TwoCiscoroutersareconnectedtoeachotherandareenabledCDP.Seriallineisup，protocolisalsoupbutcdpneighbornotworking.WhatlayeroftheOSImodeldoestheproblemmostlikelyexist？

问答题

简答题

Two Cisco routers are connected to each other and are enabled CDP. Serial line is up，protocol is also up but cdp neighbor not working. What layer of the OSI model does the problem most likely exist？

【参考答案】

Data link layer.

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备案号：湘ICP备14005140号-3

经营许可证号：湘B2-20140064

CCNP(642-832)