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