Method and apparatus for automatically detecting virtual circuit settings and encapsulation types in a DSL network
First Claim
1. A method for determining whether a DSL line (digital subscriber line) is using PPPoA (point-to-point protocol over asynchronous transfer mode) encapsulation comprising:
- sending a PPP/LCP (point-to-point protocol/link control protocol) configure-request packet;
if a reply to the sent configure-request packet is received, storing the encapsulation type as PPPoA;
sending a PPP/LCP echo-request packet; and
if a reply to the sent echo-request packet is received, storing the encapsulation type as PPPoA,wherein the PPP/LCP configure-request and echo-request packets are sent simultaneously.
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Accused Products
Abstract
Automatic detection of the virtual circuit setting and encapsulation type of a DSL line. A DSL modem determines the correct virtual path identifier (VPI) and virtual channel identifier (VCI) by sending OAM loopback requests to different VPI/VCI pairs until a valid loopback reply is received. PPPoA encapsulation is detected when a valid reply is received to a PPP LCP configuration request or echo request. PPPoE encapsulation is detected when a valid reply is received to a PPP LCP termination request or a PPPoE discovery offer (a PADO packet) is received in response to a PPPoE discovery initiation request (a PADI packet).
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Citations
6 Claims
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1. A method for determining whether a DSL line (digital subscriber line) is using PPPoA (point-to-point protocol over asynchronous transfer mode) encapsulation comprising:
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sending a PPP/LCP (point-to-point protocol/link control protocol) configure-request packet; if a reply to the sent configure-request packet is received, storing the encapsulation type as PPPoA; sending a PPP/LCP echo-request packet; and if a reply to the sent echo-request packet is received, storing the encapsulation type as PPPoA, wherein the PPP/LCP configure-request and echo-request packets are sent simultaneously. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification