Patent ID: 6982958
Filing Date: 2006-01-03
Classification: H04L,H04Q

Abstract:
1. A system for transmitting a loopback cell within a switching node of an ATM connection, said switching node including a first adapter having associated ports and a second adapter having associated ports, wherein said loopback cell enters said switching node by a first adapter port, said system comprising: processing means within said switching node for detecting a loopback condition when an ATM cell enters said first adapter; a routing header function for appending a routing label to said ATM cell indicating that said ATM cell is a loopback cell to be looped back on said ATM connection, said routing label being appended to said loopback cell only if a loop control bit is set by a control point of said switching node within said first adapter, and a switching engine for transferring said loopback cell to said first adapter port utilizing said appended routing label.