Method, system, and apparatus for network device to access packet switched network
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United States of America Patent
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May 7, 2013
Grant Date -
Feb 9, 2012
app pub date -
Aug 11, 2011
filing date -
Jan 10, 2008
priority date (Note) -
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Abstract
A method for a network device to access a packet switched network is applied to a system in which the network device accesses the packet switched network by connecting to PEs in an active-standby mode. The method includes: an active PE and a standby PE each sends a fault detection message to the network device through an interface connected to the network device; the active PE sets the state of the interface to “up” and advertises a route to a remote PE if a fault detection response returned by the network device is received through the interface within a preset period; otherwise, the active PE sets the state of the interface to “down” , and withdraws the advertised route; and the standby PE sets the state of the interface to “up” and advertises another route to the remote PE after receiving a fault detection response through the interface connected to the network device.
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