Hub

i have a 19 port Hub + upload and i have the hub hooked up from my router and when i hook the router to the upload the last light right next to upload lights up (because it is shared with upload) but the light above upload there is a red light flashing and above it there is 100. i don't believe i'v ever seen this flash before. im transfering information off a friends computer that is hear threw the hub and im takin alot of his computer. Why is this light on or flash? what dose it mean? There is also COL over the 10 100 where the light is

 

stopped after major transfer..anyone know what it means

 

Why are you in the upload port?
Everyone should be in a standered port.

So - Router to Port 1 - Cpu 1 to Port 2 - Cpu 2 to port 3 etc.
Upload empty.

 

why should upload be empty? that dun make since. that's how all the ports get the internet

 

Are you guys referring to the 'Uplink' port? If so this port is used to connect two devices such as hub/switch/router to each other. Uplink generally shares the last port available on the device in question. Uplink is used to expand the network connections to more nodes by means of using additional hubs, switches and routers.
So lets say you have a routers with 4-ports, a 5-port switch and 6 computers, how do you share your Internet connection amongs the 6 PCs and also create a LAN?
You connect the router to the cable/dsl modem via designated port, now you have 4 ports at your service, you connect the router using the 4th port and the 'uplink' port on the switch. So now you have 3-ports that you could directly connect to 3 PCs and 4 additional ports on the switch for the rest. 5th port on the switch is out of service since the 'uplink' port is used which generally shares the last port....
This was an example.

 

yea that is exactly how i have it just a bigger switch. but why dose the red uplink light come on when im transfering information between 2 computers on just the hub?

 

Ok grander scale I have another example:

When I use a hub in our network to monitor traffic I only use the uplink (crossover port) to connect another hub or switch. The T1 comming from the PIX is always in a standered port with any monitoring PCs in the HUB. In turn any thing comming from the HUB to the patch panel is also in a standered port. This gives me full access to all servers and PCs on the network as well as the net.

This is the way I have the hub in our 600 user network, I still dont see why you are using the uplink port. I mean you are only using this for 2 computers?

 

Shiju got a point, it sounds like you are trying to create a setup more complex than you need...even a overkill, but anyhow I was a bit confused with your setup and with Shiju's example I am like Alice in Wonderland (may be the damn flu?)

Typical reasons for IP collisions:
~ Incorrect network hw wiring(setup)
~ Incorrect network configuration on PCs and/or other applicable network hw
~ faulty hardware (NIC, switch, etc)

once the collision occurs, even if you correct the problem, you may need to unplug all network cables, power off network hardware and re-connect cables and power on the hardware to reset the traffic, etc.

 

there is no over kill involved. it's very simple actually

 

Ok, please read this about collisions. They are a normal way to operate in an ethernet environment. There can be excessive collisions and that would be a problem but it would have to be alot. Seeing your "COL" light flash is ok. It sounds that you may have a duplex missmatch. Most hubs now can do 10/100 but depending on the hub may only support half-duplex. That may be why you are seeing a red link light, I dont know your hub, but it should be written in the manual what it means. Anyhow read this, its very simple. Don't get hung up on the collisions as a problem.

A collision is the mechanism used by Ethernet to control access and allocate shared bandwidth among stations that want to transmit at the same time on a shared medium. Because the medium is shared, a mechanism must exist where two stations can detect that they want to transmit at the same time. This mechanism is collision detection.

Ethernet uses CSMA/CD (Carrier Sense Multiple Access/Collision Detect) as its collision detection method. Here is a simplified example of Ethernet operation:



1. Station A wishes to send a frame. First, it checks if the medium is available (Carrier Sense). If it isn't, it waits until the current sender on the medium has finished.

2. Suppose Station A believes the medium is available and attempts to send a frame. Because the medium is shared (Multiple Access), other senders might also attempt to send at the same time. At this point, Station B tries to send a frame at the same time as Station A.

3. Shortly after, Station A and Station B realize that there is another device attempting to send a frame (Collision Detect). Each station waits for a random amount of time before sending again. The time after the collision is divided into time slots; Station A and Station B each pick a random slot for attempting a retransmission.

4. Should Station A and Station B attempt to retransmit in the same slot, they extend the number of slots. Each station then picks a new slot, thereby decreasing the probability of retransmitting in the same slot.

In summary, collisions are a way to distribute the traffic load over time by arbitrating access to the shared medium. Collisions are not bad; they are essential to correct Ethernet operation.

 

and there is the answer!! very simple thank you very mutch!! the hub dose support half and full duplex it should be on full but i will check..thank for the info!!!