We have a Cisco C891F-K9 [c800-universalk9-mz.SPA.153-3.M3.bin] <advipservices> Router with 8 Gigabit Ethernet ports, we were told by cisco that these interfaces could assigned IP addresses on Layer 3.
However when I try to configure them i get "% IP addresses may not be configured on L2 links." I have tried to apply "No Switchport" on the interface but ;
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Most 800 series built-in Ethernet interfaces, are as Leo notes, only L2.
Yes, as you asked, you'll need to create VLANs (SVIs) for them, if you want them to have L3.
How to do that is pretty simple. Define a VLAN for each Ethernet port you want to have a L3 IP. Assign just one Ethernet port to the VLAN. Then define a VLAN interface for the same VLAN and assign it an IP.
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