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Connecting 2 JGS524Ev2 Smart Switches over single cable - with mirror port to work across both units
Hello. I have 2 JGS524Ev2 switches on separate floors, with 1 cable.
I also have this unit: https://www.dualcomm.com/collections/network-tap/products/gigabit-copper-network-tap, which sits bet...
Please read this thread. This will not work since the switch does not support RSPAN.
RSPAN allows you to monitor traffic from source ports distributed over multiple switches, which means that you can centralize your network capture devices.
As per your network drawing, you have network tap in place, you can extend it's monitoring port over either a cable or a netowrk link, e.g. a dedicated VLAN to the sniffer device.
The switches local mirroring port capability isn't ued in your usage context at all, isn't it?
Hello. Thank you.
I have the mirror port on floor 0. That's where the sniffer is.
The span port is on floor 1. That's where the data is.
I seem to be having difficulty getting the traffic to floor 0.
When I plug the span data into switch on floor 1, it seems to knock make my internet unusable (I think there's a loop).
So I tried to create a VLAN on both switches (vlan2), thinking I would isolate the span data to vlan2.
Then, mirror this vlan to my mirror port on floor 0.
That doesn't seem to work.
Here's what I did.
Set up LAG on port 10 on both switches (so they are aware of each other ... I think that's the use case, yes?)
Set up VLAN2 on port 5 on both switches (so they can share the span data.
floor 1 - pipe data into port 5.
floor 0 - mirror port 5 into my mirror port (2).
This does not work.
Any further thoughts? Your help is greatly appreciated.
The switch mirror ports don't come into the play. All you want to do is to configure a virtual network "cable" using a dedicated VLAN - from the tap to the sniffer system - though the switch infrastructure.
Tap<->VLAN5portuntagged<->LAGwithVLAN5tagged<->VLAN5portuntagged<->Sniffer
The switch port mirroring does act (mostly) like a network tap.
Don't forget to add the selected VLAN(tagged) to the LAG serving as a trunk connection.
Can I do this all over a single cable between both switches? Unfortunately, that's all I have between floors.
Floor 0 has lots of traffic that pipe to Floor 1 for internet connectivity.
Thank you again for your assistance with this
Over a single network cable you can't run a LAG of course - the total amount of data can't exceed the 1Gb bandwidth (without data packet loss). At the end of the day it depends on the bandwidth you run on the Internet connection to be monitored on the tap. Of course high tech solutions like switches with 10G (cabling permitting) or at least Multigig (2.5G or 5 G) Ethernet could be considered, but that would be beyond. Adding cables is usually much less expensive.
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