Submodos de configuración de EIGRP Named

Al momento de utilizar EIGRP Named, es necesario tener en cuenta que los parámetros que antes ingresabamos en diversos modos de configuración, ahora se realizan bajo el modo de protocolo, por lo tanto, es necesario tener en cuenta que dentro de EIGRP nombrado existen varios submodos, los cuales son:

    • Modo de configuración de address-family
    • Modo de configuración de interfáz en address-family
    • Modo de configuración de topología en address-family

El primero es donde se definen los parámetros básicos del protocolo, y podemos encontrar comandos como:

  • af-interface
  • eigrp
  • metric
  • neighbor
  • network
  • topology

Por lo tanto, acá podemos activar el protocolo en las interfaces con el comando network, definir lo vecinos, la métrica y entrar a la subconfiguración de address-family interface y address-family topology.

R1(config)#router eigrp test 
R1(config-router)#address-family ipv4 unicast autonomous-system 10 
R1(config-router-af)#?
Address Family configuration commands:
  af-interface         Enter Address Family interface configuration
  default              Set a command to its defaults
  eigrp                EIGRP Address Family specific commands
  exit-address-family  Exit Address Family configuration mode
  help                 Description of the interactive help system
  maximum-prefix       Maximum number of prefixes acceptable in aggregate
  metric               Modify metrics and parameters for address advertisement
  neighbor             Specify an IPv4 neighbor router
  network              Enable routing on an IP network
  no                   Negate a command or set its defaults
  shutdown             Shutdown address family
  timers               Adjust peering based timers
  topology             Topology configuration mode

R1(config-router-af)#
R1(config-router-af)#network 192.168.10.1 0.0.0.0
R1(config-router-af)#neighbor 192.168.10.2 f0/0 
R1(config-router-af)#metric weights 0 1 0 1 0 0 0 
R1(config-router-af)#eigrp router-id 1.1.1.1 

En submodo de configuración de interfaz, encontramos:

  • authentication
  • bandwidth-percent
  • hello-interval
  • hold-time
  • next-hop-self
  • passive-interface
  • split-horizon
  • summary-address
R1(config-router-af)#af-interface default 
R1(config-router-af-interface)#passive-interface 
R1(config-router-af-interface)#exit-af-interface 
R1(config-router-af)#af-interface f0/0
R1(config-router-af-interface)#?
Address Family Interfaces configuration commands:
  authentication      authentication subcommands
  bandwidth-percent   Set percentage of bandwidth percentage limit
  bfd                 Enable Bidirectional Forwarding Detection
  dampening-change    Percent interface metric must change to cause update
  dampening-interval  Time in seconds to check interface metrics
  default             Set a command to its defaults
  exit-af-interface   Exit from Address Family Interface configuration mode
  hello-interval      Configures hello interval
  hold-time           Configures hold time
  next-hop-self       Configures EIGRP next-hop-self
  no                  Negate a command or set its defaults
  passive-interface   Suppress address updates on an interface
  shutdown            Disable Address-Family on interface
  split-horizon       Perform split horizon
  summary-address     Perform address summarization

R1(config-router-af-interface)#no passive-interface 
R1(config-router-af-interface)#authentication mode hmac-sha-256 password
R1(config-router-af-interface)#authentication key-chain key 
R1(config-router-af-interface)#no split-horizon 
R1(config-router-af-interface)#summary-address 10.10.0.0/16 
R1(config-router-af-interface)#hello-interval 3 
R1(config-router-af-interface)#hold-time 9

Como podemos apreciar, EIGRP Named soporta autenticación usando el hash SHA256, a diferencia del modo clásico, que solo soporta MD5, además, que para configurar el passive-interface en todas las interfaces, es necesario ingresar al submodo af-interfaces default.

En la configuración de topología podemos encontrar:

  • auto-summary
  • distance
  • distribute-list
  • offset-list
  • redistribute
  • variance
R1(config-router-af)#topology base
R1(config-router-af-topology)#?
Address Family Topology configuration commands:
  auto-summary         Enable automatic network number summarization
  default              Set a command to its defaults
  default-information  Control distribution of default information
  default-metric       Set metric of redistributed routes
  distance             Define an administrative distance
  distribute-list      Filter entries in eigrp updates
  eigrp                EIGRP specific commands
  exit-af-topology     Exit from Address Family Topology configuration mode
  maximum-paths        Forward packets over multiple paths
  metric               Modify metrics and parameters for advertisement
  no                   Negate a command or set its defaults
  offset-list          Add or subtract offset from EIGRP metrics
  redistribute         Redistribute IPv4 routes from another routing protocol
  snmp                 Modify snmp parameters
  summary-metric       Specify summary to apply metric/filtering
  timers               Adjust topology specific timers
  traffic-share        How to compute traffic share over alternate paths
  variance             Control load balancing variance

R1(config-router-af-topology)#maximum-paths 20
R1(config-router-af-topology)#variance 2
R1(config-router-af-topology)#distance 80 172.16.0.0 0.0.0.255
R1(config-router-af-topology)#redistribute ospf 1 metric 1000 500 255 1 1500

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