I was wondering if maybe this could have something to do with spanning tree on the bridge6 interface?
An ifconfig on the bridge6 interface shows the following spanning tree settings: priority 32768 hellotime 2 fwddelay 15 maxage 20 holdcnt 6 proto rstp Do I really need spanning tree here? and would it be safe to disable it for a test? Regards, Mabi ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐ On Friday, February 1, 2019 7:02 PM, mabi <[email protected]> wrote: > Hello, > > I am testing VMM/VMD on OpenBSD 6.4 with OpenBSD 6.4 virtual machines but > noticed that maybe around 2 times per day the VM loose their network > connectivity for a short amount of time of around 2-3 minutes. I currently > have 3 OpenBSD VM with very light load on them and it happens to all of them. > > The network connectivity recovers on its own or if I login through the > console to the VM and initiate for example a ping to the outside. The > host/hypervisor itself never looses connectivity. > > Now I presume there is either an issue with my network setup or maybe a bug > but I would rather think it has to do with my network setup. My network setup > on the OpenBSD host itself consists of two physical network devices (bnx0 + > bnx1) which I have bundled in a trunk (trunk0) in failover mode. Then on top > of my trunk I have two VLAN interfaces (vlan2 and vlan6). vlan2 is my private > network and vlan6 is my public facing network (internet). Then finally I have > a bridge interface (bridge6) with my vlan6 interface inside where my VM > connect to as they are directly available on the internet. > > So the whole chain of network interfaces from host to VM looks like this: > > [bnx0+bnx1]-[trunk0]-[vlan6]-[bridge6]-[tap0]-[vio0] > > My /etc/vm.conf looks like this: > > switch "uplink_vlan6" { > interface bridge6 > } > > vm "obsd1vm" { > memory 2G > disk "/var/vmm/obsd1vm.qcow2" > > interface { > switch "uplink_vlan6" > lladdr fe:e1:bb:03:01:01 > } > } > > My /etc/hostname.* files look like this: > > /etc/hostname.bnx0 > up > > /etc/hostname.bnx1 > up > > /etc/hostname.trunk0 > trunkproto failover trunkport bnx0 trunkport bnx1 up > > /etc/hostname.vlan2 > inet 192.168.1.56 255.255.255.0 192.168.1.255 vnetid 2 parent trunk0 > description "private" up > > /etc/hostname.vlan6 > inet xxx.xxx.xxx.xxx 255.255.255.0 xxx.xxx.xxx.255 vnetid 6 parent trunk0 > description "public" up > > /etc/hostname.bridge6 > add vlan6 > up > > The hardware switch behind the host is a Cisco switch and the two ports > connected to the two hardware NICS of the server have both the following > config: > > interface Eth101/1/9 > switchport mode trunk > switchport trunk native vlan 99 > switchport trunk allowed vlan 2,6 > > Finally below is the output of ifconfig: > > bnx0: flags=8b43<UP,BROADCAST,RUNNING,PROMISC,ALLMULTI,SIMPLEX,MULTICAST> mtu > 1500 > > lladdr ---REMOVED--- > index 3 priority 0 llprio 3 > trunk: trunkdev trunk0 > media: Ethernet autoselect (1000baseT full-duplex,rxpause) > status: active > > > bnx1: flags=8b43<UP,BROADCAST,RUNNING,PROMISC,ALLMULTI,SIMPLEX,MULTICAST> mtu > 1500 > > lladdr ---REMOVED--- > index 4 priority 0 llprio 3 > trunk: trunkdev trunk0 > media: Ethernet autoselect (1000baseT full-duplex,rxpause) > status: active > > > bridge6: flags=41<UP,RUNNING> > > description: switch1-uplink_vlan6 > index 5 llprio 3 > groups: bridge > priority 32768 hellotime 2 fwddelay 15 maxage 20 holdcnt 6 proto rstp > vlan6 flags=3<LEARNING,DISCOVER> > > port 8 ifpriority 0 ifcost 0 > tap0 flags=3<LEARNING,DISCOVER> > > port 10 ifpriority 0 ifcost 0 > > > trunk0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500 > > lladdr ---REMOVED--- > index 6 priority 0 llprio 3 > trunk: trunkproto failover > trunkport bnx1 > trunkport bnx0 master,active > groups: trunk > media: Ethernet autoselect > status: active > > > vlan2: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500 > > lladdr ---REMOVED--- > description: private > index 7 priority 0 llprio 3 > encap: vnetid 2 parent trunk0 > groups: vlan egress > media: Ethernet autoselect > status: active > inet 192.168.1.56 netmask 0xffffff00 broadcast 192.168.1.255 > > > vlan6: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500 > > lladdr ---REMOVED--- > description: public > index 8 priority 0 llprio 3 > encap: vnetid 6 parent trunk0 > groups: vlan > media: Ethernet autoselect > status: active > inet ---REMOVED--- netmask 0xffffff00 broadcast ---REMOVED--- > > > pflog0: flags=141<UP,RUNNING,PROMISC> mtu 33136 > > index 9 priority 0 llprio 3 > groups: pflog > > > tap0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500 > > lladdr fe:e1:ba:d0:56:1c > description: vm1-if0-obsd1vm > index 10 priority 0 llprio 3 > groups: tap > status: active > > > Last note, the host and VMs are all patched up to 013_unveil. > > I hope I could provide here all the relevant details, if there is anything > else I should add I would be happy to provide with more info. > > Best regards, > Mabi
