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Cisco Bug: CSCvu34653 - CSR stuck in Bootloop while upgrading to 17.2.1r on Azure.

Last Modified

Aug 29, 2020

Products (9)

  • Cisco Cloud Services Router 1000V Series
  • Cisco 4221 Integrated Services Router
  • Cisco 4321 Integrated Services Router
  • Cisco 4331 Integrated Services Router
  • Cisco 4431 Integrated Services Router
  • Cisco Cloud Services Router 1000V
  • Cisco 4461 Integrated Services Router
  • Cisco 4451-X Integrated Services Router
  • Cisco 4351 Integrated Services Router

Known Affected Releases


Description (partial)

Issue 1: 
CSR Routers on Azure gets stuck in a boot loop upon upgrading to 17.2.1r IOS, the problem occurs when CSR cannot detect CDROM/DVD, when the CSR attempts to boot any of these messages will be observed on serial console:-

ERROR:No DVD device detected, unable to provision. Completed 10 tries.
CSR main: boot agent enter: mounting cdrom
No DVD device detected, unable to provision.
ERROR: rc = WaAgent.MountCdrom()

Issue 2:
CSR1kv overrides the existing configuration with 17.2.1r bootstrap configuration when upgrading from a 16.12.X IOS-XE release software to 17.2.1r software version. 

Config properties that will be reapplied are: 
1) hostname <>
2) crypto key generate
3) vrf definition GS 
4)i p route GigabitEthernet1 <>
5) ip route vrf GS GigabitEthernet1<> global
6) app-hosting appid guestshell config
7) ip access-list standard GS_NAT_ACL

Perform an IOS upgrade to 17.2.1r using Azure.
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  • Full Description (including symptoms, conditions and workarounds)
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