With the given uptick in IPv6 deployments across the globe, need to do high speed and large scale transformation is a mandate. We all know IPv4 is not going away for all practical reasons and we need to work in mixed mode deployment structures for next couple of years. To facilitate with advance deployments NetScaler helps with providing robust transformation layer which is highly scalable and very much performance tuned.

NetScaler support this transformation in 2 modes: Vsrever-Service based and INAT based. The Vserver-Service based model is fairly known and is the core way how we do most of the stuff in NetScaler. While INAT (Inbound Network Address Translation) is a smart mechanism of doing inbound transformations without configuring Vservers and associating them with respective services. INAT supports all modes of transformation as Vserver mode supports with simple rule based mechanism. You need to configure key parameters like incoming destination IP, new destination IP. You can optionally specify a Proxy IP to be used on NetScaler and turn on/off other modes. Let us walk over different transformation modes and see the usefulness of both Vserver-Service based and INAT functionality.

IPv4-IPv4 Transformation: In this mode a public/private IPv4 address on the NetScaler appliance listens to connection requests on behalf of a private IPv4 server. This is the most common mode of NetScaler deployment.

Performance Metric Mode: Vserver-Service Mode: INAT
Configuration Limit 8K vserver 30K INAT
Proxy connections 20 Million 20 Million
Non-Proxy connections 70 Million 70 Million

IPv4-IPv6 Transformation: In this mode a public/private IPv4 address on the NetScaler appliance listens to connection requests on behalf of a private IPv6 server. This is a use case where internal deployments have moved to IPv6 addresses.

Performance Metric Mode: Vserver-Service Mode: INAT
Configuration Limit 8K vserver 30K INAT
Proxy connections 20 Million 20 Million
Non-Proxy connections 70 Million 70 Million

IPv6-IPv4 Transformation: In this mode a public/private IPv6 address on the NetScaler appliance listens to connection requests on behalf of a private IPv4 server. This is largely popular mode through which most of public facing IPv4 deployments and moving to IPv6. This also helps comply with different government/compliance/regulatory requirements.

Performance Metric Mode: Vserver-Service Mode: INAT
Configuration Limit 8K vserver 30K INAT
Proxy connections 20 Million 20 Million
Non-Proxy connections 70 Million 70 Million

IPv6-IPv6 Transformation: In this mode a public/private IPv6 address on the NetScaler appliance listens to connection requests on behalf of a private IPv6 server. This mode is used where both internal and external resources have moved to IPv6.

Performance Metric Mode: Vserver-Service Mode: INAT
Configuration Limit 8K vserver 30K INAT
Proxy connections 20 Million 20 Million
Non-Proxy connections 70 Million 70 Million

Overall NetScaler provides unmatched scalability and performance for various transformation modes. Beyond these modes NetScaler also supports mixed mode deployments where you can have IPv6/IPv4 based vserver and use combination IPv6/IPv4 based internal services. This helps organizations move their internal datacenter incrementally from IPv4 to IPv6. This is helping many cloud based deployments as well in order to have mixed mode tenant resources.