Adj-5-resolve-req-fail Adj Resolve Request Failed For =link= Instant
show ip interface brief | include <interface> Ensure the output interface is up/up . Also verify no input errors or CRC errors that could corrupt ARP.
Before diving into the error, it is crucial to understand what "ADJ" refers to. In Cisco's architecture, the is part of Cisco Express Forwarding (CEF). While traditional routing tables determine the path (next-hop IP), CEF adjacencies resolve the rewrite information needed to forward a packet out of a specific interface (Layer 2 MAC address, VLAN tags, etc.). adj-5-resolve-req-fail adj resolve request failed for
The widely accepted fix to stop the log flood and restore stability is to disable neighbor resolution optimization in the global configuration: Switch(config)# no ip cef optimize neighbor resolution Use code with caution. Copied to clipboard show ip interface brief | include <interface> Ensure
%ADJ-5-RESOLVE-REQ-FAIL: adj resolve request failed for 192.168.1.1 %CEF-3-CEFHARDWAREDROP: FIB TCAM entry 10.0.0.0/24 points to drop adjacency In Cisco's architecture, the is part of Cisco
Once you've diagnosed the likely cause, apply these targeted fixes.
The Cisco syslog error occurs when a network device fails to resolve the Layer 2 address (MAC address) for a specific Layer 3 destination (IP address). While typically non-disruptive to overall traffic, this error can flood system logs and may indicate underlying Cisco IOS software bugs . Understanding the Error
A device (like a laptop or server) shutting down or rebooting can sometimes trigger a final resolution failure log as the entry is purged. How to Fix ADJ-5-RESOLVE_REQ_FAIL
