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6500 switch acting as a hub

We have 6500 switch running IOS s72033-adventerprisek9_wan-mz.122-18.SXF3.bin

Many servers are connected to this switch. When i use wireshark to sniff traffic on our

windows DFS server connected to this switch, i see traffic for entire VLAN on wireshark. I

am not suppose to see traffic between other hosts/server since this server port is not

configured as a span port. It seems like 6500 switch is acting as a hub . There is no span

session configured on this switch. Our system admins have been complaining about

performance issue on their servers. I used wireshark on different servers on that switch

and i see same result. All the servers connected to this switch is seeing traffic for

entire vlan regardless of ports. I even connected my laptop to this switch and i can see

traffic for entire vlan.

1 REPLY
Bronze

Re: 6500 switch acting as a hub

Hi there,

I'm pretty sure that when the MAC table fills up, the switch then acts like a hub, or more precisely it unicast floods.

This may or may not help (but I hope it does): http://www.cisco.com/en/US/products/hw/switches/ps708/products_tech_note09186a00807347ab.shtml

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