3550-12G + 3524 using Gigabit-over-Copper = Not working.

[boodox]

Hi There,

I'd really appreciate some help. I'm having a little trouble with a GB link between a 3550-12G and a 3524-XL using 5483 Copper GBIC's and Cat5 cable.

The 12G is running IOS 12.1(19)EA1c and the 3524 is running IOS 12.0(5.3)WC(1) both of which support the 5483 Copper GBIC's. The two devices are physically cabled no more than 60m apart (maximum)

When connected and unshut, the 3550-12G is showing Up/Up and sending data with no errors but the Gigabit on the 3524 is showing Down/Down and is not sending/receiving anything. I've tried:

Checking the config (all okay)
Replacing the GBIC's on both ends (same problem)
Changing the cabling at both ends (same problem)
Changing patch panel ports (same problem)
Using Fibre connectivity between the 2 ends using 5484 Fibre GBIC's (comes Up/Up both ends)

I've run out of ideas so I was just wondering if anyone had any suggestions or has experienced anything similar. I'd appreciate some advice.

Thanks in advance!

 

[dirtyhat]

Boodox,

Did you verify that spanning-tree bpduguard enable is not on either interface?

 

[dirtyhat]

I just read the bottom of your post and saw that it does come up with SC--SC connection.

Make sure you have a X-over cable when connecting the two switches together with Cat5.

 

[boodox]

Thanks dirtyhat!

That's the strange thing. I am using a X-over cable and it's showing Up/Up on the 12G but Down/Down on the 3524.

One thing I HAVE just noticed. I cleared the counters on both devices and a show interface on the 12G is showing data "Output" but no "Input" on the Gigabit Interface .

On the corresponding 3524 Gigabit interface, it's showing data "Input" but not "Output" even though the Interface is showing Down/Down. How does that work?

Anyone have any ideas?

bdx

 

[dirtyhat]

boodox,

That is quite a strange issue. I have not used the copper GBIC's in a 3550-12G, but I am currently using them in multiple 3550-24-TX and 3550-24-FX switches with no problems. I only use the copper GBIC's for Access connections when the extra bandwidth is required.

At this point I would suggest trying an IOS upgrade possibly 12.0.5-WC10 (ED), If that doesn't work, shoot for the TAC.

In your first post, I didn't see where you tried the other available GBIC port 3524.

 

[vipergg]

Your problem is the 3524 code is not high enough , below is the gbic compatability chart for the 5483 from cisco. You are only running 12.0.5Wc1 must be at least 12.0.5 WC3b so the latest code for the box will work at 12.0.5. Wc10 .




Yes (Cisco IOS Release 12.0(5)WC3b)