Invention Grant
- Patent Title: Mitigating priority flow control deadlock in stretch topologies
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Application No.: US16172659Application Date: 2018-10-26
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Publication No.: US10834010B2Publication Date: 2020-11-10
- Inventor: Saravanan Sampathkumar , Ajay K. Modi , Umamaheswararao Karyampudi , Vikas V. Patel , Gautam Venkataramanan
- Applicant: Cisco Technology, Inc.
- Applicant Address: US CA San Jose
- Assignee: Cisco Technology, Inc.
- Current Assignee: Cisco Technology, Inc.
- Current Assignee Address: US CA San Jose
- Agency: Patterson + Sheridan, LLP
- Main IPC: H04L12/863
- IPC: H04L12/863 ; H04L12/851 ; H04L12/935 ; H04L12/865 ; H04L12/861

Abstract:
Embodiments provide for mitigating priority flow control deadlock in stretch topologies by initializing a plurality of queues in a buffer of a leaf switch at a local cluster of a site having a plurality of clusters, wherein each queue of the plurality of queues corresponds to a respective one cluster of the plurality of clusters; receiving a pause command for no-drop traffic on the leaf switch, the pause command including an internal Class-of-Service (iCoS) identifier associated with a particular cluster of the plurality of cluster and a corresponding queue in the plurality of queues; and in response to determining, based on the iCoS identifier, that the pause command was received from a remote spine switch associated with a different cluster than the local cluster: forwarding the pause command to a local spine switch in the local cluster; and implementing the pause command on the corresponding queue in the buffer.
Public/Granted literature
- US20200136985A1 MITIGATING PRIORITY FLOW CONTROL DEADLOCK IN STRETCH TOPOLOGIES Public/Granted day:2020-04-30
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