ErrDisable at SFP Interface between C3750 with C3560

Answered Question

Hello,

Requirement: connecting 2 lan switches with SFP cable.
The LAN Switches to be connected are: C3560-24TS+2SFP with C3750-24TS+2SFP
Cable SFP: CAB-SFP-50CM-cable

when the installation is done, the error show up in the SFP interface, as below:

Port      Name               Status       Vlan       Duplex  Speed Type
Gi1/0/1                      err-disabled 1            auto   auto unknown

Test_Switch#sh interfaces status err-disabled


suspected err is from the cable, which is not working for both lan switch.

Port      Name               Status       Reason
Gi1/0/1                      err-disabled gbic-invalid


Question: what type of cabling is suitable/compatible to be used for connecting 2 different types of lan switches?

Run the errdisable recovery but not help much.


Thanks in advance.
Regards,
Hira

I have this problem too.
0 votes
Correct Answer by Aaron Harrison about 6 years 10 months ago

Hi

As I understand it, you can only use that cable with 3560s:

http://www9.cisco.com/en/US/products/hw/switches/ps700/products_tech_note09186a00800a7af7.shtml#patch-cable

Quote 'The Catalyst 3560 switch supports the SFP module patch cable, a 1/2 meter, copper, passive cable with SFP module connectors at each end. The patch cable can connect two Catalyst 3560 switches in a cascaded configuration. '

Or https://supportforums.cisco.com/docs/DOC-1515/diff;jsessionid=0C72B9E367B58777F2C7AF045001E637.node0?secondVersionNumber=3

Regards

Aaron

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Correct Answer
Aaron Harrison Fri, 03/26/2010 - 04:43

Hi

As I understand it, you can only use that cable with 3560s:

http://www9.cisco.com/en/US/products/hw/switches/ps700/products_tech_note09186a00800a7af7.shtml#patch-cable

Quote 'The Catalyst 3560 switch supports the SFP module patch cable, a 1/2 meter, copper, passive cable with SFP module connectors at each end. The patch cable can connect two Catalyst 3560 switches in a cascaded configuration. '

Or https://supportforums.cisco.com/docs/DOC-1515/diff;jsessionid=0C72B9E367B58777F2C7AF045001E637.node0?secondVersionNumber=3

Regards

Aaron

Please rate helpful posts...

Hello,

Yap, you are correct. that cable can be only used for 3560s.

I want to order below SFP for connecting the C3560 with C3750:

Cisco Gigabit Ethernet SFP: Cisco 1000BASE-T SFP
Part Number: GLC-T SFP-GET3
Description: 1000BASE-T SFP Transceiver Module for Category 5 copper wire.

is that a correct SFP type?

Thanks again

Regards

Hira

Leo Laohoo Sun, 03/28/2010 - 21:05

GBIC-invalid would probably means that you have a non-Cisco SFP.

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