nanog mailing list archives
Re: Problems connectivity GE on Foundry BigIron to Cisco 2950T
From: Martin Hannigan <hannigan () world std com>
Date: Sun, 15 Jan 2006 20:44:03 -0500 (EST)
Hi Randy, On Sun, 15 Jan 2006 11:10:04 -1000 Randy Bush <randy () psg com> wrote:You are using a crossover cable right?I'm having a right mare trying to get a Foundry BigIron to connect up to a cisco 2950T, via Gigabit copper.i was under the impression that gige spec handled crossover automagicallyAccording to "Ethernet, The Definitive Guide", that feature is an optional part of the spec. One thing I've heard people encounter is that if they use a cross-over cable, which probably really implies a 100BASE-TX cross-over, then the ports only go to 100Mbps. A Gig-E rated straight through, in conjunction
And a GE rated cable is CAT5. Non transmission is using multi mode and all long haul transmission uses single mode. If you review the gig spec, it was designed for CAT5. Regardless, I always use CAT6 and I stick with the standard ethernet caps although I tend to go upscale on the caps and the compresssion tools i.e. calibrateable and matching to caps. For example, at mumble carrier, we spent weeks in the labs qualifying cable, caps, and crimpers - copper and coax - and then making it a systemwide standard for techs and vendors. Funny story though. Mumblecarrier had people walking by tugging on the new ds3 installations and they started falling out. The center managers started mailing each other and then all of a sudden the freakin' things were falling out all over the country. I went out to one of the datacenters, jacked up the test gear, and started looking at it. While I was sitting there being stumped as to what was happening, I watched no less than ten people walk by and tug on the cross connects. The next day, same thing and they'd look at me and go "SEE!!! THEY FALL OUT!!!!!". What had happened was mass cable hysteria. Once the center managers started telling each other to "pull on the xcons" they all started being stressed and then they had every tech pulling on them and if you pull on it enough - it will fall out. Thank you for allowing me that off topic spew. :-) -M<
Current thread:
- Problems connectivity GE on Foundry BigIron to Cisco 2950T Sam Stickland (Jan 15)
- <Possible follow-ups>
- RE: Problems connectivity GE on Foundry BigIron to Cisco 2950T David Hubbard (Jan 15)
- RE: Problems connectivity GE on Foundry BigIron to Cisco 2950T Sam Stickland (Jan 15)
- RE: Problems connectivity GE on Foundry BigIron to Cisco 2950T Randy Bush (Jan 15)
- Re: Problems connectivity GE on Foundry BigIron to Cisco 2950T Mark Smith (Jan 15)
- Re: Problems connectivity GE on Foundry BigIron to Cisco 2950T Martin Hannigan (Jan 15)
- RE: Problems connectivity GE on Foundry BigIron to Cisco 2950T Farrell,Bob (Jan 15)
- Re: Problems connectivity GE on Foundry BigIron to Cisco 2950T Paul G (Jan 15)
- Re: Problems connectivity GE on Foundry BigIron to Cisco 2950T Sam Stickland (Jan 15)
- Re: Problems connectivity GE on Foundry BigIron to Cisco 2950T Sam Stickland (Jan 15)
- Re: Problems connectivity GE on Foundry BigIron to Cisco 2950T Elijah Savage (Jan 15)
- Re: Problems connectivity GE on Foundry BigIron to Cisco 2950T Kevin Day (Jan 15)
- Re: Problems connectivity GE on Foundry BigIron to Cisco 2950T Mark Smith (Jan 15)
- Re: Problems connectivity GE on Foundry BigIron to Cisco 2950T Sam Stickland (Jan 15)
- Re: Problems connectivity GE on Foundry BigIron to Cisco 2950T Mark Smith (Jan 15)
- Re: Problems connectivity GE on Foundry BigIron to Cisco 2950T Sam Stickland (Jan 15)
- Re: Problems connectivity GE on Foundry BigIron to Cisco 2950T Paul G (Jan 15)