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This issue is VERY common. Setting the LACP Timeout does not fix this issue:N5548# sh lacp interface Ethernet112/1/10Local Port: Eth112/1/10 MAC Address= 0-2a System Identifier=0x8000,0-2a Port Identifier=0x8000,0x2d0a Operational key=33978 LAC...
Just in case anyone comes across this later. You need to add the "boot system flash:/" keyword. eg:
Router01#sh run | i bootboot-start-markerboot system flash:/boot system flash bootflash:asr1000rp1-adventerprisek9.03.16.04a.S.155-3.S4a-ext.binboot-e...