Enrutamiento EIGRP métricas Neighbor Table

Posted on Actualizado enn

Información acerca EIGRP

Que son las métricas

Las métricas son valores que se dan a las rutas para poder saber cual es el mejor camino para llegar a un destino.

Las métricas en EIGRP se basan en la siguiente fórmula

 

Las constantes son valores que deben ser iguale en todos los routers que participan en este enlace.

CISCO prefiere esta representación de la fórmula y sus constantes

 

 

 

Neighbor Table

Esta tabla nos informa de los routers vecinos, o sea, la tabla que muestra los routers que están en el mismo AS y se interconectan mediante los Hellos

R1#sh ip eigrp neighbors
EIGRP-IPv4 Neighbors for AS(10)
H Address Interface Hold Uptime SRTT RTO Q Seq
 (sec) (ms) Cnt Num
1 192.168.1.2 Fa3/1 13 01:28:31 43 258 0 10
0 192.168.2.2 Fa2/0 12 02:21:03 108 648 0 13
R1#



R2#sh ip eigrp neighbors
EIGRP-IPv4 Neighbors for AS(10)
H Address Interface Hold Uptime SRTT RTO Q Seq
 (sec) (ms) Cnt Num
1 192.168.3.2 Fa3/0 13 00:02:15 56 336 0 11
0 192.168.2.1 Fa2/0 11 02:20:17 951 5000 0 18
EIGRP-IPv4 Neighbors for AS(20)
H Address Interface Hold Uptime SRTT RTO Q Seq
 (sec) (ms) Cnt Num
0 172.168.10.2 Fa3/1 11 00:11:17 1 3000 0 1
R2#

R3#sh ip eigrp neighbors
EIGRP-IPv4 Neighbors for AS(10)
H Address Interface Hold Uptime SRTT RTO Q Seq
 (sec) (ms) Cnt Num
1 192.168.3.1 Fa3/0 10 00:02:31 99 594 0 14
0 192.168.1.1 Fa3/1 14 01:28:04 52 312 0 19
EIGRP-IPv4 Neighbors for AS(30)
H Address Interface Hold Uptime SRTT RTO Q Seq
 (sec) (ms) Cnt Num
0 172.168.20.2 Fa0/0 10 00:06:43 1 3000 0 1
R3#

 

topology table

La tabla de topología muestra las rutas, las métricas y las interfaces.

Parece que el hecho que las interfaces esten en modo Passive, es una buena señal.

Los valores 30720/28160 son “the feasible distance” para 30720 y “the advertised distance” para 28160.

the feasible distance es la distancia desde tu red al destino.

the advertised distance es la distncia desde tu equipo hasta el destino.

 

R1#sh ip eigrp topology
EIGRP-IPv4 Topology Table for AS(10)/ID(10.10.20.1)
Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,
 r - reply Status, s - sia Status

P 192.168.3.0/24, 2 successors, FD is 30720
 via 192.168.1.2 (30720/28160), FastEthernet3/1
 via 192.168.2.2 (30720/28160), FastEthernet2/0
P 192.168.2.0/24, 1 successors, FD is 28160
 via Connected, FastEthernet2/0
P 10.20.20.0/24, 1 successors, FD is 156160
 via 192.168.2.2 (156160/128256), FastEthernet2/0
P 192.168.1.0/24, 1 successors, FD is 28160
 via Connected, FastEthernet3/1
P 10.20.10.0/24, 1 successors, FD is 156160
 via 192.168.2.2 (156160/128256), FastEthernet2/0
P 10.30.20.0/24, 1 successors, FD is 156160
 via 192.168.1.2 (156160/128256), FastEthernet3/1
P 10.10.20.0/24, 1 successors, FD is 128256
 via Connected, Loopback2
P 10.30.10.0/24, 1 successors, FD is 156160
 via 192.168.1.2 (156160/128256), FastEthernet3/1
P 10.10.10.0/24, 1 successors, FD is 128256
 via Connected, Loopback1



R2#sh ip eigrp topology
EIGRP-IPv4 Topology Table for AS(10)/ID(10.20.20.1)
Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,
 r - reply Status, s - sia Status

P 192.168.3.0/24, 1 successors, FD is 28160
 via Connected, FastEthernet3/0
P 192.168.2.0/24, 1 successors, FD is 28160
 via Connected, FastEthernet2/0
P 10.20.20.0/24, 1 successors, FD is 128256
 via Connected, Loopback2
P 192.168.1.0/24, 2 successors, FD is 30720
 via 192.168.2.1 (30720/28160), FastEthernet2/0
 via 192.168.3.2 (30720/28160), FastEthernet3/0
P 10.20.10.0/24, 1 successors, FD is 128256
 via Connected, Loopback1
P 10.30.20.0/24, 1 successors, FD is 156160
 via 192.168.3.2 (156160/128256), FastEthernet3/0
P 10.10.20.0/24, 1 successors, FD is 156160
 via 192.168.2.1 (156160/128256), FastEthernet2/0
P 10.30.10.0/24, 1 successors, FD is 156160
 via 192.168.3.2 (156160/128256), FastEthernet3/0
P 10.10.10.0/24, 1 successors, FD is 156160
 via 192.168.2.1 (156160/128256), FastEthernet2/0

EIGRP-IPv4 Topology Table for AS(20)/ID(10.20.20.1)
Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,
 r - reply Status, s - sia Status

P 172.168.10.0/24, 1 successors, FD is 28160
 via Connected, FastEthernet3/1

R3#sh ip eigrp topology
EIGRP-IPv4 Topology Table for AS(10)/ID(10.30.20.1)
Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,
 r - reply Status, s - sia Status

P 192.168.3.0/24, 1 successors, FD is 28160
 via Connected, FastEthernet3/0
P 192.168.2.0/24, 2 successors, FD is 30720
 via 192.168.1.1 (30720/28160), FastEthernet3/1
 via 192.168.3.1 (30720/28160), FastEthernet3/0
P 10.20.20.0/24, 1 successors, FD is 156160
 via 192.168.3.1 (156160/128256), FastEthernet3/0
P 192.168.1.0/24, 1 successors, FD is 28160
 via Connected, FastEthernet3/1
P 10.20.10.0/24, 1 successors, FD is 156160
 via 192.168.3.1 (156160/128256), FastEthernet3/0
P 10.30.20.0/24, 1 successors, FD is 128256
 via Connected, Loopback2
P 10.10.20.0/24, 1 successors, FD is 156160
 via 192.168.1.1 (156160/128256), FastEthernet3/1
P 10.30.10.0/24, 1 successors, FD is 128256
 via Connected, Loopback1
P 10.10.10.0/24, 1 successors, FD is 156160
 via 192.168.1.1 (156160/128256), FastEthernet3/1

EIGRP-IPv4 Topology Table for AS(30)/ID(10.30.20.1)
Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,
 r - reply Status, s - sia Status

P 172.168.20.0/24, 1 successors, FD is 28160
 via Connected, FastEthernet0/0

Routing Table
Fuente métricas y imágenes: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_eigrp/configuration/15-sy/ire-15-sy-book/ire-wid-met.html

Imágen formula y constantes todo junto EIGRP: http://routeleak.com/wp-content/uploads/2015/06/EIGRP-Composite-Metric-Formula.jpg

Info de EIGRP en interfaces modo passive: https://www.cisco.com/c/en/us/support/docs/ip/enhanced-interior-gateway-routing-protocol-eigrp/13675-16.html

AUTOR: David Perez Martorell davidperezmartorell@gmail.com

Nota: Si te sirvió lo que postié, te pido 2 segundos para contestar las encuestas que figuran abajo.

Gracias!

Anuncios

Responder

Introduce tus datos o haz clic en un icono para iniciar sesión:

Logo de WordPress.com

Estás comentando usando tu cuenta de WordPress.com. Cerrar sesión /  Cambiar )

Google+ photo

Estás comentando usando tu cuenta de Google+. Cerrar sesión /  Cambiar )

Imagen de Twitter

Estás comentando usando tu cuenta de Twitter. Cerrar sesión /  Cambiar )

Foto de Facebook

Estás comentando usando tu cuenta de Facebook. Cerrar sesión /  Cambiar )

Conectando a %s