EIGRP Configuration Part-2

 EIGRP Router ID:

It Can be any IP address except for and router ID will be the highest IP address of any loop- back interfaces. If there no loopback interfaces are configured, the router ID will be the highest IP address of the active local interface.

Router ID Configuration:

Router(config)#router eigrp 200
Router(config-router)#eigrp router-id

Remove Router ID:
Router(config-router)#no eigrp router-id

Configures the EIGRP hello time and Hold Time:

EIGRP advertises its complete information is when it discovers a new neighbor and forms an adjacency (neighbor ship) with it by the exchange of Hello packets. EIGRP participants  routers must also continue sending and receiving Hellos from their neighbors.

Router(config)#interface serial 0/0/1
Router(config-if)#ip hello-interval eigrp 200 10
Router(config-if)#ip hold-time eigrp 200 30


Router(config-if)#ipv6 hello-interval eigrp 200 10
Router(config-if)#ipv6 hold-time eigrp 200 40

EIGRP Auto-Summarization:

EIGRP by default  auto-summarize classful boundaries ,But no worries there are ways to make this work; it just doesn’t work by default. I will show you how to fix this by using no auto-summary command when we configure EIGRP.

Router(config-router)#no auto-summary

EIGRP Manual-Summarization:

Router(config)#interface fastethernet 0/0
Router(config-if)#ip summary-address eigrp 200 75

Equal-Cost Load Balancing:

EIGRP will do load-balance across both links automatically when they are of equal cost, but EIGRP can load balance across unequal cost links as well if we use the variance command. By default the variance metric is set to 1 ,That only equal cost links will load balance.

Router(config)#router eigrp 110
Router(config-router)#maximum-paths 5
Router(config)#ipv6 router eigrp 110
Router(config-rtr)#maximum-paths 5

Unequal-Cost Load Balancing:

Router(config)#router eigrp 110
Router(config-router)#variance n
Router(config)#ipv6 router eigrp 110
Router(config-rtr)#variance n

Bandwidth Use:

Router(config)#interface serial 0/0/0
Router(config-if)#bandwidth 256
Router(config-if)#ip bandwidth-percent eigrp 50 100
Router(config-if)#ipv6 bandwidth-percent eigrp
100 75

Verifying EIGRP:

No comments