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    Network interfaces UP but no traffic

    Posted on

    Hi,

    we have a Red Hat 8.5.0-10 with 4 network interfaces:

    ens1f0         network        I350 Gigabit Network Connection
ens1f1         network        I350 Gigabit Network Connection
ens7f0         network        Ethernet Controller X710 for 10GbE SFP+
ens7f1         network        Ethernet Controller X710 for 10GbE SFP+

    But only configured with network-scripts one of each model:

    ens1f0: flags=4163  mtu 1500
        inet 192.168.84.16  netmask 255.255.255.0  broadcast 192.168.84.255
        inet6 fe80::b696:91ff:fedb:40b0  prefixlen 64  scopeid 0x20
        ether b4:96:91:db:40:b0  txqueuelen 1000  (Ethernet)
        RX packets 159079  bytes 42415919 (40.4 MiB)
        RX errors 0  dropped 102117  overruns 0  frame 0
        TX packets 3652  bytes 364692 (356.1 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
        device memory 0xe3c00000-e3cfffff

ens7f0: flags=4099  mtu 1500
        inet 192.168.84.15  netmask 255.255.255.0  broadcast 192.168.84.255
        ether 68:05:ca:f7:76:0c  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0


    ens7f0
    is UP but not RUNNING, but I can make ping to both IP addresses although there is no traffic on the 10GbE, and if I unplugged the cable on the Gigabit, I cannot ping any of them.

    I guess something in the server is routing from IP 84.15 to 84.16, but I do not how.

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