You can use this command to extend the
			validity of an expired key to ensure a smooth key rollover for the processing of a
			received packet. You can use this command to decrease the activation time of a new key
			so that a received packet can be authenticated with the new key. A longer accept
			tolerance period can reduce security if an old key was exposed.
	 - 
				Enter global configuration
					mode.
				
					device# configure terminal
				 
			 - 
				Enter keychain configuration
					mode.
				
					device(config)# keychain keychain1
				 
				This example enters configuration mode for key chain 1.
			 - 
				Configure the accept tolerance. 
				
					device(config-keychain1)# accept-tolerance 500
				 
				This example configures an
					accept tolerance of 500 seconds in key chain 1. The default is 600 seconds.
					Valid values range from 0 to 600.
			 
 
	 Example
 
		The following example summarizes the commands in this procedure.
			device# configure terminal
device(config)# keychain keychain1
device(config-keychain1)# accept-tolerance 500