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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.
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.
Hello. Not running more then 1G.
So, can you tell me what I would need to configure?
I thought LAG was so both switches are aware of each other.
Can you advise on how I can make this work so it all works? Again:
floor 0 switch -> floor 1 switch for internet connectivity.
floor 1 data -> floor 0 switch for mirror port capability.
Thank you.
Do you need a mirror port on the floor 0 switch _or_ the ability to get the tap device located on floor 1 from floor 0 as shown on your network layout? Still confusing information.
Create a 802.1q VLAN, e.g. VLAN ID 5 on both switches,
add the VLAN 5 to two ports used for the trunk (the connection betwwen the switches) as tagged,
define the two ports (for the tap and for the sniffer) for VLAN ID 5 untagged, PVID 5.
Now you have an independant VLAN for connecting the tap and the sniffer - almost like a dedicated cable.
Apologies for any confusion. Let me try again ...
Floor 0, I have a sniffer, and a mirror set up, and it works perfectly.
Floor 1, I have data that I want to get to the sniffer on Floor 0, so that data can be examined by the sniffer on floor 0.
Floor 0 works perfectly. Mirror set up, works fine. Sniffer set up, works fine. Uplink to internet works fine.
Floor 1, same - everything is fine (can access floor 0 without issue). Trying to get data to sniffer on floor 0 is the problem.
Does that help clarify?
Becuase the data is a FULL COPY of all network traffic (between wifi & cable modem), I need to isolate it, so only sniffer can see it, otherwise I get all sorts of CRC errors becuase other devices are trying to respond to it.
So, can I send a copy of all data from floor 1, to floor 0 for sniffer (via mirror port on floor 0) to inspect, without disturbing anything else?
I only have 1 cable between both routers (between floors).
Thank you.
The switch mirror port data can't be forwarded over the network - it's intended to be used locally.
I still don't understand now how the Datacom Tap and the description you have on your schema comes into the play - because it's 180° different from what you request now.
I'm trying to get the data from the dualcomm from floor 1 to floor 0.
I already have a mirror / sniffer on floor 0. Need this to inspect data from dualcomm from floor 1.
I don't think I have changed my description, but if I did, I'm sorry. That is really the only goal. Data from dualcomm on floor 1 to be inspected on floor 0. How do I get that data to show up on a port on floor 0, so it can be inspected on floor 0?
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.
okay. thank you for providing access to that thread. I guess case closed, unfortunately :-(
Thank you!
njguitarman wrote:
I'm trying to get the data from the dualcomm from floor 1 to floor 0.
As I said - no need to configure any mirror ports. Create a VLAN and configure accordingly so you have a virtual "cable" from the Tap to the Sniffer.
But we're looping here... also if you had high end managed switches with RSPAN this would not be required for your purpose - which is in brief replace a simple network cable from the Tap to the Sniffer.
Thank you. I appreicate your reply.
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