What is variance in EIGRP?

Table of Contents

Introduction. EIGRP provides a mechanism to load balance over unequal cost paths throungh Variance Command. Variance is a number (1 to 128), multiplied by the local best metric then includes the routes with the lesser or equal metric. The default Variance value is 1, which means equal-cost load balancing.

How is EIGRP metric calculated?

EIGRP uses these scaled values to determine the total metric to the network: metric = [K1 * bandwidth + (K2 * bandwidth) / (256 – load) + K3 * delay] * [K5 / (reliability + K4)]

What is the default metric for EIGRP?

EIGRP Default Metric Despite how flexible the cost calculation is, most implementations of EIGRP just rely on the default K-values for their metric. The default K-values consider only Bandwidth and Delay, and ignore Load and Reliability.

What is the variance command used for?

The variance command instructs the router to include routes with a metric less than n times the minimum metric (feasible distance) route for that destination. The variable n can take a value between 1 and 128. The default is 1, which means equal cost load balancing.

How do I change the k value in EIGRP?

You can configure this value by using the ‘delay’ command. EIGRP uses total delay in the metric calculation formula. Total delay is the sum of the delay received from the neighboring router and the delay configured on the interface.

What is EIGRP composite metric?

If you have two EIGRP routes to the same place, the one with the lowest composite metric wins. So basically, a composite metric is a number calculated based on a number of different components that determines route preference.

What is the EIGRP formula?

EIGRP Metric = 256*(Bandwidth + Delay) Bandwidth = 10000000/bandwidth(i), where bandwidth(i) is the least bandwidth of all outgoing interfaces on the route to the destination network represented in kilobits.

How do you calculate EIGRP metric and K values?

The formula we use for the metric calculation looks like this:

Metric = [K1*bandwidth + ((K2*bandwidth)/(256-load))+K3*delay]
Metric = Metric*[K5/(reliability+K4)]
Metric = bandwidth (slowest link) + delay (sum of delays)
Metric = (107 / minimum bandwidth) * 256 + (sum of delays) * 256.

What is K value in EIGRP?

K values are integers from 0 to 128; these integers, in conjunction with variables like bandwidth and delay, are used to calculate the overall EIGRP composite cost metric.

What is the K value in EIGRP?

How do you fix a high variance?

You can reduce High variance, by reducing the number of features in the model. There are several methods available to check which features don’t add much value to the model and which are of importance. Increasing the size of the training set can also help the model generalise.

¿Cuáles son los ejemplos de configuración de EIGRP?

Ejemplo: Configurar EIGRP para IPv4 2. Números de sistema autónomo 2.1. ISP e Instituciones 3. El comando router de EIGRP 4. Id. de router EIGRP 5. Configuración de la ID del router EIGRP 5.1. Uso de la dirección de loopback como ID del router 5.2. Verificación del proceso EIGRP 6. El comando network 7. El comando network y la máscara wildcard 8.

¿Qué es el EIGRP para IPv4 y para qué sirve?

EIGRP para IPv4 utiliza la ID de router de 32 bits para identificar el router de origen para la redistribución de rutas externas. La necesidad de una ID de router es más evidente en el análisis de EIGRP para IPv6. Los routers Cisco derivan la ID del router sobre la base de tres criterios, en el siguiente orden de prioridad:

¿Qué es el EIGRP y para qué sirve?

¿Qué es la instancia EIGRP y cómo se crea?

A diferencia del método tradicional, la instancia EIGRP no se crea ni se inicia cuando se configura en el router: La instancia se creará cuando se configure la familia de direcciones y el número del sistema autónomo, por ejemplo: R1 (config-router)# address-family ipv4 unicast autonomous-system 1

What is variance in EIGRP?