Managed PoE switch

amrogers3

Gawd
Joined
Nov 7, 2010
Messages
623
I am running a pfSense box on an old SuperMicro server and looking to segment off a bunch of IP cameras via a manage switch VLAN.

I am not very knowledgable on switches, I just have been using a basic unmanaged 5 port Netgear for most of my networking.

Can someone bit more knowledgeable on the subject help me figure out what I would need?

Here is some spec info on the cameras:
Main stream: 3840 × 2160 @(1–25/30 fps)
Sub stream: 704 × 576@1–25 fps/704 × 480@1–30 fps
Third stream: 1920 × 1080 @ (1–25/30 fps)

I figure there will be x8 3rd streams and x8 Main streams going at the most at any one time. Maybe this x2 for the two streams.

Accounting for full 4K just to be on the safe side and if my calculations are correct, 2x107.2 = ~214 MB/s.

Screen Shot 2021-10-26 at 1.25.14 PM.png


Problem is, I dont know how to calculate what switching capacity, packet forwarding rate, and the packet buffer memory I need for the switch.
 
Last edited:

Eulogy

2[H]4U
Joined
Nov 9, 2005
Messages
2,518
I am running a pfSense box on an old SuperMicro server and looking to segment off a bunch of IP cameras via a manage switch VLAN.

I am not very knowledgable on switches, I just have been using a basic unmanaged 5 port Netgear for most of my networking.

Can someone bit more knowledgeable on the subject help me figure out what I would need?

Here is some spec info on the cameras:
Main stream: 3840 × 2160 @(1–25/30 fps)
Sub stream: 704 × 576@1–25 fps/704 × 480@1–30 fps
Third stream: 1920 × 1080 @ (1–25/30 fps)

I figure there will be x8 3rd streams and x8 Main streams going at the most at any one time. Maybe this x2 for the two streams.

Accounting for full 4K just to be on the safe side and if my calculations are correct, 2x107.2 = ~214 MB/s.

View attachment 406732

Problem is, I dont know how to calculate what switching capacity, packet forwarding rate, and the packet buffer memory I need for the switch.
Well, you already conflated units. Mb/s is not MB/s.
For your tiny installation, your packet data is not going to make any modern manage switch struggle.
 

amrogers3

Gawd
Joined
Nov 7, 2010
Messages
623
Cool cool. Thanks.

If I set up a VLAN for the cameras and a VLAN for everything else, would a layer 3 switch be able to communicate between the two VLANs as opposed to a layer 2 which would not?

P.S. looking at the Ubiquiti USW‐Pro‐24‐PoE.
 

Eulogy

2[H]4U
Joined
Nov 9, 2005
Messages
2,518
I mean, it depends on a variety of things. Devices on trunk ports will be able to access devices on both (all, really) VLANs (this is how you'd setup routing if you need to cross VLANs). Devices on access ports will only be able to access devices in the tagged VLAN.

VLANs are layer 2 only, nothing layer 3 about them.
 
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BlueLineSwinger

[H]ard|Gawd
Joined
Dec 1, 2011
Messages
1,115
Cool cool. Thanks.

If I set up a VLAN for the cameras and a VLAN for everything else, would a layer 3 switch be able to communicate between the two VLANs as opposed to a layer 2 which would not?

P.S. looking at the Ubiquiti USW‐Pro‐24‐PoE.

If you get a layer-3 switch, then yes, the two VLANs/subnets can communicate directly without having to go through the router. With a layer-2 switch they'd have to go through the router (i.e., functionally the same as having a router with two LAN NICs and a switch on each).

But be careful with lower-end L3 switches. Maybe it's gotten better, but last I knew their performance was not great for L3 functions and sometimes lacking in features/capabilities, especially with IPv6.
 
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