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Re: Problems connectivity GE on Foundry BigIron to Cisco 2950T

  • From: Sam Stickland
  • Date: Sun Jan 15 19:04:59 2006

Replying to my own email..

I've found some sites that suggest it's not possible to disable auto-negotiation on 1000Base-T since other operational parameters are negotiated including selection of the master clock signal. I was aware that flow control was negotiated, but not the clock signal.

Can anyone elaborate?

Sam


On Sun, 15 Jan 2006, Sam Stickland wrote:

Hi,

On Sun, 15 Jan 2006, Paul G wrote:
----- Original Message ----- From: "Farrell,Bob" <[email protected]>
To: "Randy Bush" <[email protected]>; "David Hubbard" <[email protected]>
Cc: "Sam Stickland" <[email protected]>; <[email protected]>
Sent: Sunday, January 15, 2006 4:45 PM
Subject: RE: Problems connectivity GE on Foundry BigIron to Cisco 2950T

Cisco commands-



speed 1000
duplex full



the bigiron wants (iirc):

spe 1000-full

i strongly suggest you peruse the cli reference for both devices.




On the foundry GBIC blades you can't configure the speed and duplex settings,
they only support 1000-full.



(config-if-e1000-1/2)#speed-duplex 1000-full

Error - can't change speed and duplex mode



I've dug through as much information as I can about the cisco 2950T and
802.3z/802.3ab and disabling the auto-negiation. There appears to be no
command at all available to do this.



The cabling arrangement is:



Foundry -- Straight -- Patch -- Underfloor -- Patch -- Crossover -- Cisco

GBIC Cable Panel Straight Panel Cable



If I replace the final crossover cable with a straight, change the foundry to
a 10/100 port, and plug the final end into a host NIC instead of the cisco I
get a connection. Crossover cable has been changed twice now, and the RJ45
GBIC was previously working in a cisco 6500.



I am extensively familar (at least I believe I am) with both these models,
and this one has me stumped.



If nobody else can see any configuration errors I guess I'm down to hardware
issues.



Sam