What I can observe is that:
- Neighbor sollicitations between the host and the CentOS VMs are being exchanged regularly
- With the Debian guest:
- Neighbor sollicitations are exchanged when the VM is rebooted
- Afterwards they are not exchanged...
- ... unless one explicitly pings the guest from the host on this internal ULA address
(then, one can see the echo packets, but also some routerneighbor sollicitations)
iface br0 inet6 static
bridge_ports enp1s0f0
address 2001:XXXX:XXXX:XXXX::/56
iface enp1s0 inet6 static
address 2001:YYYY:YYYY:YYYY:YYYY:YYYY:YYYY:YYYY/64
post-up ip route add YYYY:YYYY:YYYY:YYYY:YYYY:YYYY:YYYY:ff dev enp1s0
post-up ip route add 2000::/3 via 2001:YYYY:YYYY:YYYY:YYYY:YYYY:YYYY:ff dev enp1s0
pre-down ip route del 2001:YYYY:YYYY:YYYY:YYYY:YYYY:YYYY:ff dev enp1s0
pre-down ip route del 2000::/3 via 2001:YYYY:YYYY:YYYY:YYYY:YYYY:YYYY:ff dev enp1s0
- Neighbor sollicitations between the host and the CentOS VMs are being exchanged regularly
- With the Debian guest:
- Neighbor sollicitations are exchanged when the VM is rebooted
- Afterwards they are not exchanged...
- ... unless one explicitly pings the guest from the host on this internal ULA address
(then, one can see the echo packets, but also some routerneighbor sollicitations)
You need periodic router advertisements to refresh prefix infos. How
are you generating those?
iface br0 inet6 static
bridge_ports enp1s0f0
address 2001:XXXX:XXXX:XXXX::/56
You should always use /64 on an ipv6 network.
iface enp1s0 inet6 static
address 2001:YYYY:YYYY:YYYY:YYYY:YYYY:YYYY:YYYY/64
post-up ip route add YYYY:YYYY:YYYY:YYYY:YYYY:YYYY:YYYY:ff dev enp1s0
post-up ip route add 2000::/3 via 2001:YYYY:YYYY:YYYY:YYYY:YYYY:YYYY:ff dev enp1s0
pre-down ip route del 2001:YYYY:YYYY:YYYY:YYYY:YYYY:YYYY:ff dev enp1s0
pre-down ip route del 2000::/3 via 2001:YYYY:YYYY:YYYY:YYYY:YYYY:YYYY:ff dev enp1s0
This does not match your description. Please don't change ip addresses
if you are searching for problems.
"Mathieu" == Mathieu Baudier <mbaudier@argeo.org> writes:
This sounds like multicast packets aren't getting through the bridge.
Check the values of /sys/class/net/$IFACE/bridge/multicast_querier and /sys/class/net/$IFACE/bridge/multicast_snooping
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