I have a customer who is currently replicating storge over a 1Gb WAN between the two sites. They are running out of bandwidth and are going to upgrade their 1Gb Fiber link from SP to 5Gb. They have Cisco C-6816-X-LE line card and requested 10Gb SFP+ ZR module to support this configuration. My understanding is that 10SFP+ only support 10Gb speed and nothing less. To me, it is a mismatch beween the 10Gb SFP+ and actual line speed which is only 5Gb.
is there any alternative?
Thanks,