Hi,

i've just tried to update my sandboxing environmnent after long time without update (i know it's bad...) and i'm facing a problem with multiple gateway.
This environment work with 6 hypervisors (centos 8) and one manager on dedicated server, all this baremetal have 2 interface in 2 différent network protected by firewall.
All my hypervisords have 2 network for ovirt, one "ovirtmgmt" for management (only SSH and internal admin stuff), the other "ovir_prod" for console, migration, and default gateway.

I've 3 hypervisors non updated which i can ping /ssh / ... (according to iptables) on the two interface without problem.
But the 3 hypervisors just updated are accessible only on the "ovirt_prod" interface. I'm looking inside ip route/ ip rules it seems to miss something.
I always configured my HV by ovirt gui so i does not understand what going wrong.

This is ip route/ip rules of my hv, it's like missing ip rules on non working HV
The "route-ovirt_prod" file that does not exist on old HV.

Working HV (centos 8.3 / vdsm 4.20.26.3-1) :
    [root@drogo ~]# ip ru
    0:  from all lookup local
    32000:      from 10.100.126.0/24 lookup 174358038
    32000:      from all to 10.100.126.0/24 iif ovirtmgmt lookup 174358038
    32000:      from 10.5.7.0/24 lookup 168101654
    32000:      from all to 10.5.7.0/24 iif comte_prod lookup 168101654
    32766:      from all lookup main
    32767:      from all lookup default

    [root@drogo ~]# ip rou
    default via 10.5.7.254 dev comte_prod proto static metric 425
    10.5.7.0/24 dev comte_prod proto kernel scope link src 10.5.7.22 metric 425
    10.100.126.0/24 dev ovirtmgmt proto kernel scope link src 10.100.126.22 metric 426

Bugged HV (centos 8.4/ vdsm 4.40.70.6-1)
    [root@balbo ~]# ip ru
    0:  from all lookup local
    32766:      from all lookup main
    32767:      from all lookup default

    [root@balbo ~]# ip rou
    default via 10.5.7.254 dev comte_prod proto static metric 425
    10.5.6.0/26 dev enp4s0f1 proto kernel scope link src 10.5.6.6 metric 100 linkdown
    10.5.7.0/24 dev comte_prod proto kernel scope link src 10.5.7.25 metric 426
    10.100.126.0/24 dev ovirtmgmt proto kernel scope link src 10.100.126.25 metric 425

    [root@bingo network-scripts]# cat route-ovirt_prod
    ADDRESS0=0.0.0.0
    NETMASK0=0.0.0.0
    GATEWAY0=10.5.7.254
    OPTIONS0="table 254"
    METRIC0=431



Than you for help :)

--
Lionel Caignec
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