We have an issue with ASR1006 reordering fragmented UDP multicast.
Source --> Nexus --> (Ten0/0/0) ASR (Gig0/1/6) --> Receiver
UDP is a multicast traffic consists from relative small (~300 byte) and huge fragmented (~2000 byte) packets. MTU 1500....
I found the cause of reordering - NAT, even nat rules are not for multicast and there's no active translations.
After disabling NAT on ingress interface, correct order of packet flow was restored.
Bug or feature?