OPERATIONAL DEFECT DATABASE
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This bug only impact ASR1001-X, ASR1001-HX, ASR1002-HX routers. Router may crash after a couple hours after upgrading from 16.12.2 to 17.2.1. Affected routers will go reboot loop generating core files each time in bootflash:core as below -=-=-=-=-=-=-=-=-==-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= ---------------------- Starting IOS XE kernel dump from previous failure. System will automatically reboot ---------------------- MemAvailable: 26744 kB -=-=-=-=-=-=-=-=-==-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= device#dir bootflash:core Directory of bootflash:/core/ 753666 -rw- 1 Jun 5 2020 15:11:06 +02:00 .callhome 196612 -rw- 945 Jun 4 2020 11:41:52 +02:00 kernel.rp_1NG_0_inv_log_20200604094108.txt 20 13:17:49 +02:00 kernel.rp_1NG_0.core.TEMP_IN_PROGRESS.txt 6605541376 bytes total (0 bytes free) device#sh version Cisco IOS XE Software, Version 17.02.01r
Issue will NOT be seen with 16.x releases. Issue will be seen with 17.2, 17.1. Please note that the issue is not with the upgrade path but with the image version 17.2 and 17.1.
Workaround is to do a cold restart seems to prevent the boot loop for some time, but it eventually goes to booting loop. There are two solutions: Solution-1:. Upgrade to below mentioned IOS versions or later. Please refer to CSCvv19063. 17.3.2 17.4.1 CSCvu57682 is not a complete fix and the complete fix is in CSCvv19063 Solution-2: Upgrading to rommon release 17.3.(1r). If rommon is upgraded, then IOS release doesn't matter
This bug impacted both cEdge and non-cEdge images on ASR1K
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