Questions tagged [cable]

The questions tagged that way are for the physical aspect of the cable, like length limitation, physical properties, tubing, installation, etc..

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12
votes
4answers
27k views

10GbE sfp+ cross over cable required? Is there such a thing?

To preface, this is my first experience with 10GbE networking and I have encountered an issue which my research does not seem to locate a solution for... I have two servers (older DL580G5 and DL380G5)...
8
votes
6answers
57k views

How to test cat5/cat6 cable runs, using software-only, or simple tools? [closed]

Are there any utilities or simple tools or techniques to easily test a CAT5 cable, to see how well was it installed? Cat5 is often installed by amateurs, but has been installed and "working" for ...
9
votes
1answer
345 views

LAN: What are the things to look at when arriving in a new place

My company is moving to a new place, and the only thing I know about the cabling is that there are cables and a patch panel. I have no idea about the cable speed, quality, and I'm a software guy with ...
7
votes
2answers
867 views

Can I use CAT 6a connectors with 7a cable (and get 6a performance)?

I'm re-wiring a building and want to get the best cable possible laid - it required re-plastering to make a change to the cables and the cables will be there for the next 10 - 20 years. Currently ...
0
votes
1answer
521 views

Airport Express as extender, can I use RJ45 to connect device to it? [closed]

So, my situation is as follows. I have a network printer without wi-fi support. I have an Airport Express set up as a wifi extender (i.e. it just hangs in the power socket, repeating my wi-fi network, ...
2
votes
2answers
936 views

Wall jacks to patch panel?

OK, I'm by no means a seasoned networking pro and I had no say so in the design of our current server room which is in dire need of an extreme makeover. Basically, in our server room we have 12 wall ...
3
votes
1answer
2k views

Cat 5/6 Software based cable certification

Is there any software that will certify cable using only two NIC's and software to run the test? Would a NIC be able to test a cable based on the physical internals that it's made of? I'm ...
13
votes
5answers
75k views

Cat 6e vs Cat 6a

From what I can understand, Cat 6e does not actually exist but a number of manufacturers are selling some cable labeled as Cat 6e. Some sources say that Cat 6e is just Cat 6a but the manufacturers ...
1
vote
2answers
497 views

Network testing tool cat6 cables [closed]

I have been trying to crimp cat6+ cables at home and been having issues. some would work fine at gig others would only go to 100mb. Is there a reasonable tester out there for verifying a cable run ...
4
votes
4answers
2k views

Converting an Ethernet Coupler to a Crossover Adapter

I want to add a crossover to my network toolbox. Aside from an actual an actual crossover cable, I like the idea of an adapter (figure 1). There are crossover adapters available online, but I’m ...
0
votes
1answer
1k views

CAT5e RJ45 splitter with CAT6 network: compatibility & performance

I need to connect 2 PCs on a single RJ45 socket on the wall. The network is wired with CAT6 cables. I have seen a few RJ45 splitters that seem to do just that, but they are all for CAT5e cables. Here ...
1
vote
1answer
245 views

Do 10m external SAS cables work?

According to the Wikipedia page external SAS cables are specified for up to 10m length. However, I found it pretty hard to actually find places that sell cables of that length. This made me wonder: ...
8
votes
8answers
2k views

Stripping cat5 cable which doesn't have a ripcord

I need to patch a couple of cables. Normally I'd work with cat5 cable which contains a ripcord. The ripcord is used to pull outer insulation off without accidentally cutting the individual strands of ...
4
votes
6answers
2k views

Cutting patch cables to length

I'm rewiring a rack, and would like to have the cabling cut to length to make things as tidy as possible. The suppliers of Cat5e/Cat6 cable I've found only really supply bulk cable in multiples of ...
0
votes
1answer
594 views

How do you explain ethernet cable problems to non networking people? [closed]

We've recently been doing a large network migration in our datacenter. We've had a few cables in this start to deliver really bad pings (in excess of 500ms on a LAN) before they could be replaced. ...
11
votes
4answers
2k views

Why is a suspended ceiling not allowed in a wiring closet?

I have read in the book Cabling: The Complete Guide to Network Wiring that wiring closets should not have a suspended ceiling. In a few Google searches, I see this concept repeated. I have not been ...
83
votes
2answers
41k views

What happens when you plug two sides of a cable to a single networking device?

What is likely to happen when you plug two ends of a network cable to a single switch/router? Will this create problems on the network, or just be ignored?
1
vote
3answers
182 views

Cross cable auto route back if NIC is down? [closed]

UPDATE: I just clarified with my friend, he actually meant, the traffic will be passed through from the LAN to WAN port, it's specific to device, in our case it's the Symantec Web Gateway Appliance. ...
3
votes
2answers
586 views

External SAS cable or adaptor with 90 degree plug

We have an HP tape autochanger mounted in a rack, but it's so deep that with the external mini-SAS cable plugged in we cannot close the rear rack door - if we did we'd crush the SAS cable well beyond ...
0
votes
2answers
2k views

Which SAS Cable is required for to connect SAS drive to RAID controller

I have two 2.5" SAS drives which have a SFF-8482 connector. I also have an LSI 9211-8i controller card, as well as a TYAN motherboard with a SAS controller. Both of these controllers use the SFF-8087 ...
2
votes
9answers
59k views

Why would cat6 connectors not work with cat5e patch cable?

I had a naff batch of cat5 connectors (the latching mechanism didn't work) so decided to order in some cat6 connectors in preparation for the inevitable upgrade. My existing reel of for making patch ...
6
votes
2answers
721 views

Tool(s) for labeling cables with unique ID numbers

We are looking to (finally) implement a cable labeling procedure. We already have a labler. Now we need a system to maintain unique IDs not related to anything. I thought of getting a tally counter ...
0
votes
1answer
2k views

Many ARP requests in TCP dump?

I have been experiencing very slow upload speeds on my cable network lately. I ran a tcpdump and found many ARP requests. I'm not sure what process they are coming from, but could this be related to ...
1
vote
1answer
494 views

Are there corner connectors for rj45?

I cant find connectors or cables that have a turn at their end of the connector. (90 degrees) This might be trivial to some. Do they exist at all? Edit: I draw a picture for this
10
votes
2answers
2k views

Cable management strategy for a small chassis switch

I'm working with a small site buildout that contains a single HP ProCurve 4200vl chassis switch. The data cabling contractor did not provision for any cable management. I'm looking at the rack ...
1
vote
1answer
348 views

Wiring up RJ45 plugs on a basic network extension

I'm trying to wire up a network in an outbuilding. Unfortunately the engineers have left me bar wires so I need to add plugs and sockets. I have a 1gbps socket in the outbuilding that connects to the ...
0
votes
1answer
283 views

Network Cable Testing Diagnostics

I've recently helped a friend wire his new office up with Ethernet cable wall sockets that all connect to a central patch panel. The issue I currently have is with testing the cable.. I receive the ...
-2
votes
1answer
291 views

Is it possible to create a Gbit network with cross-cable?

If I want to connect two NIC, then I ""must"" use cross-cabling. But: Can I create a Gbit network with a cross-cable? p.s.: The question is for cross-cable!!
6
votes
5answers
2k views

Looking for a software alternatives to a Fluke Meter

I have cat5 ports through out the office that seem to not work 100%. I wanted to know if there is a software alternative to the $1000 Fluke Meters, that I can do the same thing with. Maybe something I ...
4
votes
3answers
601 views

Cable Management

I was given the task of (re)organizing cables in one of our racks, and I have never done this before. What system/equipment do you use to organize your cables? The rack I have is 23" and has 19" ...
0
votes
3answers
567 views

Which cables are “active” in the UTP cable

I believe there are 4 cables inside the UTP cable that are "active" for data, the rest might be for activity and other stuff. I need to know which colors represent the data transfer from an UTP ? Or ...
1
vote
2answers
2k views

How can I troubleshoot APIPA (169.254.x.x) in physical network cabling?

all: We have just started using an existing Cat5e cable to run 100Base-T to a new office, but unfortunately, machines in the new office see link but receive an APIPA address (169.254.x.x). I brought ...
1
vote
2answers
2k views

Cisco 2516 Console access via RJ45 port?

I have just taken delivery of a basic Cisco lab and I would like to check the routers and switches etc. are in 'working' condition before I start playing around with them. The first hurdle is ...
6
votes
3answers
806 views

Looking for this special RJ45 modular connector so I can terminate my own cables

We're doing a rewiring project at my work (server room is a mess of cables) and we've decided to go the route of cutting each cable to length and terminating them ourselves. In the past, I've used ...
11
votes
4answers
3k views

Industry Standards for Network Infrastructure Labeling

Are there any current industry standards IEEE, ISO, ANSI.... available that state how a buildings physical infrastructure should be labeled at the rack and jack and how the documentation should be ...
8
votes
6answers
2k views

Structured Cabling Server Racks

We have the opportunity next week to rewire five server racks which is currently in a real mess. Each rack currently has a switch installed up top with lots of cables hanging around. We are thinking ...
3
votes
1answer
170 views

Acquiring location - need cable map/toning/testing done in house…tools needed?

I was going to ask "best approach?" but I figured it would be closed. I know how to tone/test a cable...but I'm looking for tools, ideas, approaches that will make the following project manageable ...
2
votes
2answers
3k views

How to decide cross or straight cable

I know that you have to connect same devices with cross cable and differents with straight. Although, that's the common idea, in Cisco Packet Tracer you have to connect a PC and a router with cross ...
2
votes
1answer
181 views

What is the easiest way to attach sata cables to the backplane of a 1U super micro case?

It seems that the raid controller breakout cable thats designed for the backplane makes its incredibly difficult to cable it. The right angle bend sata cables need to bend down, making it very ...
1
vote
2answers
274 views

Using 110 Blocks and Cross Connects for Data connectivity?

I recently started a new position and upon investigation it appears all data drops from the floor first gets punched down on a 110 block, cross connected to another 110 block and then connects to a ...
9
votes
2answers
2k views

How do I label the network ports in our office?

We have a new office that was punched down with Ethernet in every office and every cubicle. The electrician didn't mark the ports on the patch panel or the wall ports, so I don't know where say port 1 ...
3
votes
5answers
13k views

SFP+ twinax cable compatibility

How compatible are twinax SFP+ cables when used with different hardware vendors' equipment? E.g. are Cisco SFP+ cables fine between an Arista switch and a Solarflare card? How about an Amphenol cable ...
0
votes
1answer
532 views

Managed Switch console cable?

As per a few other SF questions; I have recently purchased a D-link managed switch. It's a DES-3550. It has a serial port on the front for console access and according to the manual this uses a ...
4
votes
3answers
2k views

Moving server room to another part of the building

This question is a bit different than the typical we are moving our server room to an off site location or we are moving the whole office to a new building. Management wants to add some more office ...
4
votes
6answers
3k views

Do you really need cable management for a cabinet with just switches and patch panels?

We are about to start wiring out a building expansion and our vendor has laid out the racks in the following configuration: Option 1 1U Fiber patch panel 2U Cable Manager 2U 48 port Patch Panel 2U ...
18
votes
6answers
4k views

What else do I get with Cat 6 beyond future proofing my wiring?

We are about to put in the wiring in an expansion of our office building and the vendor is proposing we use Cat 6 cabling because it is "faster." Gigabit works fine over Cat 5e which is what our ...
3
votes
3answers
2k views

replacing an ethernet backbone with fibre optic

I live and work in a building that is nearly 20 years old. My Internet connection is in the cellar along with my servers and has a nominal rating of 100 MBit. I have a gigabit switch in the cellar ...
1
vote
5answers
390 views

Is there a way to measure the speed after changing over from CAT 5/ CAT 5e to CAT6?

We have recently done a change in our network by using CAT 6 cabling. Now I would like to measure the speed difference when I use Cat 5 or Cat5 e and Cat 6. Is there a way to find out the same?
7
votes
1answer
3k views

How to remove a stuck wiring Snake?

I've managed to get a Snake stuck in ribbed conduit. I managed to get about 15 feet of the snake in the tube before it stopped advancing and now I can't get it out. How can I remove it without ...
0
votes
2answers
3k views

difference between noise and interference? [closed]

does anyone know the diffrece between noise and interference ?