• Thomas Gambier's avatar
    Make IPv6 on tap optionnal and put only 1 IPv6 address on the tap itself. · 40ee3280
    Thomas Gambier authored
    tap_ipv6 option let you chose if you want IPv6 on the taps or not. Some
    customers may decide to have only IPv4 inside their VMs.
    We put only 1 address on the tap itself (e.g.
    2001:67c:1254:e:89:69b0:ffff:ffff/128 instead of
    2001:67c:1254:e:89:69b0:ffff:ffff/96) otherwise, when we assign the
    address 2001:67c:1254:e:89:69b0::/96 inside the VM, the address has
    "dadfailed" status (dad = "Duplicate Address Detection"). The problem
    appears only with address "0" (ending in ::) but not with others
    addresses. We had 2 solutions:
     * put only one address on the tap (the solution we choose)
     * forbid address "0" inside the VM
    The chosen solution has the advantage that the host machine won't
    answer the ping on behalf of the VM since the tap has only 1 address
    (its own).
    /cc @alain.takoudjou
    /reviewed-on nexedi/slapos.core!86