[c-nsp] GigE Link Problem

[Michael Smith]

Hello:

Try using "speed nonegotiate" on the 3750 along with the "set port
negotiation 2/50 disable" on the 2948.

Mike 

> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net 
> [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Mark Taylor
> Sent: Tuesday, October 26, 2004 1:26 AM
> To: cisco-nsp at puck.nether.net
> Subject: [c-nsp] GigE Link Problem
> 
> Sorry if this does re-post, but I don't think it made the 
> list originally due to a problem at my end:
> 
> Hi,
> 
> I am connecting a 3750-48TS switch to a 2948G switch with 
> Gigabit Ethernet.
> The 3750 has a 1000BaseSX SFP port (GLC-SX-MM) and the 2948G 
> has a 1000BaseSX GBIC (WS-G5484). These are connected 
> together with a 3m length of SC-LC multimode fiber.
> 
> I cannot get the link between the two switches to establish. 
> I have tried reverseing the TX and RX on the SC end of the 
> fiber, using different fiber, using a different GBIC and 
> using a different SFP.
> 
> I have tried "set port negotiation 2/50 enable" on the 2948G 
> which didn't work. When I turn off this negotiation on the 
> 2948G using "set port negotiation 2/50 disable" it displays a 
> link light and connected status, but the 3750 shows a down 
> port. You cannot force the speed or duplex as the ports have 
> a fixed config of 1000 full.
> 
> Does anybody have any ideas why this might be happening and 
> configs which will make it work?
> For reference the 2948G is CatOS and 3750 is IOS.
> 
> Thanks in advance,
> Mark.
> 
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