公开(公告)号：US20200136985A1

公开(公告)日：2020-04-30

申请号：US16172659

申请日：2018-10-26

Applicant: Cisco Technology, Inc.

Inventor： Saravanan SAMPATHKUMAR ,  Ajay K. MODI ,  Umamaheswararao KARYAMPUDI ,  Vikas V. PATEL ,  Gautam VENKATARAMANAN

IPC: H04L12/863 ,  H04L12/851 ,  H04L12/865 ,  H04L12/861 ,  H04L12/935

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.