Does CSR 1000v support HA feature & how?

Question

Does CSR 1000v support HA feature?
I noticed that redundancy command support in configuration mode,but neither sso/ha mode can config,
Router(config-red)#?
Redundancy configuration commands:
  default   Set a command to its defaults
  exit      Exit from redundancy configuration mode
  main-cpu  Enter main-cpu mode
  mode      redundancy mode for this chassis
  no        Negate a command or set its defaults
  timer     Select a timer to configure
Router(config-red)#mode ?
  none  no redundancy
Router#show platform 
Chassis type: CSR1000V            
Slot      Type                State                 Insert time (ago) 
R0        CSR1000V            ok, active            00:18:57      
F0        CSR1000V            ok, active            00:18:57      
Is it possible to enable HA feature in csr1000v?
I noticed that in startup, R1 was insert，but not online，which was in disabled state.

Answer 1

Alan,
HA provided across a network segment within AWS is not a simple solution due to the restrictions that they place on the L2 segments.  As an example, here is Amazon's suggestion for NAT HA:
http://aws.amazon.com/articles/2781451301784570
With that said, we're working on documenting a solution that will work around some of the restrictions through overlaid connections.  At a high level, one way that you can do this is with a couple of CSR1000Vs connected via a GRE tunnel over their Amazon segment.  You then would have to setup BFD and configure an EEM script to watch for a peer down event.  This script would then have to modify the AWS VPC Routing table (the VPC gateway) so that the hosts use the appropriate CSR as an exit point.  The unfortunate piece is that from the CSR1000V we cannot call the AWS API directly so this requires use of a second EEM script to SSH to a helper VM and execute the AWS VPC commands.  Hopefully within the next couple of weeks we will have a configuration guide to step through the individual components, as there are many moving parts.  At a high level this solution was presented in the Cisco Live session BRKARC-2023 around slides 35-40 (Session PDF) are some of the network diagrams and an example of the EEM script.  
With that said, another solution that you might consider is Cisco InterCloud:
http://www.cisco.com/c/en/us/td/docs/solutions/Hybrid_Cloud/InterCloud/InterCloud/Cirrus_2.html
This allows for a secure Layer 2 extension from your data center into the public cloud which could remove some complexity in dealing with the AWS infrastructure.  This solution is not one that would be for the one off, single CSR type deployment, however if you are looking at scale it could be a good alternative.  
As for TAC support with the Advanced License, this is the hourly paid model that we have within Amazon.  Support for this type of licensing is currently only offered through the support forum, however we are looking at other options that could allow direct TAC engagement on a case by case basis rather than a term license.  Depending on where you are at with regards to your deployment it may be appropriate to engage your Cisco Account Team to help determine which solution is best for you.  I can help track them down if you want to send me a private message.
-Nick