Things to consider when replacing a 6503e with 4507e Sup 8

[Raydar]

We're planning to replace a 6503e with 4507e Sup 8, and looking to any gotchas on config and setup. I know that's a very generic question, but was wondering if I could get some help from community identifying any possible issues, or areas to look into before the replacement.

[Joseph W. Doherty]

Getting licenses applied, can be a bit more involved on the sup8.

If you have dual sup8s, I believe the reload command will just bounce the active sup.

ISSU is an interesting feature on the sup8, but it can be slow to work through.

Later switches like the sup8 implicitly trust ToS when QoS is active.  Also, the QoS features and configuration differ between the 6500 and sup8.

Sup8 ports are 10g, even when running at gig.

[Raydar]

Thank you for that. Is there any recommendation for IOS ver?