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CLI-based Configuration Guide - VPN

AR100, AR120, AR150, AR160, AR200, AR1200, AR2200, AR3200, and AR3600 V200R010

This document describes VPN features on the device and provides configuration procedures and configuration examples.
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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 Routes Cannot Be Imported When AS Numbers on the BGP/MPLS IP VPN Are the Same?

Why Routes Cannot Be Imported When AS Numbers on the BGP/MPLS IP VPN Are the Same?

When the AS number in the Update message to be received by the EBGP-enabled device is the same as the AS number on the device, the device does not receive the Update message. This prevents routing loops. In some scenarios, the device needs to receive an Update message that carries the same AS number as the AS number on the device. In Hub and Spoke networking, when the Hub-PE and Hub-CE use EBGP, the Update message received by the Hub-CE contains the AS number of the Hub-PE. To prevent the Hub-PE from discarding such Update message, run the peer allow-as-loop command to set the number of times for the repeated AS number.

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Updated: 2019-08-07

Document ID: EDOC1100033725

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