一、HDLC原理

HDLC是由國際標準化組織（ ISO）制定的面向比特的同步數據鏈路層協議，主要用于封裝同步串行鏈路上的數據。HDLC是在數據鏈路層中被廣泛使用的協議之一。

二、HDLC配置

AR1： <Huawei>sys Enter system view, return user view with Ctrl+Z. [Huawei]sysname AR1 [AR1]int s2/0/0 [AR1-Serial2/0/0]link- [AR1-Serial2/0/0]link-protocol hdlc Warning: The encapsulation protocol of the link will be changed. Continue? [Y/N] :y Dec 31 2022 10:45:13-08:00 AR1 %%01IFNET/4/CHANGE_ENCAP(l)[0]:The user performedthe configuration that will change the encapsulation protocol of the link and t hen selected Y. [AR1-Serial2/0/0]ip add 10.1.41.1 24 [AR1-Serial2/0/0]q [AR1]q <AR1>saveThe current configuration will be written to the device. Are you sure to continue? (y/n)[n]:yIt will take several minutes to save configuration file, please wait.......Configuration file had been saved successfullyNote: The configuration file will take effect after being activated <AR1>AR2： <Huawei>sys Enter system view, return user view with Ctrl+Z. [Huawei]sysname AR2 [AR2]int s2/0/0 [AR2-Serial2/0/0]link [AR2-Serial2/0/0]link-protocol hdlc Warning: The encapsulation protocol of the link will be changed. Continue? [Y/N] :y Dec 31 2022 10:46:02-08:00 AR2 %%01IFNET/4/CHANGE_ENCAP(l)[0]:The user performedthe configuration that will change the encapsulation protocol of the link and t hen selected Y. [AR2-Serial2/0/0]ip add 10.1.41.2 24 [AR2-Serial2/0/0]q [AR2]q <AR2>saveThe current configuration will be written to the device. Are you sure to continue? (y/n)[n]:yIt will take several minutes to save configuration file, please wait.......Configuration file had been saved successfullyNote: The configuration file will take effect after being activated <AR2>

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