Electrical computers and digital processing systems: multicomput – Computer-to-computer session/connection establishing – Network resources access controlling
Reexamination Certificate
2008-02-13
2010-11-30
Luu, Le (Department: 2454)
Electrical computers and digital processing systems: multicomput
Computer-to-computer session/connection establishing
Network resources access controlling
C709S225000, C709S238000
Reexamination Certificate
active
07844719
ABSTRACT:
Network devices can detect whether a tunnel is available (e.g., usable to convey traffic in both directions) by implementing a tunnel detection protocol that uses a combination of idle timers and multiple types of probes. In this protocol, the device at one end of the tunnel is configured as an active device, while the device at the other end of the tunnel is configured as a passive device. The tunnel detection protocol is asymmetric; the active device sends probes to the passive device, but the passive device does not send probes to the active device. By using at least two types of probes, the active device can inform the passive device about the availability of the path from the passive device to the active device. Since the passive device does not need to send probes or process probe replies, control plane processing on the passive device can be reduced.
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Detienne Frederic R. P.
Sethi Pratima
Campbell Stephenson LLP
Cisco Technology Inc.
Luu Le
LandOfFree
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