I am upgrading an ASR1002 to "asr1000rp1-adventerprisek9.03.16.05.S.155-3.S5-ext.bin" from "asr1000rp1-adventerprisek9.03.05.01.s.152-1.s1.bin". [from 15.2 to 15.5] Is there an upgrade path to get from this very old version to the latest?
Can I go straight to the latest in one try?
It doesn't appear that there is an upgrade path. You can go directly from 15.2 to 15.2 using the consolidated software package and a maintenance window to reboot.
Here are a couple of links for upgrade instructions and release notes:
You can go straight.
Don't forget to upgrade the ROMmon.
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