We have a few catalyst 3550/3560/3750 and as far as I know they only support 8 routed SVI:s each.
Although it is possible to create more than 8 SVI:s, it is not supported by Cisco. I would like to reduce these switches to two or three, thus increasing the number of SVI:s om each switch. What other Catalyst switch supports more than 8 routed SVI:s? I know that 4500 series and 6500 series catalysts will do the job, but do Cisco have other L3 switches?
A Layer 3 switch can have an IP address assigned to each routed port and SVI. The number of routed ports and SVIs that you can configure is not limited by software. However, the interrelationship between this number and the number and volume of features being implemented might have an impact on CPU utilization because of hardware limitations. To optimize system memory for routing, use the sdm prefer routing global configuration command.
That's a very good observation. I've searched internally and I can't find a conclusive answer to this limitation.
What I've found is a suggestion to verify your CPU performance as soon as you go over the 8 routed interfaces limit. If the CPU maintains low %, then you should be fine.
With that said, you can create more than 8 routed ports in the router w/o receiving an error in the CLI. I was able to create 15 routed ports in the lab w/o seeing any performing issue nor receiving an error in the CLI.
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