F5 Troubleshooting:

# tmsh show /sys version
# tmsh show /net route
# tcpdump -ni 0.0 host 192.168.1.109 and port 80   -- tcpdump on all interfaces, filter on host and port
# bigstart status bigd   - The bigd monitor daemon provides system health checks. Impact of not running: Monitoring not available

The master control program daemon (MCPD) is the messenger service that allows two-way communication between userland processes and the Traffic Management Microkernel (TMM).
Impact of not running: No traffic management functionality; the system status cannot be retrieved or updated, and the system cannot be re-configured; other daemons will not be functional.

# tmsh list ltm pool webservers all-properties | more

# tmsh modify sys db bigd.debug value enable; tail -f /var/log/bigdlog; tmsh modify sys db bigd.debug value disable   - enable bigd debug, tail output, disable bigd debug