[Oisf-users] Anybody using VLAN RSPAN ?

Duarte Silva duarte.silva at serializing.me
Thu May 9 13:28:33 UTC 2013


one of the problems with port mirroring (SPAN) is that you're allways limited 
by the speed of the port to where you're copying the traffic too. For example, 
if you're mirroring 4 ports that in total are handling 3,5 Gbps of traffic and 
copying that traffic to a 1 Gbps port, you will observe packet loss (2,5 Gbps of 

The port to where the traffic is copied allways needs to be able to handle all 
the traffic of all the other ports together. Note that the Suricata server also 
needs to have a network card that is able to handle those loads.

Best regards,
Duarte Silva

On Thursday 09 May 2013 15:10:32 Travel Factory S.r.l. wrote:
> We are using VLAN RSPAN to mirror traffic but we are having packets
> drop on the switches (not on suricata server) and can't understand
> why.
> So I'm looking for somebody that succesfully uses VLAN RSPAN to know
> which traffic load he can achieve.
> Thanks
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