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NE40E-M2 V800R010C10SPC500 Feature Description - User Access 01

This is NE40E-M2 V800R010C10SPC500 Feature Description - User Access
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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).
Dynamic Address Pool Fundamentals

Dynamic Address Pool Fundamentals

The dynamic address pool technology provides a mechanism to dynamically adjust address pool capacity. After having a dynamic address pool configured, a BRAS sends address segment requests or release requests to the RADIUS server based on its dynamic address pool's address usage and assigns obtained addresses to DHCP or PPP users.

A BRAS interacts with the RADIUS server through RADIUS to apply for or release address segments. A BRAS checks its dynamic address pool's address usage every 10 minutes. If the address usage exceeds the specified upper threshold, the BRAS initiates an address segment request; if the address usage falls below the specified lower threshold, the BRAS initiates an address segment release request.

A BRAS periodically detects the availability of obtained address segments. If the RADIUS server sends a detection success packet in response to the detection request sent by a BRAS, the BRAS can continue using the address segment specified in the detection request. If the RADIUS server sends a detection deny packet in response to the detection request, the BRAS cannot continue using the address segment.

If the address segment assignment packet sent from the RADIUS server to a BRAS gets lost during transmission, the assigned address segment will not be used by any device. To prevent this problem, the RADIUS server needs to periodically detect whether assigned address segments are in use. If some assigned address segments are not in use, the RADIUS server can release these address segments to improve address usage efficiency.

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Updated: 2019-01-02

Document ID: EDOC1100058415

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