Connecting two buildings - 80m apart
- Thread starter blun
- Start date
Why not hire a Floor Saw & cut a channel in the concrete yard about 3" or 4" deep.
Laid in some MDPE Blue Pipe 20mm, cost £28 per 50 mtrs from Screwfix, look on the bay you can find 100 mtr rolls around £45, maybe cheaper, also need two or three 20mm mdpe pipe joiners, plus some cement & aggerate for concrete repair.
You will need a 30mtr flex draw tap best to do 25mtrs or so run at a time, I usually pull through two cords first, & use one to pull the final cable through when complete pipe is laid & BEFORE concreting, any problems, you haven't got to dig up the concrete to fix the problem, ie cord breaking, (had it happen myself). Other cord is to pull through a future cable.
Done this trick numerous times to run Cat 6, power cables between buildings.
It's a fairly cheap way to laid a cable underground between buildings.
http://www.hss.com/g/43234/Floor-Track-Saw-Petrol-350mm.html
Laid in some MDPE Blue Pipe 20mm, cost £28 per 50 mtrs from Screwfix, look on the bay you can find 100 mtr rolls around £45, maybe cheaper, also need two or three 20mm mdpe pipe joiners, plus some cement & aggerate for concrete repair.
You will need a 30mtr flex draw tap best to do 25mtrs or so run at a time, I usually pull through two cords first, & use one to pull the final cable through when complete pipe is laid & BEFORE concreting, any problems, you haven't got to dig up the concrete to fix the problem, ie cord breaking, (had it happen myself). Other cord is to pull through a future cable.
Done this trick numerous times to run Cat 6, power cables between buildings.
It's a fairly cheap way to laid a cable underground between buildings.
http://www.hss.com/g/43234/Floor-Track-Saw-Petrol-350mm.html
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Why confused? I wouldn't be happy with company data going down an unsecured line. A cable between buildings is less than secure, suppose its a CAT5 cable - anyone can crimp a CAT5 cable with a couple of quid of ebay. Cut the cable where it enters the building and have full access to the internal / server vlan? No chance, I'd want it terminating on a firewall, with only allowing the other building VPN to connect.
It would be fibre for a start so getting up a ladder to a suspended run with a splicing kit is probably not so easy.
Neither is digging up a a channel to splice either.
Why do you assume getting physically onto the network would give you "Full access" to the network?
If they are going to do what you suggest they could also put a brick through a window and just plug straight into a switch port. There is being cautious and then there is paranoid. Adding another layer of complexity that can be thwarted by the most rudimentary methods seems like a pointless exercise.
Neither is digging up a a channel to splice either.
Why do you assume getting physically onto the network would give you "Full access" to the network?
If they are going to do what you suggest they could also put a brick through a window and just plug straight into a switch port. There is being cautious and then there is paranoid. Adding another layer of complexity that can be thwarted by the most rudimentary methods seems like a pointless exercise.
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Switches should be in locked rooms and buildings usually have alarms... Do as you want, but I hardly call setting up a firewall with site to site vpn complex (for a networking section of a computer forum).
Ok its a point but a rather small one. I would use fibre to make this problem harder. A VPN tunnel is a silly idea. This drops through put, adds more complicated layers and is more expensive. Some simple steps would increase security.
My argument is that anyone with a proper knowledge setting this up would use a proper trunk set up between 2 switches using port security, dot1q encapsulation, sticky mac-address and acls. This can be implemented on a Cisco 2950 easily.
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I used to run Cat5 and fibre for a living (Have all the qualifications and stuff) and unless it has changed (I doubt it as it is a standard) the acceptable distance for Cat5 is 95m inclusive of any fly leads etc
I would say to use fibre if he can afford it but it really depends what will be at the other ends of the cables. You might get away with Cat5 if the cab room was at the closest points of the buildings
Also whatever he chooses i would run multiple cables incase of failure
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Actually the company I work for as just two systems like this. I believe we have a number of different connections one of them I know of is a microwave link to a building about 900 meters away I am not really sure how robust this connection is but I dont think we have ever had any problems with it. Some guy comes every year to calibrate it thats about all I know. The other system we have is a number of direct fibre connections to the local exchange I believe. I know BT and Virgin are involved quite a bit with this becuase we are always having engineers onsite to work on the `data centre`. I believe we have a connection from each company.
You could also try contacting some local ultilties companies. You might be lucky and be able to get some drainage diagrams and pay them a small fee to route your cable in there ductings. I think they did that where I work with some cables after talking to the local water company but dont not 100% sure on that. I would be careful about getting permissions to lay your cable through other people property though some people can be fussy about that stuff and unless you are a utility company I dont think you have much right to access.
You could also try contacting some local ultilties companies. You might be lucky and be able to get some drainage diagrams and pay them a small fee to route your cable in there ductings. I think they did that where I work with some cables after talking to the local water company but dont not 100% sure on that. I would be careful about getting permissions to lay your cable through other people property though some people can be fussy about that stuff and unless you are a utility company I dont think you have much right to access.
Got a microwave link between two buildings and never had any issue with it, couldnt do fibre as we havent decided what we are doing with the ground in between the buildings so needed to wait until that is decided before putting fibre ducts in place.
Why?
Did you do any tests on packet loss? What type of cable?
IME normal Cat5 will suffer over 100M.
