Shadrack Posted December 5, 2002 Share Posted December 5, 2002 Is there anything wrong with connecting two hubs together with a crossover cable? Besides somewhat of a limitation of bandwidth between the two hubs is this really any sort of a big deal? Me and my buddy networked this one buisness. They have some software that runs on Windows 2000 Server (Altapoint i think it is called, some medical software) and they keep on having problems with it crashing every once in awhile. They call up their Altapoint technical support and their technical support keeps on saying that they are not suppose to have 2 hubs hooked up. I'm thinking their technical supports job is to make sure their customers can go blame someone else :angry:. There are like 4 computers on each hub. I doubt there is ever a 100% network load if even 50%. Feedback appreciated..maybe I have some misconception or something. But i've been networking for awhile now and this has never been a problem in the past. Thanks -Nic Link to comment Share on other sites More sharing options...
thingsforjason Posted December 5, 2002 Share Posted December 5, 2002 there should be no problems. just have them make sure the crossover cable is going to two normal ports on each hub...if they have uplink ports then they should use a normal cable, and only one end should be in an uplink port. at home i run a wireless router to a 24-port hub which is uplinked to an 8 port switch....no problems there... Link to comment Share on other sites More sharing options...
JHAres Posted December 5, 2002 Share Posted December 5, 2002 I don't know the hubs you are using and their specifications, but your solution seems to be ok... Anyways, if your hubs have an "UPLINK" port, the "orthodox" way is: from a standard port to the "UPLINK" port in the other hub with a "normal" cable... BTW... your cables are built using the right standard for RJ45 (EIA/TIA 568 or 598B)...??? Some people use straight built cables(pairs 1-2,3-4,5-6 and 7-8) and this is WRONG.... pairs must be properly connected to avoid EM interference... Pairs are one "some color" cable, and one "same color + white"... The right connection is: 1st pair: pin 1 and 2 2nd pair: pin 3 and 6 3rd pair: pin 4 and 5 4th pair: pin 7 and 8 If you don't follow this rule, the EM interferes, because the EM "cancellation" effect between pairs is lost... Hope this helps... :cool: P.S.: This is a FACT, I've tested and corrected wrong installations, suffering "misterious" connections lost... ;) Link to comment Share on other sites More sharing options...
Shadrack Posted December 5, 2002 Author Share Posted December 5, 2002 Everything works. It is hooked up right. I can transfer files back and forth with no problems. Everyone is Pinging at >1ms Link to comment Share on other sites More sharing options...
JHAres Posted December 6, 2002 Share Posted December 6, 2002 Everything works. It is hooked up right. I can transfer files back and forth with no problems. Everyone is Pinging at >1ms Just look my "P.S.".... P.S.: This is a FACT, I've tested and corrected wrong installations, suffering "misterious" connections lost... Check your cables... :cool: Link to comment Share on other sites More sharing options...
Shadrack Posted December 6, 2002 Author Share Posted December 6, 2002 The right connection is:1st pair: pin 1 and 2 2nd pair: pin 3 and 6 3rd pair: pin 4 and 5 4th pair: pin 7 and 8 If you don't follow this rule, the EM interferes, because the EM "cancellation" effect between pairs is lost... This is how I make a standard wire on both ends: Looking at the RJ-45 opposite of the notch WO O WG Bl WBl G WBr Br (WO means White and Orange) Is this what you are saying? I don't know the pins or anything. Also I'm using these Netgear hubs with "Auto-uplink" so I just used a normal cable and it figured out the rest. I haven't seen this before. But it was pretty cool. Link to comment Share on other sites More sharing options...
JHAres Posted December 6, 2002 Share Posted December 6, 2002 Just in case... I forgot the right "crossover" cable pinout: RJ45 Plug 1 Tx+ -------------- Rx+ 3 RJ45 Plug 2 Tx- -------------- Rx- 6 3 Rx+ -------------- Tx+ 1 6 Rx- -------------- Tx- 2 :cool: Link to comment Share on other sites More sharing options...
JHAres Posted December 6, 2002 Share Posted December 6, 2002 This is how I make a standard wire on both ends:Looking at the RJ-45 opposite of the notch WO O WG Bl WBl G WBr Br (WO means White and Orange) Is this what you are saying? I don't know the pins or anything. Also I'm using these Netgear hubs with "Auto-uplink" so I just used a normal cable and it figured out the rest. I haven't seen this before. But it was pretty cool. Yup.... thats is what I'm saying.... your "colors" are ok... so that's not the problem... :blink: Nice feature the "auto-uplink"... but you first said you used a "crossover" cable, and now you are saying you used a "normal" cable.... uhh...??? :ermm: If you used a "crossover" cable, be sure that "magic" "auto-uplink" feature, supports that kind of cable... I'm almost sure you have tested with a "normal" cable too... :p Link to comment Share on other sites More sharing options...
Shadrack Posted December 6, 2002 Author Share Posted December 6, 2002 Ok well i did bounce around. I said it was a crossover cable to simplify my original message. The truth is the two hubs have auto-uplink and can figure it out for themselves. But virtually what is made is a crossover between the two hubs. Well, my buddy is going to go rewire the place and just have 1 hub. This buisness is going to lose their technical support from this expensive software if they don't. I think that is a bunch of crap, but what can you do? :wacko: Link to comment Share on other sites More sharing options...
JHAres Posted December 6, 2002 Share Posted December 6, 2002 Ok well i did bounce around.I said it was a crossover cable to simplify my original message. The truth is the two hubs have auto-uplink and can figure it out for themselves. But virtually what is made is a crossover between the two hubs. Well, my buddy is going to go rewire the place and just have 1 hub. This buisness is going to lose their technical support from this expensive software if they don't. I think that is a bunch of crap, but what can you do? :wacko: Sometimes tech support s*cks... it's obvious those guys knows nothing... :crazy: Link to comment Share on other sites More sharing options...
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