Need a little networking help switches

[Ninety]

Curious if there are switches out there that have dual uplink ports to help speed up transmission.



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[d4v0s]

Hard to imagine a single 1gb port wouldn't handle your needs. Need more information of what your doing.

[lazyworm]

most of the time, it's the internet service provider that is the bottleneck. Most if not all commonly available switches/home routers are faster.

Please describe your setup for better suggestions.

[SkyHawk]

It's called portchannel on Cisco, and you can aggregate up to 8 ports, even 8 x 10Gb port. You can have up to 8 more ports for standby. And you can also trunk VLANs over them.

But these aggregated ports still transmit at the speed of one port per application. An algorithm based on several factors including TCP/UDP port numbers determines which channel is used. So even just a single PC driving traffic will utilize multiple switch ports in the group, but not for a single session/application (like say a single FTP transfer)

[Satex]

Curious if there are switches out there that have dual uplink ports to help speed up transmission.

Yes, most business class switches support port bonding.

[Ninety]

Thanks.

Trying to bid a rather large IP camera job. Multi level

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[NiMiK]

LACP will help but it will not increase your throughput since a single stream will not split the packets through different interfaces.

[lazyworm]

Thanks.

Trying to bid a rather large IP camera job. Multi level

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You'd really need to do your math on this. How many cameras? What resolution? What compression algorithm? How "busy" in front of the cameras? What is the min/avg/max bandwidth requirement for each?

Then get a big enough pipe for the uplink.

port bonding can be problematic, might be easier to get a 10gb switch.

[Ninety]

You'd really need to do your math on this. How many cameras? What resolution? What compression algorithm? How "busy" in front of the cameras? What is the min/avg/max bandwidth requirement for each?

Then get a big enough pipe for the uplink.

port bonding can be problematic, might be easier to get a 10gb switch.

That's what I was trying to figure out.
Running homeruns from NVR to camera isn't going to work. It might but I'm not sure. Still need to walk it.

I was thinking a Poe switch on every floor.

System is 32 4.1 MP cameras. H.264
Not sure on the other details. Some will be parking lot some will be offices and hallways .

Might use some 3 MP cameras in smaller areas.. maybe some 6MP in others



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[lazyworm]

That's what I was trying to figure out.
Running homeruns from NVR to camera isn't going to work. It might but I'm not sure. Still need to walk it.

I was thinking a Poe switch on every floor.

System is 32 4.1 MP cameras. H.264
Not sure on the other details. Some will be parking lot some will be offices and hallways .

Might use some 3 MP cameras in smaller areas.. maybe some 6MP in others



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google came to the rescue, quick search found this: http://stardot.com/bandwidth-and-storage-calculator

Looks like roughly 12.8Mbps per camera (H.264, high resolution, 5MP)
But in short, 1gig ports should be plenty for your application.

[d4v0s]

Good work so far in this thread. Common part that's overlooked is the bandwidth of the people looking at these cameras. In my world I have 4 people in different sites wanting to access 40+ cameras. And they love the tacticool look of having 16-24 cameras per screen.

But I had to get it down to 9 cameras per view, and logically seperate them to keep the bandwidth low coming out of the server.

[Ninety]

Good work so far in this thread. Common part that's overlooked is the bandwidth of the people looking at these cameras. In my world I have 4 people in different sites wanting to access 40+ cameras. And they love the tacticool look of having 16-24 cameras per screen.

But I had to get it down to 9 cameras per view, and logically seperate them to keep the bandwidth low coming out of the server.

That's my concern. I'm not entirely sure what they want.. and would rather over engineer it then have issues.

I just wasn't sure if I was going to run into issues running multiple switches back to the NVR.

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[Satex]

Thanks.

Trying to bid a rather large IP camera job. Multi level

Take into account that you will need switches with bonding/trunking capability on both sides of the link. since you are doing a IP video job, does the DVR have multiple Ethernet ports? It won't do you any good to trunk the backbone if the DVR can't handle it.

[Ninety]

NVR is commercial grade 32 port for cameras. I need to see what it has for the uplink side.

Has 384 Mbps throughput..

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[lazyworm]

NVR is commercial grade 32 port for cameras. I need to see what it has for the uplink side.

Has 384 Mbps throughput..

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eek! 384/32 = 12Mbps per camera. Based on the estimates above, you're right on the edge there. Assuming they did not marketing-ize the specs.

I'd worry that the NVR has no room to grow before the network switches.