[PVE-User] Traffic from other Servers

[Ivan Malyarchuk]

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.
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> 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.
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> 
> 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
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> 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
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> My opinion is that it will be the Switch which makes wiered thinks.
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> Cheers
> 
>   
> 
> Daniel
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> 

-- 
С уважением,
Иван Малярчук
"ИНТЕР-ТЕЛЕКОМ" Цифра
Украина, Киев
(044) 206-77-33 доб.155
www.cyfra.ua