SSH 客户端间歇性无法建立与 ONTAP 的连接

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适用场景

ONTAP 9
SSH
Red Hat Enterprise Linux (RHEL)

问题描述

RHEL 的 SSH 客户端无法连接到 ONTAP ，并出现错误。

mux_client_request_session: session request failed: Session open refused by peer
 ControlSocket /root/.ssh/XXXX@XXXX:22 already exists, disabling multiplexing
 mux_client_request_session: session request failed: Session open refused by peer
 ControlSocket /root/.ssh/XXXX@XXXX:22 already exists, disabling multiplexing
 mux_client_request_session: session request failed: Session open refused by peer
 ssh_exchange_identification: Connection closed by remote host

ONTAP 会在 messages 日志中记录以下事件。

000000XX.XXXXXXX XXXXXX Fri Sep XX 20XX XX:XX:XX +09:00 [auth_sshd:error:XXXX] error: no more sessions