Omniswitch 6850 - DHCP - ip helper issues

[devnull]

Nobody can help you in this case.
With the BPSW Account you should be able to get the downloads, otherwise use google.
Every Update will requirte a reboot and every upgrade poses a risk.
In general you should have a spare switch to "try" or prepare and replace.
You should have some disaster recovery scenario, as a Powersupply/Fan/Switch may break randomly.
LS6224 is end of everything like ages ago.