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CISCO REFERENCE ARTICLES

CISCO CLI ERROR MESSAGES

 

CLI TIPS AND TRICKS

 

CISCO ROUTER LOAD BALANCING MECHANISMS

 

UNDERSTANDING CISCO DYNAMIC TRUNKING PROTOCOL

 

DISABLING DTP - SWITCHPORT NONEGOTIATE

CLI error messages on a Cisco device often appear cryptic and the exact reason for an error message may not be immediately clear. Click on any of error messages below for details about the message including common causes and resolutions for these messages.

General Error Messages

% Ambiguous command

% Invalid input detected at '^' marker

Interface Configuration Error Messages

% Bad Mask /xx for address X.X.X.X

% X.X.X.X overlaps with GigabitEthernet0/1

Command rejected: Conflict between 'nonegotiate' and 'dynamic' status

% Configuration of multiple subinterfaces of the same main interface with the same VID is not permitted

% Configuring IP routing on a LAN subinterface is only allowed if that subinterface is already configured as part of a VLAN

Route Configuration Error MEssages

% Inconsistent address and mask

% Invalid next hop address (it's this router)