网络设备中的软件、配置错误往往会引起网络服务失效或者性能下降。
Network devices may have software faults and configuration faults, which lead to network failure or low performance.
当服务失效的时候，你最好有恰当的流程和工具，在客户发现之前，快速发现问题并恢复。
When that service fails, you better have the proper processes and tools in place to quickly identify the issues and to recover before your customers notice first.
而且此时也是一个很好的时机去深入讨论现有合同中所存在的问题，比如服务失效时的补救措施。
This is a good time to discuss issues in the existing contract that need to be addressed, such as remediation in the event of a lapse of service.
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