It would be useful to have a special type of IP address, a virtual address that can be allocated to more than one device.
Let's say for example I have a couple of routers running HSRP and have a shared virtual IP. At the moment I can create a cluster device representing the virtual IP feature of that device, but that isn't ideal for a couple of reasons:
- since it isn't really a cluster as such I need to invent a name and generally represent a device in IPAM that isn't really in my network just so I can have that virtual IP allocated somewhere
- devices are expensive! These pretend cluster devices really eat up our device entitlement for not much real value
There's probably other situations where virtual IPs would be useful, e.g. anycast deployments?
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