Counts DHCP-related frames that were simply forwarded through the switch as normal traffic rather than being intercepted and relayed, because they were already valid and didn't require relay processing. This distinguishes 'passed through untouched' traffic from 'actively relayed' traffic, which helps an admin understand how much DHCP-like traffic on a port isn't actually going through the relay's option-82 insertion logic at all. Traffic between two directly-connected DHCP-aware devices that don't need option-82 tagging would increment this counter instead of L2Relayed.