4:37 a.m.
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.Staniforth(a)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_Propertie...
>
>
> Regards,
> Paul S.
>
> ________________________________________
> From: ej.albany(a)gmail.com <ej.albany(a)gmail.com>
> Sent: 17 August 2019 10:25
> To: users(a)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 ~]#
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