摘要：CMTS系统中CNR（Cisco Network Registrar）作为对多台头端设备下的PC、CM管理,对整个系统重要性非常之高,做双机备份,是一个现实而又可靠的办法。但做好备份,还需要适时的做好主备配置上的同步,否则会出现意想不到的故障。
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