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Esteemed Contributor III
February 25, 2006

Technical Tip: ADSL Protocols Supported by FortiGate-60ADSL

  • April 16, 2026 at 12:32 PM
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Description

This article describes the Supported ADSL Protocols.

Scope FortiGate.
Solution

Supported ADSL Protocols.

  1. PPP over Ethernet (PPPoE).
    • Widely used for broadband connections.
    • Supports encapsulation over Ethernet.
    • Configurable for both IPv4 and IPv6 traffic.

  2. PPP over ATM (PPPoA).
    • Commonly used in legacy ADSL setups.
    • Direct encapsulation of PPP frames over ATM.

  3. RFC 1483/2684 Bridged IP over ATM.
    • For bridged mode configurations, IP traffic over ADSL is allowed.

  4. Multimode ADSL Standards.
    • Annex A: ADSL over POTS (Plain Old Telephone Service).
    • Annex B: ADSL over ISDN (Integrated Services Digital Network).

  5. G.DMT (ITU G.992.1).
    • Standard ADSL protocol for downstream rates up to 8 Mbps and upstream rates up to 1 Mbps.

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