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Cisco Bug: CSCtc32566 - Downgrade from 3.9.0 to 3.6.1 is failing due to eth_server process crash

Last Modified

Jan 12, 2017

Products (1)

  • Cisco Carrier Routing System

Known Affected Releases


Description (partial)


Upgrade and downgrade between IOS XR 3.9.0 and IOS XR 3.6.1 is unsuccessful.


Seen on CRS-16 slot chassis with fully populated chassis.  This is  seen on scaled up chassis in one test bed, where this operation leads to a process restart on 3.6.1 code base that eventually results in upgrade abort. Issue is not applicable to 3.9 code base
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