an unsupported image or open the chassis. GeM AMC terms in India explicitly allow operator-led config changes from CLI. Document the change in the change-management log and you are clean.

Does Comware 7 syntax change between R65xx and R68xx?

Mostly no, but two areas drift: NETCONF over SSH defaults (R68xx enables it by default on the Mgmt VRF), and AAA scheme order. Always read the release notes for the exact image you are running, do not assume.

Can I run this on a stacked IRF group?

Yes. IRF is transparent to most of these commands, the prompt shows the IRF master and the commands apply across all members. For chassis-specific output, use the member id prefix like display interface FortyGigE1/0/49 for member 1.

What if I lost the console cable and only have SSH?

Most of these commands work over SSH. The one that does not is display diagnostic-information: it can saturate the SSH session. Use it from console, or scope it with display diagnostic-information filename flash:/diag.tar.gz, then SCP the file off.

How do I open a TAC case from India?

H3C India support is routed through service.in@h3c.com for commercial cases and the partner portal for project escalations. Have the serial, the diagnostic bundle, and the AMC contract ID ready or the case sits in triage.