Are besclients still downloading the relays.dat file from the BigFix server and is the update every 6 hours if there is one? If not still supported how are endpoints updated of the existing relays? I am reading ICMP Traffic Technical Details ( http://support.bigfix.com/bes/misc/besclient_icmp.html ) and the below automatic relay selection references this file.
During automatic relay selection, the BES Client sends out rounds of ICMP traffic with a constant TTL in each round. Each round of will send an ICMP packet to every BES Relay (BES Relays are listed in the ActionSite’s Relay.dat file).