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概述衡量磁盘性能的基本指标。使用率，是指磁盘处理 I/O 的时间百分比。过高的使用率（比如超过 80%），通常意味着磁盘 I/O 存在性能瓶颈。饱和度，是指磁盘处理 I/O 的繁忙程度。过高的饱和度，意味着磁盘存在严重的性能瓶颈。当饱和度为 100% 时，磁盘无法接受新的 I/O 请求。IOPS（I
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查看网络基本信息ip a第一，网络接口的状态标志。ifconfig 输出中的 RUNNING ，或 ip 输出中的 LOWER_UP ，都表示物理网络是连通的，即网卡已经连接到了交换机或者路由器中。如果你看不到它们，通常表示网线被拔掉了。第二，MTU 的大小。MTU 默认大小是 1500，根据网络架
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CPU使用率CPU 使用率描述了非空闲时间占总 CPU 时间的百分比，根据 CPU 上运行任务的不同，又被分为用户 CPU、系统 CPU、等待 I/O CPU、软中断和硬中断等。1.用户 CPU 使用率，包括用户态 CPU 使用率（user）和低优先级用户态 CPU 使用率（nice），表示 CPU
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配置IP地址
静态NATip nat inside source static 192.168.1.2 1.1.1.102int g0/0ip nat outsideint g0/1ip nat inside
动态NATaccess-list 1 permit 192.168.1.0 0.0.
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自动汇总：不精确手工汇总：路由匹配时最长匹配原则，路由条目越多匹配时间越长，减少路由条目，降低转发延长
EIGRP特点：高级距离矢量协议快速收敛支持VLSM和不连续子网局部更新支持多种网络层协议灵活的网络设计组播和单播代替广播更新在网络中的任何地方实现手动汇总100%无环路的无类路由支持WANs a
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静态路由管理距离：不同协议之间 0-255 越小越可信直连 0静态路由 1EIGRP 90OSPF 110RIP 120度量值：相同协议，不同路径之间 越小越可信静态路由是单向？？？适用环境：网络规模小，拓扑结构固定，管理员熟悉网络全局配置模式：ip route 目标网段 下一跳(IP或接口
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