[c-nsp] GSR and 3750 GE-LX link problem

[Yu-lin Chang]

Hmmmm....

The 3750 is mine but the GSR is owned by another ISP.
It's too risky to turn on OSPF, I think...


Regards,
Yu-lin

----- Original Message ----- 
From: "McCallum, Robert" <robert.mccallum at thus.net>
To: "'Yu-lin Chang'" <ylchang at seawind.org>; <cisco-nsp at puck.nether.net>
Sent: Tuesday, January 11, 2005 5:38 PM
Subject: RE: [c-nsp] GSR and 3750 GE-LX link problem


can you try to enable ospf on the interface.  I reckon it will come up
(multicast traffic).

Robert McCallum 
CCIE #8757 R&S


> -----Original Message-----
> From: Yu-lin Chang [mailto:ylchang at seawind.org] 
> Sent: 11 January 2005 09:29
> To: cisco-nsp at puck.nether.net
> Subject: [c-nsp] GSR and 3750 GE-LX link problem
> 
> 
> 
> 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
> 
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