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Getting the below error, when trying to configure the ip address 254.63.0.1 as an SVI.

Switch(config)#interface vlan 254

Switch(config-if)#ip address 254.63.0.1 255.255.0.0

Not a valid host address - 254.63.0.1

Switch(config-if)#

Not sure what am I doing wrong? Or is this some special ip address?

1 Answer 1

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240.0.0.0/4 is reserved by ARIN (SPECIAL-IPV4-FUTURE-USE-IANA-RESERVED). Likely, the switch is rejecting that address because it's part of the pre-1993 class E address range. Many hosts and devices reject that address range as source and even as destination address.

https://search.arin.net/rdap/?query=254.63.0.1

You cannot just use IP addresses unless you are either explicitly entitled to or they are free to use privately (esp. RFC 1918: 10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16).

Of course, you can do what you want inside your own, private network but any address collision will prevent proper routing with an Internet connection.

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