Update README.md

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@ -81,6 +81,8 @@ Bloat is below 5ms in each direction.
* Shape Clients by Access Point / Node capacity
* APs equally distributed among CPUs / NIC queues to greatly increase throughput
* Simple client management via csv file
## Considerations
* Each Node / Access Point is tied to a queue and CPU core. Access Points are evenly distributed across CPUs. Since each CPU can usually only accomodate up to 4Gbps, ensure any single Node / Access Point will not require more than 4Gbps throughput.
## Limitations
* Not dual stack, clients can only be shaped by IPv4 address for now in v0.9. Once IPv6 support is added to <a href="https://github.com/xdp-project/xdp-cpumap-tc">XDP-CPUMAP-TC</a> we can then shape IPv6 as well.
* XDP's cpumap-redirect achieves higher throughput on a server with direct access to the NIC (XDP offloading possible) vs as a VM with bridges (generic XDP).