LAG and VLAN

[xnimrodh1]

Hello,

I have a GigE vision camera that implement static LAG (The camera have two 1G NIC's) in order to receive 2G Ethernet.

This camera is connected to a computer also with two 1G NIC's that implements static LAG in order to receive more that 1Gbps of video over Ethernet.

In the middle i have a cisco switch.

The camera is connectd to the switch with two ports and the computer is connected to the switch with two ports.

The only solution that work for me to receive more than 1G of video is to separate those 4 ports in the switch to 2 different VLANs.

The 2 port of the camera will be in VLAN 10 and 20 and the 2 port of the computer will be in VLAN 10 and 20.

Is there any other way to receive more than 1G of video without VLAN configuration??? 

Thanks,

Nimrod.

[Reza Sharifi]

Hi,

The max speed you are going to get is 1Gig, as each link is only a Gig. If you want to get more than that, you would need to look at other switches that do 10Gig, but that means your camera has to have 10Gig ports on it. 1Gig should be more than enough for one camera even with HD picture.

Usually an HD steam is not more than 10Mb.

HTH

[xnimrodh1]

Hello,

You are not right.

If i work with teaming i can receive more that 1G.

Both camera and computer have TEAM on both of there NIC's.

Nimrod.

[Jon Marshall]

I would be very careful telling someone with Reza's knowledge and experience he is not right.

Etherchannel, which is what you are talking about, load balances across the links based on different src/dst pairs.

Depending on the switch that could be mac addresses, IP addresses, ports etc.

It is a common misconception that you can get more throughput between the same two end devices using the same application with etherchannel but you can't.

And in your setup the src and dst are the same for all these things ie. the computer and the camera.

Therefore the switch will only ever use one link in the etherchannel.

If you had two computers then it would probably use both links.

Jon

[xnimrodh1]

Because of that i configure two VLANs in the switch where the camera is connected to and the same two VLANs in the switch where the computer is connected to. Once i did that i was able to receive more than 1G of video from the camera.

Nimrod.

[Jon Marshall]

Yes you would be able to do it that way.

What is your point ?

Jon

[xnimrodh1]

Ok. To the point.

I have a second computer also connected to the switch with only one NIC. When i try to send him data from the first computer i am having problems because the first computer have two NICs with teaming and also two VLANs. How can i communicate with the second computer???

Thanks,

Nimrod.

[amikat]

Hi,

Provided your Cisco switch supports Private VLANs (it is platform-dependent) you can TRY to use this feature for your task. The idea is to configure one Primary VLAN and two Secondary Community VLANs. One GigE Vision camera port and one NIC LAG port would connect to 1st Community VLAN ports, the other pair to 2nd Community VLAN ports. Finally you would configure the Promiscuous port to connect your second computer which would enable communication with either NIC Community port.

Good luck!

Best regards,

Antonin

[devils_advocate]

I would be surprised if your Camera is going to be able to push more than 1Gb of traffic anyway.

As Reza and Jon have both pointed out, Port Channeling is not the aggregating of bandwidth for a single host. 

You could aggregate 8x 1Gb links and a single host would still only get 1Gb of bandwidth. 
8 hosts could theoretically use 8Gb of bandwidth between them but not 8Gb per host.