What do mean and what are you trying to accomplish. Anyway the answer is no you cannot make it like a hub. If you are just trying to make it like 10 meg half duplex then you just hardcode the speed for that.
What i'm trying to acomplish is to make 3 ports, from a switch to work as a hub, that is repeat everything between them.
Is this possible?
If you do not configure any specify features at these 3 ports, it should normally act as a hub or create a VLAN for these 3 ports. The differene is all three ports have dedicated BW. Could you elaborate more on what application will running on these ports ?
Yes this does help as meantioned.
Use the span fucntion but if you really doesn't want too I have a few tricks up my sleeve.
1. Try to force the mac-adress table to have a size of 0. That way it won't learn any mac-adresses. Packet with unknown mac-adresses are flooded.
2. Same trick otherways around. Use a hacker tool to send a lot of packets with random mac-addresses. That way you will fill the mac-address table to the max. Other packets will then be floodded.
3. Give both systems (out side the IDS) a multicast-mac adress. When multicats is not implemented in you network this will again flood traffic to all ports in the same vlan. (not only that switch)
All these options are not really good networking practise but hey if you want other options than span
If you can or doesn't want to use span you can.
1. Put a hub in front
2. Use a tap
3. put the IDS in-line
* Please rate my post
If I am assessing your issue correctly you are running into the problem that a local span port can only have one Destination and you need the traffic mirrored to multiple ports at once. So you are hoping to make a switch into a Hub to achieve this.
If that is the case I would recommend setting up RSPAN. RSPAN allows multiple Destination ports to all see the same traffic.
It may be also possible that you could just play with the Remote-Span vlan command because what that command basically does is forward all traffic in the vlan to all members of the vlan regardless of CAM table which is eventually what the difference is between a hub and a switch.
Good luck. If you come up with a working config please post it.
I think the feature you are looking for is SPAN.
(Switch Port Analyzer).
here is a sample config:
C2950(config)#monitor session 1 source interface fastethernet 0/2
!--- This configures interface Fast Ethernet 0/2 as source port.
C2950(config)#monitor session 1 destination interface fastethernet 0/3
!--- This configures interface Fast Ethernet 0/3 as destination port.
C2950#show monitor session 1
RX Only: None
TX Only: None
Destination Ports: Fa0/3
You can get all the information you need here
PS: Please rate my posts
Ok! I already known about span. I tought there was another option that could put some switch ports in hub alike ports.
Thanks you all
OK!!! If you already know about SPAN then i would asume that you are a CCNP at least... If that is the case then i also assume that you have THE basic knowlodge of the architectural dirffernces between switches and 'hubs'.
Given all the above then you know that switch ports do not, and cannot act like switch ports under any circumstances... except when SPAN is used.
Switch ports do not forward unicast traffic to all ports - only the port to which the destination MAC address is assigned. Hubs forward unicast traffic to all ports as 'HUBs' do not have a MAC addres Table.
Do not ask silly questions, and then give a silly response to someone that helps.
PS. Just a bit annoyed at the arrogance that can be in the Cisco forums sometimes.