发明名称 |
SOURCE ROUTING CONVERGENCE IN CONSTRAINED COMPUTER NETWORKS |
摘要 |
In one embodiment, a source routing device (e.g., root device) pre-computes diverse source-routed paths to one or more nodes in a computer network. Upon receiving a particular packet, the device forwards the particular packet on a source-routed first path of the pre-computed diverse paths. In the event the device implicitly detects failure of the first path, then it forwards a copy of the particular packet on a source-routed second path of the pre-computed diverse paths in response. In one embodiment, implicit failure detection comprises seeing a second (repeated) packet with the same identification within a certain time since the first packet, and the second packet is forwarded on the second path. In another embodiment, implicit failure detection comprises not seeing a link-layer acknowledgment returned or receiving an error notification from a node along the broken path, and a stored copy of the particular packet is forwarded on the second path. |
申请公布号 |
US2014355425(A1) |
申请公布日期 |
2014.12.04 |
申请号 |
US201414461023 |
申请日期 |
2014.08.15 |
申请人 |
Cisco Technology, Inc. |
发明人 |
Vasseur Jean-Philippe;Hui Jonathan W. |
分类号 |
H04L12/707;H04L12/703;H04L12/721 |
主分类号 |
H04L12/707 |
代理机构 |
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代理人 |
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主权项 |
1. A method, comprising:
pre-computing diverse source-routed paths to one or more nodes in a computer network by a source routing device; receiving a particular packet at the device; forwarding the particular packet on a source-routed first path of the pre-computed diverse paths; implicitly detecting failure of the first path by the device by determining that there is no returned link-layer acknowledgment for the particular packet from a destination of the particular packet; and forwarding a copy of the particular packet on a source-routed second path of the pre-computed diverse paths in response to the implicitly detected failure of the first path. |
地址 |
San Jose CA US |