Eduroam & FreeRadius not working so well

[Mike Diggins]

I'm running FreeRadius 2.1.12 on RedHat 6 as an Eduroam proxy server and 
having problems. My cisco wireless controllers are constantly failing back 
and forth between the primary and secondary systems. My logs show these 
errors when it happens:

Dec  4 19:12:18 server radiusd[32588]: Internal sanity check failed for 
child state
Dec  4 19:12:18 server radiusd[32588]: Reply from home server x.x.x.x port 
1812  - ID: 210 arrived too late for request 76479. Try increasing 
'retry_delay' or 'max_request_time'
Dec  4 19:13:18 server radiusd[32588]: Discarding duplicate request from 
client ct5508 port 32770 - ID: 148 due to unfinished request 76495
Dec  4 19:13:26 server radiusd[32588]: Discarding duplicate request from 
client ct5508 port 32770 - ID: 148 due to unfinished request 76495
Dec  4 19:13:34 server radiusd[32588]: Discarding duplicate request from 
client ct5508 port 32770 - ID: 148 due to unfinished request 76495
Dec  4 19:13:41 server radiusd[32588]: Internal sanity check failed for 
child state
Dec  4 19:13:41 server radiusd[32588]: Reply from home server x.x.x.x port 
1812  - ID: 102 arrived too late for request 76495. Try increasing 
'retry_delay' or 'max_request_time'
Dec  4 19:13:42 server radiusd[32588]: Discarding duplicate request from 
client ct5508 port 32770 - ID: 148 due to unfinished request 76495

I'm look for some advice as to what timeouts to adjust that might help 
with the errors. I didn't want to start changing retry_delay or 
max_request_time without some advice first. Any suggestions? I have no 
control over the Home Servers or how long a request takes to complete and 
I don't know what's causing the sanity check failure!?

-Mike