nanog mailing list archives
RE: Problems connectivity GE on Foundry BigIron to Cisco 2950T
From: sam_ml () spacething org
Date: Mon, 16 Jan 2006 01:06:18 +0000 (GMT Standard Time)
Hopefully the cisco copper GBIC supports Auto-MDI though, so a straight cable should be good.
S On Sun, 15 Jan 2006, David Prall wrote:
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256GigE 1000Base-T requires all 4 pairs of wire. Auto-MDI is not supported on the 2950 series, so it won't handle this automagically. I would test with speed set to 100 if the foundry can support 10/100/1000 with the Copper GBIC. Put the two next to each other and test with 1000Base-T crossover cable, removing all the extra stuff if that doesn't work.1000Base-T requires that pairs 1 and 4 are also crossed along with 2 and 3. http://en.wikipedia.org/wiki/Crossover_cable David - -- David C Prall dcp () dcptech com http://dcp.dcptech.com-----Original Message----- From: owner-nanog () merit edu [mailto:owner-nanog () merit edu] On Behalf Of Mark Smith Sent: Sunday, January 15, 2006 5:44 PM To: Randy Bush Cc: dhubbard () dino hostasaurus com; sam_ml () spacething org; nanog () nanog org Subject: Re: Problems connectivity GE on Foundry BigIron to Cisco 2950T 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 with the automatic crossover feature, was necessary to get to GigE. Regards, Mark. -- "Sheep are slow and tasty, and therefore must remain constantly alert." - Bruce Schneier, "Beyond Fear"-----BEGIN PGP SIGNATURE----- Version: PGP Desktop 9.0.3 (Build 2932) iQEVAwUBQ8rlb4YwPzEDHVgLAQjCAQgAnb36uEi0T6NuJZj7bu2vJXPgr7Y0rFK8 TjDip2kT1DYwf3mF2j0ZPCWIh7eKM4skx431VB9C8nq5glUwtOv7LYxnyMHCsyTo W6aixupMiDA2l4po1pxzoNaw1p2CVvdTxhVBEG/AP73+Ls9k2lgJii59X+4BF8qw ChmZwGdQ8GDOIWKjvax63hbsprBhf1ORUwP2qZPcg2p8P4M0yqznhrk84VpSipGU itdv/juvrFmfkGyPSozBqErpYx4hmVzBz6uLPQ2cF6ux48sPIUDz3+ta49xKlMwY zhON0whXxZA49YlwZZV5CzbjAmp8/zJWfMnl76kYkISxOqgX0Xo9dg== =D7cE -----END PGP SIGNATURE-----
Current thread:
- Re: Problems connectivity GE on Foundry BigIron to Cisco 2950T, (continued)
- 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)
- Re: Problems connectivity GE on Foundry BigIron to Cisco 2950T Sam Stickland (Jan 15)
- Redux - RE: Problems connectivity GE on Foundry BigIron to Cisco 2950T Sam Stickland (Jan 19)