[PVE-User] Traffic from other Servers

Daniel daniel at linux-nerd.de
Fri Nov 3 18:12:19 CET 2017


Hi,

i just have 2 VLANs and 2 LACP Trunks.

I and can see traffic on all interfaces from all Servers.. this is soooo strange and I also have packetloss. 
I think this is because of the Switches. Its after I upgraded the firmware to the latest version.

Maybe I will rollback to the last version and test if the issue will remove.


Am 03.11.17, 18:05 schrieb "pve-user im Auftrag von Silvestre Figueroa" <pve-user-bounces at pve.proxmox.com im Auftrag von silvestrefigueroa at gmail.com>:

    Hi Daniel,
    
    2017-11-03 13:31 GMT-03:00 Daniel <daniel at linux-nerd.de>:
    
    > 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.
    >
    
    
    Im using the same switches at whole network (10 devices) and no problems.
    
    VLANs, tagged and untagged, trunkings, "lacp"... works like a charm.
    
    Atte.-
    
    
    
    
    
    
    >
    >
    > 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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