[RADIATOR] AuthBy ROUNDROBIN failover behavior

[Andrew Clark]

Hello,

I'm seeking some clarification on the failover behavior of AuthBy
ROUNDROBIN and how to read the logs when servers are marked dead.  I
have three hosts in the round-robin pool (via a round-robin DNS host
name) and I can see that requests are being distributed correctly to
all three.  What is unclear is the meaning of the logs when a server
is marked out.  The three servers are of course at three different IP
addresses, but I only see log messages about one of three IP addresses
being marked down:

Tue Oct 12 16:14:52 2010: INFO: AuthRADIUS: No reply after 3
retransmissions to 134.84.119.107:1836 for foo  (). Now have 1
consecutive failures over 0 seconds. Backing off for 300 seconds
Tue Oct 12 16:14:52 2010: INFO: AuthROUNDROBIN: Retry 1,
firstHostTried 0, lastHostTried 0
Tue Oct 12 16:14:52 2010: WARNING: AuthROUNDROBIN: Request was tried
for 1 times. All alive server from the RoundRobin list were tried.
Tue Oct 12 16:14:52 2010: INFO: AuthRADIUS could not find a working
host to forward to. Ignoring
Tue Oct 12 16:14:53 2010: INFO: AuthRADIUS: No reply after 3
retransmissions to 134.84.119.107:1836 for foo  (171). Now have 1
consecutive failures over 0 seconds. Backing off for 300 seconds
Tue Oct 12 16:14:53 2010: INFO: AuthROUNDROBIN: Retry 1,
firstHostTried 0, lastHostTried 0
Tue Oct 12 16:14:53 2010: WARNING: AuthROUNDROBIN: Request was tried
for 1 times. All alive server from the RoundRobin list were tried.

-- 
Andrew D. Clark
Network Operations Engineer
University of Minnesota, Networking/Telecom Services
2218 University Ave SE
Minneapolis, MN 55414-3029
Phone: 612-626-4880