[PVE-User] Traffic from other Servers

Daniel daniel at linux-nerd.de
Fri Nov 3 17:31:08 CET 2017


Hi,

yes the MAC is learned and i can see that mac. So this seems not the problem
Maybe someone has another idea. We use HP-1920 48 Port Switch.


Am 03.11.17, 11:45 schrieb "pve-user im Auftrag von Ivan Malyarchuk" <pve-user-bounces at pve.proxmox.com im Auftrag von malyarchuk at cyfra.ua>:

    Hello.
    Looks like your switch is flooding known unicast traffic.
    Check if mac of 10.0.2.7 exists in FDB on all switches, also 
    mac-learning is enabled on this port or vlan, and check overall MAC 
    count on switch.
    Also there is a chance of hash collision, which leads to things thet 
    some mac addresses cant be learned on switch FDB.
    
    03.11.2017 11:20, Daniel пишет:
    > Hi there,
    > 
    >   
    > 
    > i have some strange issues. I have a couple of Proxmox Server in a Cluster.
    > 
    > First of all I see on all Servers the same Traffic. This confused me and I started to debug where it come from.
    > 
    >   
    > 
    > First point was tcpdump and here is something strange. I see on server7 all traffic which is going to the NFS Server from server18
    > 
    > Normally in a switched network this is not possible for my understanding.
    > 
    >   
    > 
    > 10:09:29.686286 IP 10.0.2.128.782 > 10.0.2.7.2049: Flags [.], seq 22820576:22848088, ack 67363421, win 24575, options [nop,nop,TS val 552550304 ecr 1340486158], length 27512
    > 
    > 10:09:29.686519 IP 10.0.2.128.782 > 10.0.2.7.2049: Flags [.], seq 22848088:22850984, ack 67363421, win 24575, options [nop,nop,TS val 552550304 ecr 1340486158], length 2896
    > 
    > 10:09:29.686527 IP 10.0.2.128.782 > 10.0.2.7.2049: Flags [.], seq 22850984:22877048, ack 67363421, win 24576, options [nop,nop,TS val 552550304 ecr 1340486158], length 26064
    > 
    > 10:09:29.686774 IP 10.0.2.128.782 > 10.0.2.7.2049: Flags [.], seq 22877048:22906008, ack 67363421, win 24576, options [nop,nop,TS val 552550304 ecr 1340486158], length 28960
    > 
    > 10:09:29.687010 IP 10.0.2.128.782 > 10.0.2.7.2049: Flags [P.], seq 22906008:22912924, ack 67363421, win 24576, options [nop,nop,TS val 552550304 ecr 1340486158], length 6916
    > 
    >   
    > 
    > I have to possibilities. My HP Switch is doing this with maybe mirror ports (but not configured as I know)
    > 
    > The Proxmox Cluster show traffic on all Hosts. All my Hosts has the same Traffic Account when I check the Graphs
    > 
    >   
    > 
    > My opinion is that it will be the Switch which makes wiered thinks.
    > 
    >   
    > 
    > Cheers
    > 
    >   
    > 
    > Daniel
    > 
    >   
    > 
    >   
    > 
    >   
    > 
    >   
    > 
    >   
    > 
    > _______________________________________________
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    -- 
    С уважением,
    Иван Малярчук
    "ИНТЕР-ТЕЛЕКОМ" Цифра
    Украина, Киев
    (044) 206-77-33 доб.155
    www.cyfra.ua
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