yum-mirror directive for up2date

[Jorge Fábregas]

Hello all,

Could someone please explain me (or poing me to the right direction) on how 
the yum-mirror directive on /etc/sysconfig/rhn/sources really works?  Let say 
I have 4 mirrors for my main updates repository.  How is that up2date will 
cycle thru these 4? Is there a timeout? If a certain site doesn't respond in 
certain time..will it try the next one on the list? How much time is this? 
Does it cycle thru them in alphabetic order? If it connects to the first 
server successfully and then 5 minutes later it looses the connection (they 
may be rebooting the server) does up2date will fail? or try the next one?  
 
Thanks in advance,
Jorge