On Wed, 2017-05-10 at 13:30 +0800, Yalan Zhang wrote: > I'm sorry that I missed the mail. 没关系 > But currently I can not reproduce it. > For the error by net-create, it is executed when I set accept_ra to 1. That sounds more normal. net-create and net-start are triggering the same code in the end. > I have just test on libvirt-3.2.0-4.el7.x86_64, the behavior changes, it seems like there is no check for accept_ra > before start a network with ipv6. > > 1. define and start a network with ipv6 settings > # virsh net-dumpxml default6 > <network> > <name>default6</name> > <uuid>c502d02c-fbd0-49d9-91e4-0fcf0ef159d0</uuid> > <forward mode='nat'/> > <bridge name='virbr4' stp='on' delay='0'/> > <mac address='52:54:00:04:d5:3c'/> > <ip address='192.168.10.1' netmask='255.255.255.0'> > <dhcp> > <range start='192.168.10.2' end='192.168.10.254'/> > </dhcp> > </ip> > <ip family='ipv6' address='2001:db8:ca2:2::1' prefix='64'> > <dhcp> > <range start='2001:db8:ca2:2:1::10' end='2001:db8:ca2:2:1::ff'/> > </dhcp> > </ip> > </network> > > # cat /proc/sys/net/ipv6/conf/enp0s25/accept_ra > 1 > > # virsh net-start default6 =====> the network can start as well with accept_ra=1 > Network default6 started > > It seems that the "virNetDevIPGetAcceptRA()" in patch "network: check accept_ra before enabling ipv6 forwarding" > with commit 00d28a78 is not executed when I start a network. Please help to check, Thank you. It won't complain at all if there is no RA route set on the host. To reproduce, you need to setup a machine acting as an ipv6 router with radvd on the guest network. Do you actually have an RA route for the enp0s25 device? You can check it by running `ip -6 r`. These routes are indicated with 'proto ra' -- Cedric -- libvir-list mailing list libvir-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvir-list
