What did the device change its IP address from? And to?
Is the device obtaining its IP address via DHCP? If so, did you have a DHCP server running on your 6500? Or were you running the "IP Helper" command to forward DHCP elsewhere?
The N7K with NXOS doesn't run a DHCP server like other IOS devices can, so it can't have allocated the IP address to your device. There must be some other underlying cause. Do you have DHCP snooping configured on the N7K?
Do you have the layer 3 level on the N7k configured corrcetly?
Part of the DHCP forward/request is to identify the subnet the request is coming from - so the DHCP server knows which pool to allocate from - if you have mis-configured the layer 3 interface on the N7K with the wrong mask (it looks like you've got the correct subnet, at least), then the DHCP server may have been massively confused, and the Sun device may have gotten itself the wrong subnet mask.
Check the layer 3 configuration on your N7K for the VLAN concerned, and make sure it's correct.
Just out of interest - you *do* have the "feature dhcp" command set on the N7K, don't you? Grasping at straws - I can't see anything in the config (or know of anything in NXOS) which would change the DHCP reply like that.
Are you 100% sure of your DHCP server configuration?
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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