IPv6 Overview


There are a number of ways an Enterprise can deploy IPv6 within in their organization, the three main types are as follows; the brief list below, highlights the three types.



·         Dual Stack Mode (DSM) – End-to-end dual stack network

·         Hybrid Model-Intra-Site Automatic Tunnel Addressing Protocol (ISATAP) and dual-stack

·         Service Based Model (SBM) Combination of ISATAP, manually-configured tunnels and dual-stack




DSM is completely based on the dual-stack transition mechanism. A device or network on which two protocol stacks have been enabled at the same time operates in dual-stack mode.

This means on routers, L3 switches, Firewalls etc. can have an IPv4 and an IPv6 address co-existing on the same interface.

Dual-stack is the preferred, most versatile way to deploy IPv6 in existing IPv4 environments. IPv6 can be enabled wherever IPv4 is enabled along with the associated features required to make IPv6 routable, highly available, and secure.

In some cases, IPv6 is not enabled on a specific interface or device because of the presence of legacy applications or hosts for which IPv6 is not supported. Inversely, IPv6 may be enabled on interfaces and devices for which IPv4 support is no longer needed.

This can provide flexibility, by allowing interfaces on devices to have one IPv6 or one IPv4 address, depending on the device’s capability.

Because of the high data rate, link speeds and capacity in the IISS Data Center and keeping performance issues like latency to a minimum.

Enabling IPv6 on software forwarding-only Enterprise switching platforms may be suitable in a test environment or small pilot network, but certainly not in a production campus network.

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