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Daily update. 2019-10-11 12:06:31
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@ -189,7 +189,7 @@ RouterA#debug frame-relay lmi
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帧中继支持可对服务质量(Quality of Service, QoS)施加影响的标记。比如,帧中继头部就包含了一个丢弃资质为(a DE(Discard Eligible) bit)。对于QoS的帧中继环境,数据包可籍由丢弃资质位加以标记,而这就告诉服务提供商那些特定数据包不是非常重要,在壅塞时可被丢弃。这样做将令到那些没有设置丢弃资质位的数据包优先。
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在帧中继环境中可配置其它参数,就是向前显式壅塞通知与向后显式壅塞通知(Forward Explicit Congestion Notifications(FECNs) and Backward Explicit Congestion Notifications(BECNs)),这通常会是一个突如其来的考试问题(which commonly crops up as an exam question)。帧中继设备在配置了FECNs或BECNs时,就可通知壅塞设备,并可造成发送速率的下降(The Frame Relay equipment, if configured to do so, can notify devices of congestion and can cause the slowing down of the sending rates)。
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在帧中继环境中可配置其它参数,就是向前显式壅塞通知与向后显式壅塞通知(Forward Explicit Congestion Notifications(FECNs) and Backward Explicit Congestion Notifications(BECNs)),这通常会是一个突如其来的考试问题(which commonly crops up as an exam question)。帧中继设备在配置了FECNs或BECNs时,就可通知壅塞设备,并可导致发送速率的下降(The Frame Relay equipment, if configured to do so, can notify devices of congestion and can cause the slowing down of the sending rates)。
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## 配置帧中继(Configuring Frame Relay)
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