Problem SLAAC IPv6 with ESXi 6.5U1

Hi,

I'm testing some configurations of SLAAC IPv6 with ESXI 6.5U1. I use radvd with Ubuntu 16.04 for generating RAs.

I would like to add prefix and/or route without setting the default gateway. From my tests, ESXi unfortunately ignores the RAs if AdvDefaultLifetime = 0. if I set AdvDefaultLifetime > 0, the prefix is correctly added but the additional route is ignored. In linux environment the net.ipv6.conf.eth0.accept_ra_rt_info_max_plen sysctl setting > 0 is required. For VMware ESXi ?

I noticed that ESXi ignores the low, medium, high preference regarding the routes. This does not allow me to have two routers in HA that allow you to manage packet routing.

This is example of my radvd.conf

interface ens33

{

AdvSendAdvert on;

AdvManagedFlag off;

AdvOtherConfigFlag off;

MinRtrAdvInterval 10;

MaxRtrAdvInterval 20;

AdvDefaultLifetime 0;

Prefix 2001:1::/64

{

AdvOnLink on;

AdvAutonomous on;

};

Route 2001:2::/64

{

AdvRouteLifetime 30;

AdvRoutePreference high;

};

};

Thank you for help, ciao

Massimo