Hello,
Intermittent ping response between VTP Server and Firepower FTD device. Core switch vlan interfaces configured for vlan10 and vlan20, and switchport trunk allow vlan10 and vlan20 via direct layer-3 Firepower Inside-interface Sub-interface vlan10 and vlan20 connection. So to be clear, vlan10 is in the network 10.10.10.0/25 has an IP-range 1-126, and vlan20 is in the network 10.10.10.128/25 has an IP-range 129-254. At the Core switch a wildcard subnet mask 0.0.0.0 0.0.0.0 10.10.10.124 has been configure that points directly to vlan10 default IP 10.10.10.124. Pings back to remote-LAN works great up to vlan10 IP-range 1-26; however, ping responses for the vlan20 upper subnet IP-range 129-254 drops out incredibly with only one or two IP ping responses reaching the remote LAN. Note, ACLs and OSPF-routing are applicable on Firepower; but no NAT applied. Any helpful hints would be appreciated,
