Adj-5-resolve-req-fail Adj Resolve Request Failed For -

: If a packet needs to be forwarded but the switch doesn't have a MAC address for the destination IP in its ARP table, it tries to "resolve" it. If this fails (e.g., the device is offline or silent), the switch logs this error. Known Cisco Bugs

%ADJ-5-RESOLVE_REQ_FAIL error is a common Cisco IOS log message indicating that the switch failed to resolve a Layer 2 address (MAC) for a Layer 3 destination (IP) while trying to update the Cisco Express Forwarding (CEF) adjacency table. Spiceworks Community The "Long Story" (Why it happens) adj-5-resolve-req-fail adj resolve request failed for