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I've been tasked with distributing broadband across a campus and have a few questions regarding switching...
Another department has installed a 1000mb BT broadband bearer within a WAN room which I can use. The connecting network rooms across the site is via OM1 backbone (Presented ST either end).
The core switch off of the bearer has a spare 10gb port configured for public use. I need to add another distribution switch from theirs as I have to reach numerous buildings. The port that has been configured is at 10 gb, does this mean I have to use a 10gb distribution switch? Also because my back bone is only OM1 and some of the cable lengths are around the 500m mark one maybe closer to 700m I wont achieve 10g over these lengths???
From the network rooms the LAN - horizontal is copper. Would I need a copper switch with a 10gb SFP uplink or could this be a 1gb SFP??? What happens If I use a 10gb SFB but because of the length and quality of cable I’m not getting anywhere near 10gb at the other end?
A bit of advice would be much appreciated as it's rather confusing!!
If I procure a 1gb distribution switch, how will this connect to the 10gb port on the core switch?
I found the model M4100-12GF, this will be the switch under the core switch (if we can use a 1G port from the core switch). For the 4 other switch, I am suggesting models M4100-26G or M4100-50G. If there is no choice but to use the 10G, I'll see if I can find another solution and get back to you on that.
I believe you can still get 10gb connection when using the correct cables and SFP modules. See this article, basically have a (little) similarity to your issue. I can probably recommend some products that you can use.
I would like to introduce you to our high speed 10-Gigabit switches family. You may have to decide first on how many ports you are going to utilize, do you already have swicthes on the locations? I am quite concerned about the OM1 cables might not deliver 10Gb (just like what I have mentioned on my first post you'll need to use the correct cables and modules to reach 10Gb speed on the distance you mentioned, see this article).
My bacbone lengths are too long for 10gb over OM1, Eventhough I won't aceive 10gb will the distribution switch still link to the core switch over greater distances.
Otherwise I'll have to go for a 1gb coe switch. what do you think?
Given the length and cabling limitations, I believe 1Gb is the fastest we can go. You can choose from our wide range of smart gigabit swicthes (configurable models), it'll be able to help you manage and monitor network traffic.
The core switch I'm getting the broadband from only has a 10gb port configured for my use. If I procure a 1gb distribution switch, how will this connect to the 10gb port on the core switch?
Yes, we do have switches that can interact with 10GbE but I'll have to get some more information so I can give you the products you may need. I have listed my questions below:
1. Brand name and model of the core switch.
2. Does the core switch support SFP+ or does it use 10GbE RJ-45 connectors?
3. For the switch that will be connected to the core switch, how many ports do you need?
4. Are the OM1 cables multimode or single?
5. Is it really a 500m OM1 or does it have switches in every few hundred meters?
Please check this module that we have and see the distances that can be accomodated. So all in all, there is a slim chance of making it work without upgrading the cables.
The core switch is a Cisco Catalyst 3850 24S there is a mixture of 1gb & 10GB SFP ports but only a 10gb port has been configured for my use.
The switch connected to it should have 24 port for future expansion.
The OM1 cable are multimode 62.5/125.
One on the LAN rooms is 500M away all one length of cable. Other LAN rooms are between 200 - 300m.
There is a very slim chance that the switches will work at 10gb. is it possible to use a 1gb sfb to connect to my new distribution switch from the core switches 10gb port or do you think it's worthwhile I get the ISP to activate a 1gb port on the core switch?
At 500m with OM1 multimode cable speed will be less than 1GbE, the maximum distance of OM1 to use 1 GbE speed is 300M. You can refer to this article. Do you have a diagram on how the network will be setup? Is there a way to connect a switch 200-300m away from the core switch?
Unfortunately there isn't anywhere I can add a switch between WAN room and the LAN rooms.
I'm aware all the data suggests I won't achieve 1gb over OM1 at these distances but in reality is 300m the maximum range? We're told cat5e's max range is 100m but we know 150m cable run will work albeit not at maximum efficiency!
All I really need is for my access switches to be able to connect to the distribution switch, if the efficiency is compromised a little it's not too important because I am only using this network for broadband.
If I procure a 1gb distribution switch, how will this connect to the 10gb port on the core switch?
I found the model M4100-12GF, this will be the switch under the core switch (if we can use a 1G port from the core switch). For the 4 other switch, I am suggesting models M4100-26G or M4100-50G. If there is no choice but to use the 10G, I'll see if I can find another solution and get back to you on that.
If you could possibly find a 10gb solution I would be grateful. In the meantime I'm going to investigate the feasibility to using a 1gb port on their switch.
It looks like I'm going to be able to get the ISP to configure a 1gb port.
I have checked with one of my suppliers, they can't get hold of the distribution switch you've mentioned but have recomended I use a GSM7328FS V2 M5300-28GF3 instead. What are your thought on this?
A little pricey (for the M5300-28GF3), but that will work as well and a very good alternative(Fully manageable). For the modules and other switches, check if your suppliers carry the items below:
