Standby Cluster member causing performance issues
We have a pair of watchguard firewalls in active/standby mode. We are trying to figure out a strange behavior. We made some changes to the external interface, instead of the having our colo connection (2 of them) go into two switches and then have the each watchguard plug into the the switch so it was one internet connection into one switch and one watchguard into that swicth as well. That worked great for 10 years, but we figured it was time to replace the switches so we plugged the internet connections into the the firewalls directly a one to one relationship. For about an hour that seemed to work, until the packets were being dropped. Our internal network servers could connect to internet sites, but then could not, it got worse when we did a failover to the second unit thinking the master was the problem . so we failed back and then unplugged the second unit and everything started to work normally again. Any ideas what may cause this.
One last thing the trusted interface we moved to the newer switches that we had for about 5 years. I just do not know where to start the logs looked normal, no werrors on the switches.