https://dev.networkhaven.org/tags/cisco/ Recent content in Cisco on Network Haven Hugo en-US Sat, 16 May 2026 12:00:00 +0200 https://dev.networkhaven.org/posts/cisco-ignore-startup-config/ Sat, 16 May 2026 12:00:00 +0200 https://dev.networkhaven.org/posts/cisco-ignore-startup-config/ <p>The startup configuration can be bypassed by booting into ROMMON or during normal operation. In either case, a reboot is required.</p> <p>This is particularly useful, for example, if you need to perform a password recovery because you have forgotten your password, or for troubleshooting purposes.</p> <h2 id="configuration-in-ios">Configuration in IOS</h2> <pre tabindex="0"><code>Switch# configure terminal ! to activate Switch(config)# system ignore startup-config ! to deactivate Switch(config)# no system ignore startup-config </code></pre><h2 id="configuration-in-rommon">Configuration in ROMMON</h2> <p>In the background, the IOS command simply sets the ROMMON variable SWITCH_IGNORE_STARTUP_CONFIG to 1 or 0 which we can also do manually.</p>