GTM Monitor up and Down for HOP load-balancing

"The Hops load balancing mode is based on the traceroute utility, and tracks the number of intermediate system transitions (router hops) between a client LDNS and each data center. Hops mode selects a virtual server in the data center that has the fewest router hops from the Local DNS."

1) Your GTM LB method shouldn't really effect your health monitoring. What health monitor do you have for the generic GTM servers? You may want to do a tcpdump to see the behavior. And also possibly turn on GTM debug and look through "tail -f /var/log/gtm & "tail -f /var/log/ltm"

2) Are the GTM servers that are not under the LTM setup as a generic server?