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3845 extra gig port - NM or HWIC?

I have a 3845 that needs another GE port (in addition to two onboard) - seemingly I could get a NM-1GE or a HWIC-1GE-SFP - what are reasons I would chose one over the other (price independent)?

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Re: 3845 extra gig port - NM or HWIC?

The NM might have more bandwidth. (NMEs, at least on 37x5s, are noted as 1 Gbps.) A Q&A notes the HWIC bus is limited to 400 Mbps.

On a 3845, sustained gig throughput itself, could be an issue if limited to the 3845's 500 Kpps rating.

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