Error 734 | PPP link control protocol terminated

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Systems & Devices

Canonical

/systems/routers/error-codes/error-734/

Last Updated

Feb 27, 2026

Summary

A PPP/PPPoE session negotiation failed and the link control protocol was terminated.

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What This Code Means

Error 734 is a PPP negotiation failure that can appear in broadband/PPPoE environments. It generally indicates that the PPP link could not be established because a required negotiation step failed or was rejected.

Where Users Usually See This Code

PPPoE dial-up/broadband connection attempts
ISP connection setup screens
Router or modem PPP logs (sometimes mapped to PPP failure)

Why This Code Appears

Authentication or negotiation parameters rejected by the ISP
Incorrect PPP settings (protocol/options)
Line/ISP service issues preventing session establishment

What Typically Happens Next

The connection fails and no internet session is established
Retries may continue to fail until configuration or ISP status is corrected

What This Code Is Not

It is not a Wi-Fi password error
It is not a DNS resolution error by itself

Troubleshooting Checklist

□ Confirm ISP PPPoE credentials and connection type
□ Reboot modem/router and retry to clear stale sessions
□ Verify PPPoE settings match ISP requirements
□ Check for ISP outages or account provisioning issues

Notes And Edge Cases

Some routers surface PPP negotiation failures with different wording; PPP logs provide the most precise cause.

Related Codes

8 links

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