Keep in mind that with so much unsupported slack in the cables the weight from the cables (copper is not light) it can put enough tension onto the connectors (both the plug and the port) to actually cause damage. I've seen pins bent enough to start effecting their tension a couple of times, the port "packs" inside the switch loosened if they are not attached well to the frame/board, and more commonly the cable itself is bent out of spec just past the plug so much that the cable doesn't always pass a recertification test.
I've never seen the issues I've listed with the switches on modern Enterasys equipment, but we're almost exclusively a DFE shop and can't speak to A/B/C equipment. The cable issues however, have cropped up from time to time especially in our higher density installs. Luckily, most of our connections are still 100Mbps which is tolerant enough to deal with a Cat5E or Cat6 not quite meeting spec. But, as we move into more 1Gbps, 10Gbps and up I'm getting more paranoid about avoiding future issues due to mistakes of the past. For what it's worth, -- David P. Allen Director, Systems & Communications Information & Technology Services Pacific Lutheran University t: 253-535-7524 f: 253-536-5099 Darrin Green wrote: > Jesse, > > No, we don't have to remove any cards. There is patch cable slack in > the vertical cable manager and all we have to do is use the slack to > get enough clearance to un-patch and pull out the card we need to > replace. The optimum way would be to feed the cables from the top but > we could not find a cable manager that could handle the density. > > > >>> <[email protected]> 6/17/2009 4:43 AM >>> > > */Classification: NON SENSITIVE INFORMATION RELEASABLE TO THE PUBLIC/* > > > > Darrin, we're just going through re-cabling all of our 38 E7 chassis. > The way you have your slots 1-3 cabled, you will not be able to > remove the cards in slot 1 and 2 without un-patching the higher number > cards completely. > > > > Regards, > > > > > > *Jesse W. Ohlsson* > > Engineer, Information Systems Administration > > NCSA Sector Mons, Customer Services Squadron > > B7010 SHAPE Belgium > > tel: +32-65-44-8518; NCN 254-8518 > > > > > > > > > > *From:* Darrin Green [mailto:[email protected]] > *Sent:* Tuesday, June 16, 2009 18:13 > *To:* Enterasys Customer Mailing List > *Subject:* Re: [enterasys] Enterasys N-series 72 port blade > > > > Hi Richard, > > > > There is no easy solution. With a N7 orientation being vertical and a > N3 orientation being horizontal we decided to use the side channels on > the vertical cable manager to feed copper cables. Fiber is fed from > the top. This setup allows access to fan trays and power supplies. > > > > Darrin Green > > Senior Technical Support Specialist > > > >>> "Richard Hart" <[email protected]> 6/16/2009 9:52 AM >>> > All, > Does anyone have any pictures of the 72 port blade for the N-series > chassis fully cabled? > We are interested in the blade, but are having difficulty justifying > the purchase of such a blade because it seems that cabling the blade > could be a problem. > Thanks, > Richard > > > Richard Hart > Telecommunications Engineer > Tidewater Community College > > > > --- > To unsubscribe from enterasys, send email to [email protected] with the > body: unsubscribe enterasys [email protected] > > * --To unsubscribe from enterasys, send email to [email protected] > <mailto:[email protected]> with the body: unsubscribe enterasys > [email protected] > > * --To unsubscribe from enterasys, send email to [email protected] > <mailto:[email protected]> with the body: unsubscribe enterasys > [email protected] > > * --To unsubscribe from enterasys, send email to [email protected] > <mailto:[email protected]> with the body: unsubscribe enterasys > [email protected] > --- To unsubscribe from enterasys, send email to [email protected] with the body: unsubscribe enterasys [email protected]
