With a router...How do I block L3 communication between VLANs? This is a new area to me.
EEEhhh, what?@xvo its an interVLAN network... you need a router to block the L3 communication between VLANs.
Nothing was said, unless you see the photo again...
To me this sounds a job for a pair of VLAN switches without any routing capability whatsoever.Is it possible to put 3 networks down a fiber connection then break them out at the other end?
Same for me.Nothing was said, unless you see the photo again...
OP said
To me this sounds a job for a pair of VLAN switches without any routing capability whatsoever.Is it possible to put 3 networks down a fiber connection then break them out at the other end?
You are welcome... yes that might me better.Thanks Zacharias this is well out of my comfort zone looking like I will have to get some one in for this
I wonder how @xvo and @mkx would isolate those subnets on L2 and L3 with the use of only managed switches...This will be VOIP server and phones local Internet access and first hot-spot. Along with first batch of security cameras
Each of the networks can have it's own router, for example.I wonder how @xvo and @mkx would isolate those subnets on L2 and L3 with the use of only managed switches...
Am just happy that am a step ahead...
As I wrote from the start - two devices on you picture don't have to be routers.xvo this is a new project out of what I have done before. So looking for some help and constructive comments!
Bottom line: the answer to your original question is that you definitely can use one optical fiber for multiple isolated networks, that is common practice, and not rocket science at all. So you can safely start "digging trenches" for your line and return to the decision whether you want to "struggle" configuring your network yourself or hire someone to help you somewhen later on your projectThanks xvo its just a big learning curve for me as I have always dealt with simple networks this one is a big challenge for me and a lot for me to learn. I am an engineer not a software person wires, wifi and fiber I can understand the programming side of things I struggle with.
You call imagination the fact that i can see with my eyes 3 different subnets on the provided photo ?Yeah, you are right, that's your feature - jumping to conclusions based on your imagination only.
There is no doubt about 3 different subnets, but this fact does not imply in any way that you need to take any special measures to isolate them from one another if you use VLAN-aware switches instead of routers on the picture. The L3 isolation is automatically provided by the "L2.5" isolation, i.e. the VLANs: as the tagging and untagging is provided by the switches and only one VLAN is permitted on each port except the trunk one facing towards the remote switch, there is no way how the three L3 subnets could talk to each other even if some device connected to one of the access ports was clever enough to handle tagged frames.You call imagination the fact that i can see with my eyes 3 different subnets on the provided photo ?
I always thought Moscow time was ahead of Athens time (at least during winter).yes am a step ahead.. in time zone too...
@richard_s, for me, "programming" means expressing algorithms (something like if condition then action_x else action_y). Stay assured that you don't need programming in this sense to obtain your goal. Speaking in hardware language, as a frame is being received from the wire via a switch port which is configured as an access one to a VLAN, four bytes (a VLAN tag) get inserted into its header if the destination port isn't an access one to the same VLAN; in the mirror scenario, if the received frame contains a VLAN tag whose VLAN ID part matches the one of the destination port, the four bytes of the tag get removed. So on the cable between the two sites, frames belonging to each VLAN are sent with tags, and on the access port to each VLAN the tags are added/removed so the connected equipment doesn't know anything about their existence. The only difference as compared to three separate cables is that the VLANs share (in other words, compete for) the common bandwidth of the interconnecting link.I am an engineer not a software person wires, wifi and fiber I can understand the programming side of things I struggle with.
Yup... That right there. If no switch is layer 3 or a router... You are not getting from one subnet to the others.
In fact, in such a setup you need a router to allow communication between the VLANs, not to block it.
Whatever.You call imagination the fact that i can see with my eyes 3 different subnets on the provided photo ?Yeah, you are right, that's your feature - jumping to conclusions based on your imagination only.
Really ?
I ve seen many times as well enginneers not seeing the obvious... no offense too....
since you use VLANs with different subnets in some point of time for some reason you will need a L3 isolation... so yes am a step ahead.. in time zone too...
So i am twice ahead