We are in the process of upgrading a network of 12 6509's from 12.2.18SXF5 to 12.2.33SXI1. So far we have upgraded 8 nodes, and everything has been running smooth.
But - yesterday I upgraded another node and got lots of problems. For example:
- I got HSRP flapping on physical interfaces and subinterfaces (not SVI's)
- The CPU util increased dramatically. Sometimes i couldn't even save the configuration file.
It seem like it has "calmed down" a bit now, but I am evaluating to downgrade back to 12.2.18SXF5.
1. Is it any issues with downgrading from 12.2.33 SXI to 12.2.18SXF5?
2. If we install a modular image - is the downgrade process more complex then?