Logical failures occur when the frame relay link integrity verification protocol, sometimes called the local management interface (LMI), fails to successfully perform a protocol handshake between the switch and the CPE.
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- 当帧中继链路完整性验证协议(有时也叫本地管理接口(LMI)不能成功地在交换机与CPE之间执行协议握手时,逻辑失效就出现。