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SSH connection to a VM instance is slow although the network is normal

TroubleshootingZCF · CloudVersions3.x-5.5.30Article IDKB-100254Updated2026-08-19

Issue/Introduction

This article describes how to troubleshoot a slow SSH connection to a VM instance when the network is normal. It applies to the initial diagnosis and resolution of similar issues in ZStack Cloud.

Environment

  • Product: ZCF
  • Component: Cloud
  • Version: 3.x-5.5.30

Symptoms

When the network is normal, establishing an SSH connection to the VM instance is slow.

Possible causes

Possible causes include:

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SSH connection to a VM instance is slow although the network is normal | KB-100254 | ZStack Resource Center