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S600-E V200R013C00 Configuration Guide - User Access and Authentication

This document describes the configurations of User Access and Authentication Configuration, including AAA, NAC, and Policy Association.
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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Why 802.1X Authentication Users Cannot Pass Authentication When a Layer 2 Switch Exists Between the 802.1X-Enabled Device and Users?

Why 802.1X Authentication Users Cannot Pass Authentication When a Layer 2 Switch Exists Between the 802.1X-Enabled Device and Users?

The EAP packet in 802.1X authentication is a bridge protocol data unit (BPDU). By default, Huawei switches do not perform Layer 2 forwarding for BPDUs. If a Layer switch still exists between the 802.1X-enabled device and a user, Layer 2 transparent transmission must be configured on the switch. Otherwise, the EAP packet sent by the user cannot reach the authentication device and the user cannot pass authentication.

To configure Layer 2 transparent transmission of 802.1X authentication packets, perform the following operations:
  1. Run the l2protocol-tunnel user-defined-protocol dot1x protocol-mac 0180-c200-0003 group-mac 0100-0000-0002 command in the global view of the Layer 2 switch.
  2. Run the l2protocol-tunnel user-defined-protocol dot1x enable and bpdu enable commands on the interface connecting the Layer 2 switch to the uplink network and all downlink interfaces connected to users.
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Updated: 2019-04-20

Document ID: EDOC1100066170

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