On 04/10/2014, at 2:31 AM, Dan Williams wrote:
> On Fri, 2014-10-03 at 11:36 -0400, Chuck Anderson wrote:
>> I'm not sure if this is a kernel thing or a NetworkManager thing. Did
>> something change in how IPv6 router advertisements are handled by
>> NetworkManager in Fedora 20?
>
> I think it's a NetworkManager thing. We'll fix it.
Hi Dan,
I've had a lot of trouble in IPv4 with DHCP in hotel systems setting the MTU to
less than the 576 minimum (and sometimes less than the size of the IPv4
header). I believe that this was a misguided effort to implement fair queuing.
It might be worthwhile anticipating such issues for IPv6, roughly:
/* IPv6 minimum link MTU specified on page 24 of RFC 2460. */
#define IPV6_MINIMUM_MTU 1280
unsigned int enforce_link_mtu_bounds(unsigned int offered_link_mtu,
char *interface_name)
{
if (offered_link_mtu < IPV6_MINIMUM_MTU) {
syslog("Offered link MTU for %s is %u, increased to " IPV6_MINIMUM_MTU "\n",
(interface_name) ? interface_name : "an interface",
offered_link_mtu);
return IPV6_MINIMUM_MTU;
}
return offered_link_mtu;
}
-glen
_______________________________________________
networkmanager-list mailing list
[email protected]
https://mail.gnome.org/mailman/listinfo/networkmanager-list
