This value is a running counter of how many DHCP or BOOTP frames this relay agent entry has transmitted, meaning forwarded onward, since the counter last reset. An admin monitors this counter to confirm the relay agent is actively forwarding client requests, since a counter that never increases despite known DHCP client activity would point to a relay misconfiguration. For example, comparing this transmit counter against cxCfgDhcpRAStatRx over time helps the admin verify DHCP traffic is flowing in both directions as expected.