[PVE-User] Traffic from other Servers

Silvestre Figueroa silvestrefigueroa at gmail.com
Fri Nov 3 18:05:16 CET 2017


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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>
>
>
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