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New Member

Cisco SGE2010 flooding data to all ports

We have got problems with one of our Cisco SGE2010p 48-port Gigabit Switch. If one host sends data, it will be replicated (and can be sniffed) on every single port. If we have heavy traffic on the device (for example backup) then other services maybe fail to response. Timeouts occur and the network is slow so nobody can work.

I read about unicast flooding and other things, i haven't found any solution for us.

On the switch configuration I checked the menu "Bridging / Adresstable / Dynamic" for MAC Addresses learned by the switch.

There are three, sometimes four entries. But they don't last. _Everytime_ i refresh the list there are other entries. Maybe there is the problem.. is it possible that the switch cannot learn MAC and is flooding because of this data to every port? If yes.. how can we stop this behavious?

Entries look like this:

VLAN ID     MAC     Interface

VLAN 1     0010182477f7     g33

VLAN 1     00262d011461     g7

VLAN 1     004035bae590     g3

VLAN 1     18a90553db74     g12

VLAN 1     58946b41b2a0     g10

after a refresh:

VLAN ID     MAC     Interface

VLAN 1     0010182477f7     g33

VLAN 1     00262d011461     g7

VLAN 1     004035bae590     g3

It's a small environment with some computers, some printers and a VMware ESXi-Host with some virtual machines, everyone on a own RJ45 port. The is an upling switch (a cisco too) for another stage for another 3 computers and one printer. Maybe the switch is defective? Have no second device to test ...

Any help is very welcome...

  • LAN Switching and Routing
1 REPLY
New Member

After countless hours I

After countless hours I finally found a "solution". I upgraded the firmware and reset the device and the problem went away. I never found any other way or "option" to stop this kind of port flooding. Maybe this answer will help someone else.

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