A couple of links I found helpful, thought I'd send them over http://therandomsecurityguy.com/openvswitch-cheat-sheet/ https://ovirt.org/develop/release-management/features/network/openvswitch/native-openvswitch.html
With STP off, if the network is detecting a loop then it will have to block a link. With STP on I guess it's allowing the network to remain forwarding and the blocking to occur elsewhere. 👍 Tony Pearce On Tue, 20 Aug 2019 at 10:12, Curtis E. Combs Jr. <ej.alb...@gmail.com> wrote: > > Cool, I can capture some packets tomorrow when I'm in the office and > see how that compares... > > But, yea, it's a hassle to get them to respond IF they do, so the only > real options I'm going to have are what I can do with my servers from the OS. > No > physical access. No nice DC guy to help me out. > > > On Mon, Aug 19, 2019 at 10:06 PM Tony Pearce <tony...@gmail.com> wrote: > > > > :) They might be using Cisco's per-vlan spanning tree on the network > > side. It is possible to capture the packets coming in from the network > > and confirm that. > > > > Attached screenshot of wireshark for you for reference. > > > > Glad you're all working :) > > > > Regards > > > > Tony Pearce > > > > > > > > On Tue, 20 Aug 2019 at 09:52, Curtis E. Combs Jr. <ej.alb...@gmail.com> > > wrote: > > > > > > Hey Tony! > > > > > > I only know the basics of Spanning Tree. At the current moment the > > > only way to get migrations to work at all without breaking the whole > > > oVirt cluster is to have it on. After changing it according to Paul's > > > instruction, it works like it has never worked before. Every migration > > > event was successful. Whereas before and even at times with the > > > cronjob (when vdsm set STP to off between cron runs) the link would > > > drop out and oVirt would say that the host was "unresponsive". > > > > > > It would be too - it wouldn't respond to SSH, ping, arp > > > requests...nothing. I never got a good idea of how long this would be > > > for, but it would, eventually go away and the link would come back > > > online. > > > > > > I have no access to the hardware. From using tcpdump to get some CDP > > > packets, I do know that it's Cisco switches but the IT team here is > > > completely unresponsive (they literally ignore our tickets) and the > > > co-lo where our servers are hosted won't even pick up the phone for > > > anyone but them.... > > > > > > Unfortunately, this is what I'm going to have to do. The cluster is > > > very functional, though. I created around 15 VMs today and > > > migrated them from host to host without any problem. > > > > > > Anything else you'd like me to try? This is currently dev, so I can > > > really do anything I want and I can just IPMI reboot the nodes if it > > > causes issues... > > > > > > Thanks! > > > cecjr > > > > > > > > > On Mon, Aug 19, 2019 at 9:37 PM Tony Pearce <tony...@gmail.com> wrote: > > > > > > > > e.albany, > > > > > > > > STP is meant to block loops in layer 2. In basic operation, a root > > > > bridge is elected which is the root of the tree. This bridge sends, > > > > essentially 'hello' messages as multicast packets. The switches then > > > > detect the loop in the network and block one of the links to prevent > > > > such things as a broadcast storm. > > > > > > > > There are different flavours of STP but "STP" usually means the hellos > > > > are sent over VLAN 1 (or no vlan). Therefore if you have multiple > > > > VLANs on links, the hellos are still only sent over VLAN 1 and all > > > > VLANs are dealt with that way. Meaning if a link is blocked then all > > > > VLANs are blocked on that link, > > > > > > > > Then came the different flavours, one of which is per-vlan STP. This > > > > allows individual VLANs to be blocked and gives more flexibility. > > > > > > > > After STP has dealt with the blocking, this link blocking will > > > > continue until a change in the network is detected. This is detected > > > > by the absence of the STP packets or the presence of new STP packets > > > > where there shouldnt be. When this happens, STP packets are flooded > > > > everywhere to discover the new network topology. Ultimately, the loop > > > > will be blocked again. > > > > > > > > I think that you have two STP versions running in your network and > > > > it's causing the issue. An easy test would be to remove the loop > > > > manually in the network and leave STP off on the ovirt host. You can > > > > view the topology as-per the network STP devices by obtaining info > > > > from the devices such as bridge priorities etc. What is your network > > > > hardware? > > > > > > > > Regards, > > > > > > > > Tony > > > > > > > > > > > > On Tue, 20 Aug 2019 at 08:22, Staniforth, Paul > > > > <p.stanifo...@leedsbeckett.ac.uk> wrote: > > > > > > > > > > I haven't used FC with oVirt but in the following it shows the bridge > > > > > options available and how to enable Ethtool and FCoE. > > > > > > > > > > https://ovirt.org/documentation/admin-guide/appe-Custom_Network_Properties.html > > > > > > > > > > > > > > > Regards, > > > > > Paul S. > > > > > > > > > > ________________________________________ > > > > > From: ej.alb...@gmail.com <ej.alb...@gmail.com> > > > > > Sent: 17 August 2019 10:25 > > > > > To: users@ovirt.org > > > > > Subject: [ovirt-users] Need to enable STP on ovirt bridges > > > > > > > > > > Hello. I have been trying to figure out an issue for a very long time. > > > > > That issue relates to the ethernet and 10gb fc links that I have on my > > > > > cluster being disabled any time a migration occurs. > > > > > > > > > > I believe this is because I need to have STP turned on in order to > > > > > participate with the switch. However, there does not seem to be any > > > > > way to tell oVirt to stop turning it off! Very frustrating. > > > > > > > > > > After entering a cronjob that enables stp on all bridges every 1 > > > > > minute, the migration issue disappears.... > > > > > > > > > > Is there any way at all to do without this cronjob and set STP to be > > > > > ON without having to resort to such a silly solution? > > > > > > > > > > Here are some details about my systems, if you need it. > > > > > > > > > > > > > > > selinux is disabled. > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > [root@swm-02 ~]# rpm -qa | grep ovirt > > > > > ovirt-imageio-common-1.5.1-0.el7.x86_64 > > > > > ovirt-release43-4.3.5.2-1.el7.noarch > > > > > ovirt-imageio-daemon-1.5.1-0.el7.noarch > > > > > ovirt-vmconsole-host-1.0.7-2.el7.noarch > > > > > ovirt-hosted-engine-setup-2.3.11-1.el7.noarch > > > > > ovirt-ansible-hosted-engine-setup-1.0.26-1.el7.noarch > > > > > python2-ovirt-host-deploy-1.8.0-1.el7.noarch > > > > > ovirt-ansible-engine-setup-1.1.9-1.el7.noarch > > > > > python2-ovirt-setup-lib-1.2.0-1.el7.noarch > > > > > cockpit-machines-ovirt-195.1-1.el7.noarch > > > > > ovirt-hosted-engine-ha-2.3.3-1.el7.noarch > > > > > ovirt-vmconsole-1.0.7-2.el7.noarch > > > > > cockpit-ovirt-dashboard-0.13.5-1.el7.noarch > > > > > ovirt-provider-ovn-driver-1.2.22-1.el7.noarch > > > > > ovirt-host-deploy-common-1.8.0-1.el7.noarch > > > > > ovirt-host-4.3.4-1.el7.x86_64 > > > > > python-ovirt-engine-sdk4-4.3.2-2.el7.x86_64 > > > > > ovirt-host-dependencies-4.3.4-1.el7.x86_64 > > > > > ovirt-ansible-repositories-1.1.5-1.el7.noarch > > > > > [root@swm-02 ~]# cat /etc/redhat-release > > > > > CentOS Linux release 7.6.1810 (Core) > > > > > [root@swm-02 ~]# uname -r > > > > > 3.10.0-957.27.2.el7.x86_64 > > > > > You have new mail in /var/spool/mail/root > > > > > [root@swm-02 ~]# ip a > > > > > 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN > > > > > group default qlen 1000 > > > > > link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 > > > > > inet 127.0.0.1/8 scope host lo > > > > > valid_lft forever preferred_lft forever > > > > > 2: em1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq master > > > > > test state UP group default qlen 1000 > > > > > link/ether d4:ae:52:8d:50:48 brd ff:ff:ff:ff:ff:ff > > > > > 3: em2: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group > > > > > default qlen 1000 > > > > > link/ether d4:ae:52:8d:50:49 brd ff:ff:ff:ff:ff:ff > > > > > 4: p1p1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq master > > > > > ovirtmgmt state UP group default qlen 1000 > > > > > link/ether 90:e2:ba:1e:14:80 brd ff:ff:ff:ff:ff:ff > > > > > 5: p1p2: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group > > > > > default qlen 1000 > > > > > link/ether 90:e2:ba:1e:14:81 brd ff:ff:ff:ff:ff:ff > > > > > 6: ovs-system: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN > > > > > group default qlen 1000 > > > > > link/ether a2:b8:d6:e8:b3:d8 brd ff:ff:ff:ff:ff:ff > > > > > 7: br-int: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group > > > > > default qlen 1000 > > > > > link/ether 96:a0:c1:4a:45:4b brd ff:ff:ff:ff:ff:ff > > > > > 25: test: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue > > > > > state UP group default qlen 1000 > > > > > link/ether d4:ae:52:8d:50:48 brd ff:ff:ff:ff:ff:ff > > > > > inet 10.15.11.21/24 brd 10.15.11.255 scope global test > > > > > valid_lft forever preferred_lft forever > > > > > 26: ovirtmgmt: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc > > > > > noqueue state UP group default qlen 1000 > > > > > link/ether 90:e2:ba:1e:14:80 brd ff:ff:ff:ff:ff:ff > > > > > inet 10.15.28.31/24 brd 10.15.28.255 scope global ovirtmgmt > > > > > valid_lft forever preferred_lft forever > > > > > 27: ;vdsmdummy;: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN > > > > > group default qlen 1000 > > > > > link/ether 62:e5:e5:07:99:eb brd ff:ff:ff:ff:ff:ff > > > > > 29: vnet0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq master > > > > > ovirtmgmt state UNKNOWN group default qlen 1000 > > > > > link/ether fe:6f:9c:95:00:02 brd ff:ff:ff:ff:ff:ff > > > > > [root@swm-02 ~]# free -m > > > > > total used free shared buff/cache > > > > > available > > > > > Mem: 64413 1873 61804 9 735 > > > > > 62062 > > > > > Swap: 16383 0 16383 > > > > > [root@swm-02 ~]# free -h > > > > > total used free shared buff/cache > > > > > available > > > > > Mem: 62G 1.8G 60G 9.5M 735M > > > > > 60G > > > > > Swap: 15G 0B 15G > > > > > [root@swm-02 ~]# ls > > > > > ls lsb_release lshw lslocks > > > > > lsmod lspci lssubsys > > > > > lsusb.py > > > > > lsattr lscgroup lsinitrd lslogins > > > > > lsns lss16toppm lstopo-no-graphics > > > > > lsblk lscpu lsipc lsmem > > > > > lsof lsscsi lsusb > > > > > [root@swm-02 ~]# lscpu > > > > > Architecture: x86_64 > > > > > CPU op-mode(s): 32-bit, 64-bit > > > > > Byte Order: Little Endian > > > > > CPU(s): 16 > > > > > On-line CPU(s) list: 0-15 > > > > > Thread(s) per core: 2 > > > > > Core(s) per socket: 4 > > > > > Socket(s): 2 > > > > > NUMA node(s): 2 > > > > > Vendor ID: GenuineIntel > > > > > CPU family: 6 > > > > > Model: 44 > > > > > Model name: Intel(R) Xeon(R) CPU X5672 @ 3.20GHz > > > > > Stepping: 2 > > > > > CPU MHz: 3192.064 > > > > > BogoMIPS: 6384.12 > > > > > Virtualization: VT-x > > > > > L1d cache: 32K > > > > > L1i cache: 32K > > > > > L2 cache: 256K > > > > > L3 cache: 12288K > > > > > NUMA node0 CPU(s): 0,2,4,6,8,10,12,14 > > > > > NUMA node1 CPU(s): 1,3,5,7,9,11,13,15 > > > > > Flags: fpu vme de pse tsc msr pae mce cx8 apic sep > > > > > mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht > > > > > tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts > > > > > rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq > > > > > dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm pcid dca > > > > > sse4_1 sse4_2 popcnt aes lahf_lm ssbd ibrs ibpb stibp tpr_shadow vnmi > > > > > flexpriority ept vpid dtherm ida arat spec_ctrl intel_stibp flush_l1d > > > > > [root@swm-02 ~]# > > > > > _______________________________________________ > > > > > Users mailing list -- users@ovirt.org > > > > > To unsubscribe send an email to users-le...@ovirt.org > > > > > Privacy Statement: > > > > > https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ovirt.org%2Fsite%2Fprivacy-policy%2F&data=02%7C01%7Cp.staniforth%40leedsbeckett.ac.uk%7C7ab353289f94464c449c08d722f54d79%7Cd79a81124fbe417aa112cd0fb490d85c%7C0%7C0%7C637016309280142189&sdata=0wb89Tzd6ZUnefnPWE9WypV38zi%2BKar6HSGT93W0Ohc%3D&reserved=0 > > > > > oVirt Code of Conduct: > > > > > 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