nanog mailing list archives
Re: cross connect reliability
From: Seth Mattinen <sethm () rollernet us>
Date: Sun, 20 Sep 2009 23:48:56 -0700
Luke S Crawford wrote:
Richard A Steenbergen <ras () e-gerbil net> writes:You've never seen a single port go bad on a switch? I can't even count the number of times I've seen that happen. Not that I'm not suggesting the OP wasn't the victim of a human error like unplugging the wrong port and they just lied to him, that happens even more.I know it happens; it's happened to me, and I have probably touched fewer switches than you. Still, from what I can understand, it can be prevented/minimized by the use of a grounded port. from: http://support.3com.com/documents/switches/baseline/3Com-Switch-Family_Safety-Reg-Info.pdf "CAUTION: If you want to install the Switch using a Category 5E or Category 6 cable, 3Com recommends that you briefly connect the cable to a grounded port before you connect to the network equipment. If you do not, the cable’s electrostatic discharge (ESD) may damage the Switch's port. You can create a grounded port by connecting all wires at one end of a UTP cable to an earth ground point, and the other end to a female RJ-45 connector located, for example, on a Switch rack or patch panel. The RJ-45 connector is now a grounded port."
HP chassis switches ship with a grounding jack accessory you attach to the DB9 port (I assume it ties all RJ-45 pins to shied/ground) explicitly for this purpose. The instructions say to always plug a cable into the grounding device before connecting to a switch port. ~Seth
Current thread:
- RE: cross connect reliability, (continued)
- RE: cross connect reliability Deepak Jain (Sep 17)
- Re: cross connect reliability Pete Carah (Sep 17)
- Re: cross connect reliability Marshall Eubanks (Sep 17)
- Re: cross connect reliability Charles Wyble (Sep 17)
- Re: cross connect reliability Richard A Steenbergen (Sep 17)
- Re: cross connect reliability Mark Andrews (Sep 17)
- Re: cross connect reliability Warren Kumari (Sep 18)
- Re: cross connect reliability Chris Adams (Sep 18)
- Re: cross connect reliability Valdis . Kletnieks (Sep 18)
- Re: cross connect reliability Luke S Crawford (Sep 20)
- Re: cross connect reliability Seth Mattinen (Sep 20)
- Re: cross connect reliability Richard Golodner (Sep 17)
- Re: cross connect reliability Mike Lieman (Sep 17)
- Re: cross connect reliability Jon Lewis (Sep 17)
- Re: cross connect reliability Mike Lieman (Sep 17)
- Re: cross connect reliability Jon Lewis (Sep 17)
- Re: cross connect reliability Jon Lewis (Sep 17)