Cisco Support Community
Community Member

The compatibility for the Catalyst 3750

Dear,Are you sure that third party GBICs are not supported in the series of Catalyst 3750?what shall we do then the third party GBICs can be supported in these new switches.I heard that Cisco coded his switch via EPROM,Cisco's switches is too expensive to be buyed by most user,so they need the cheaper GBICs from third party who can offer the GBICs that can be able to compatible with the Cisco,Could you help me about the compatibility and send some resource to resolv this question,my name is Best Wang and my email at Thanks very much.Hope to receive your email.Thanks again.

Cisco Employee

Re: The compatibility for the Catalyst 3750

If you are referring to SFP GBICs, yes only Cisco SFP GBICs are supported on 3750

Community Member

Re: The compatibility for the Catalyst 3750

"WDM, copper, and SFP GBIC's all include a GBIC EEPROM "code" that certifies the GBIC as coming from Cisco. New versions of IOS/CatOS check this code to verify the GBIC - if the code is not found, or is not valid, the software will disable the port in software and will not allow traffic to pass. Older GBIC's (5484/5486/5487) were manufactured before this feature was introduced, and do not contain this feature. Regardless, TAC will not troubleshoot a GBIC that was not purchased from Cisco, the same policy as Flash/DRAM memory."



PS: You should discuss pricing with your Cisco AM.

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