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...
