I have a Nexus 7010 running version 5.0(3). I was testing its features and noticed that a SVI for a vlan is not "up" unless there is a node in the vlan. There isn't any nondefault VDC (not licensed for it) and the VRF is 'default'. The SVI looks like this:
ip address 192.168.169.1/24
Of course the vlan exists. If this were IOS, you would be able to ping 192.168.169.1, but this isn't IOS.
When I drop a node in vlan 77, then you can ping the node and the SVI.
I looked at the Cisco documentation but couldn't find anything mentioning this. I'm not sure if this good or bad, it is different and I am accustomed to just pinging a gateway SVI to see if a subnet should be up or not (without regards to weather or not there are nodes in the subnet).
So my question is: am I missing something, or is this just how it is and I need to get use to it?
Thanks for the reply, I'll check out autostate. The behavior I described can be seen on 4500s and 3750s, so I guess ymmv.
I believe 3750s and 4500s should exhibit the same behavior. Are you sure you did not have any ports (access or trunk) active when you verified the SVI state? Also there is an autostate exclude feature which allows you to selectively disable the autostate functionality for desired VLANs.