13 messages in net.nether.puck.cisco-nsp[c-nsp] GSR and 3750 GE-LX link problem
FromSent OnAttachments
Yu-lin ChangJan 11, 2005 4:28 am 
McCallum, RobertJan 11, 2005 4:38 am 
Joe ShenJan 11, 2005 4:49 am 
Yu-lin ChangJan 11, 2005 5:05 am 
Yu-lin ChangJan 11, 2005 5:08 am 
Joe ShenJan 11, 2005 5:36 am 
McCallum, RobertJan 11, 2005 5:41 am 
CEW CEWJan 11, 2005 9:16 am 
Michael K. SmithJan 11, 2005 4:03 pm 
Gert DoeringJan 11, 2005 4:21 pm 
Michael K. SmithJan 11, 2005 4:23 pm 
Gert DoeringJan 11, 2005 4:27 pm 
Michael SmithJan 11, 2005 5:48 pm 
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Subject:[c-nsp] GSR and 3750 GE-LX link problemActions...
From:Yu-lin Chang (ylch@seawind.org)
Date:Jan 11, 2005 4:28:59 am
List:net.nether.puck.cisco-nsp

Hi,

I am recently working on a GE link between a GSR and a 3750. The GSR side is GBIC-LX, the 3750 side is SFP-LX, and the fiber is single mode. GSR in 32F, and 3750 is placed in 28F.

The GSR config is, interface GigabitEthernet1/0 ip address 10.100.251.221 255.255.255.252 no ip directed-broadcast end

The 3750 config is, interface GigabitEthernet1/0/26 no switchport ip address 10.100.251.222 255.255.255.252 end

When I plug the fiber, GSR and 3750 can see each other by using "show cdp neighbor". Also, the MAC addresses are correctly learned by each other.

BUT, the problem is they cannot ping each other.

After many many tried to change negotiation mode and made loopback check. There is no problem on the fiber itself, I am almost been driven to crazy.

Do you ever have such weird problem?

Regards, Yu-lin