A Commands

This chapter describes the Cisco NX-OS Enhanced Interior Gateway Routing Protocol (EIGRP) commands that begin with A.

address-family (EIGRP)

To configure an address family for the Enhanced Interior Gateway Routing Protocol (EIGRP), use the address-family command. To remove an address family, use the no form of this command.

address-family ipv4 unicast

no address-family ipv4 unicast

Syntax Description

ipv4

Specifies the IPv4 address family.

unicast

Specifies unicast address support.


Command Default

None

Command Modes

Command HistoryRouter configuration mode
Address family configuration mode

Release
Modification

5.0(3)N1(1)

This command was introduced.


Usage Guidelines

This command requires the LAN Base Services license.

Examples

This example shows how to set the IPv4 unicast address family for an EIGRP instance: 

switch(config)# router eigrp 201 

switch(config-router)# address-family ipv4 unicast

switch(config-router)#

 
   
 
    
   
 Related Commands
 
   
 
    
 
      
      
      
 
        
        

          Command 
        
 		 
        
        

          Description 
        
 		 
      
 
      
 
       
 default-information 
 		 
       
 Controls the distribution of a default route. 
 		 
      
 
      
 
       
 default-metric 
 		 
       
 Configures the default metric for routes redistributed into EIGRP. 
 		 
      
 
      
 
       
 distance 
 		 
       
 Configures the administrative distance. 
 		 
      
 
      
 
       
 maximum-paths 
 		 
       
 Configures the maximum number of equal-cost paths. 
 		 
      
 
      
 
       
 redistribute 
 		 
       
 Configures route redistribution for EIGRP. 
 		 
      
 
      
 
       
 router-id 
 		 
       
 Configures the router ID. 
 		 
      
 
      
 
       
 show ip eigrp  
 		 
       
 Displays EIGRP information. 
 		 
      
 
      
 
       
 timers 
 		 
       
 Configures the EIGRP timers. 
 		 
      
 
      
    
 
   
 
   
 
   
 
 
     
    
    
   
 authentication key-chain (EIGRP) 
 
    
   
 To enable authentication for the Enhanced Interior Gateway Routing Protocol (EIGRP) packets and to specify the set of keys that can be used on an interface, use the authentication key-chain command. To prevent authentication, use the no form of this command. 
 
    
   
authentication key-chain name-of-chain 
 
    
   
no authentication key-chain name-of-chain 
 
    
   
 Syntax Description
 
   
 
    
 
      
      
      
 
       
 name-of-chain 
 		 
       
 Group of keys that are valid. 
 		 
      
 
      
    
 
   
 
   
 
   
 
 
    
   
 Command Default 
 
    
   
 No authentication is provided for EIGRP packets. 
 
    
   
 Command Modes 
 
    
   
 Command HistoryRouter configuration mode
Address family configuration mode
Router VRF configuration mode
 
   
 
    
 
      
      
      
 
        
        

          Release 
        
 		 
        
        

          Modification 
        
 		 
      
 
      
 
       
 5.0(3)N1(1) 
 		 
       
 This command was introduced. 
 		 
      
 
      
    
 
   
 
   
 
   
 
 
    
   
 Usage Guidelines 
 
    
   
 Set the authentication mode using the authentication mode command in VRF configuration mode. You must separately configure a key chain using the key-chain command to complete the authentication configuration for an interface. 
 
    
   
 This command requires the LAN Base Services license. 
 
    
   
 Examples 
 
    
   
 This example shows how to configure the interface to accept and send any key that belongs to the key-chain trees: 
 
    
   
 
    
switch(config)# router eigrp 209

 
   
 
    
   
 
    
switch(config-router)# vrf red

 
   
 
    
   
 
    
switch(config-router-vrf)# authentication key-chain trees

 
   
 
    
   
 Related Commands
 
   
 
    
 
      
      
      
 
        
        

          Command 
        
 		 
        
        

          Description 
        
 		 
      
 
      
 
       
 authentication mode (EIGRP) 
 		 
       
 Sets the authentication mode for EIGRP in a VRF. 
 		 
      
 
      
 
       
 ip authentication key-chain eigrp 
 		 
       
 Enables authentication for EIGRP and specifies the set of keys that can be used on an interface. 
 		 
      
 
      
 
       
 key-chain 
 		 
       
 Creates a set of keys that can be used by an authentication method. 
 		 
      
 
      
 
       
 show ip eigrp  
 		 
       
 Displays EIGRP information. 
 		 
      
 
      
    
 
   
 
   
 
   
 
 
     
    
    
   
 authentication mode (EIGRP) 
 
    
   
 To specify the type of authentication used in the Enhanced Interior Gateway Routing Protocol (EIGRP) packets, use the authentication mode command. To remove authentication, use the no form of this command. 
 
    
   
authentication mode md5 
 
    
   
no authentication mode md5 
 
    
   
 Syntax Description
 
   
 
    
 
      
      
      
 
       
 md5 
 		 
       
 Specifies Message Digest 5 (MD5) authentication. 
 		 
      
 
      
    
 
   
 
   
 
   
 
 
    
   
 Command Default 
 
    
   
 None 
 
    
   
 Command Modes 
 
    
   
 Command HistoryRouter configuration mode
Address family configuration mode
VRF configuration mode
 
   
 
    
 
      
      
      
 
        
        

          Release 
        
 		 
        
        

          Modification 
        
 		 
      
 
      
 
       
 5.0(3)N1(1) 
 		 
       
 This command was introduced. 
 		 
      
 
      
    
 
   
 
   
 
   
 
 
    
   
 Usage Guidelines 
 
    
   
 This command requires the LAN Base Services license. 
 
    
   
 Examples 
 
    
   
 This example shows how to configure the interface to use MD5 authentication: 
 
    
   
 
    
switch(config)# router eigrp 209

 
   
 
    
   
 
    
switch(config-router)# vrf red

 
   
 
    
   
 
    
switch(config-router-vrf)# authentication mode md5

 
   
 
    
   
 
    
switch(config-router-vrf)#

 
   
 
    
   
 
    
 
   
 
    
   
 Related Commands
 
   
 
    
 
      
      
      
 
        
        

          Command 
        
 		 
        
        

          Description 
        
 		 
      
 
      
 
       
 authentication key-chain eigrp 
 		 
       
 Enables authentication for EIGRP and specifies the set of keys that can be used on an interface. 
 		 
      
 
      
 
       
 ip authentication mode eigrp 
 		 
       
 Configures the authentication mode for EIGRP on an interface. 
 		 
      
 
      
 
       
 key chain 
 		 
       
 Creates a set of keys that can be used by an authentication method. 
 		 
      
 
      
 
       
 show ip eigrp 
 		 
       
 Displays EIGRP information. 
 		 
      
 
      
    
 
   
 
   
 
   
 
 
    
     
    
    
   
 autonomous-system 
 
    
   
 To configure the autonomous system (AS) number for an Enhanced Interior Gateway Routing Protocol (EIGRP) address family, use the autonomous-system command. To revert to default, use the no form of this command. 
 
    
   
autonomous-system as-number 
 
    
   
no autonomous-system [as-number] 
 
    
   
 Syntax Description
 
   
 
    
 
      
      
      
 
       
 as-number 
 		 
       
 Autonomous system number. The range is from 1 to 65535. 
 		 
      
 
      
    
 
   
 
   
 
   
 
 
    
   
 Command Default 
 
    
   
 None 
 
    
   
 Command Modes 
 
    
   
 Command HistoryAddress family configuration mode
 
   
 
    
 
      
      
      
 
        
        

          Release 
        
 		 
        
        

          Modification 
        
 		 
      
 
      
 
       
 5.0(3)N1(1) 
 		 
       
 This command was introduced. 
 		 
      
 
      
    
 
   
 
   
 
   
 
 
    
   
 Usage Guidelines 
 
    
   
 Use the autonomous-system command to set a common AS number for all EIGRP instances in an address family. 
 
    
   
 This command requires the LAN Base Services license. 
 
    
   
 Examples 
 
    
   
 This example shows how to set an AS number for EIGRP for IPv4 unicast: 
 
    
   
 
    
switch(config)# router eigrp 201

 
   
 
    
   
 
    
switch(config-router)# address-family ipv4 unicast

 
   
 
    
   
 
    
switch(config-router-af)# autonomous-system 64496

 
   
 
    
   
 
    
switch(config-router-af)#

 
   
 
    
   
 
    
 
   
 
    
   
 Related Commands
 
   
 
    
 
      
      
      
 
        
        
 
         Command 
        
 		 
        
        
 
         Description 
        
 		 
      
 
      
 
       
 address-family (EIGRP) 
 		 
       
 Enters the address family configuration mode for EIGRP.