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Friday, November 20, 2009

The Cisco 1721 router is not saving configuration after I switch off


The most common reason for a router not saving its config is that its config register has been set to ignore the startup config (typically a setting of 0x2142). The best way to check the setting is through the show version. If the config register is set to 0x2142, then use the config command config-register 0x2102 to fix it.

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