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CCNA Routing and Switching Portable Command Guide: Enhanced Interior Gateway Routing Protocol (EIGRP)

Contents

  1. Configuring Enhanced Interior Gateway Routing Protocol (EIGRP) / EIGRP Auto-Summarization
  2. EIGRP Manual Summarization / Passive EIGRP Interfaces / Equal-Cost Load Balancing: Maximum Paths / Unequal-Cost Load Balancing: Variance
  3. Bandwidth Use / Authentication
  4. Verifying EIGRP / Troubleshooting EIGRP
  5. Configuration Example: EIGRP

Chapter Description

The excerpt from The CCNA Routing and Switching Portable Command Guide summarizes all CCNA certification-level Cisco IOS® Software commands, keywords, command arguments, and associated prompts for topics related to the Enhanced Interior Gateway Routing Protocol (EIGRP).
EIGRP Manual Summarization

EIGRP Manual Summarization

Router(config)#interface fastethernet 0/0

Enters interface configuration mode.

Router(config-if)#ip summary-address eigrp 100 10.10.0.0 255.255.0.0 75

Enables manual summarization for EIGRP autonomous system 100 on this specific interface for the given address and mask. An administrative distance of 75 is assigned to this summary route.


NOTE The administrative-distance argument is optional in this command. Without it, an administrative distance of 5 is automatically applied to the summary route.

Passive EIGRP Interfaces

Router(config)#router eigrp 110

Starts the EIGRP routing process.

Router(config-router)#network 10.0.0.0

Specifies a network to advertise in the EIGRP routing process.

Router(config-router)#passive-interface fastethernet 0/0

Prevents the sending of hello packets out the Fast Ethernet 0/0 interface. No neighbor adjacency will be formed.

Router(config-router)
#passive-interface default

Prevents the sending of hello packets out all interfaces.

Router(config)#no passive-
interface serial 0/0/1

Enables hello packets to be sent out interface Serial 0/0/1, thereby allowing neighbor adjacencies to form

Equal-Cost Load Balancing: Maximum Paths

Router(config)#router eigrp 100

Creates routing process 100

Router(config-router)#network 10.0.0.0

Specifies which network to advertise in EIGRP

Router(config-router)#maximum-paths 6

Set the maximum number of parallel routes that EIGRP will support to 6

Unequal-Cost Load Balancing: Variance

Router(config)#router eigrp 100

Creates routing process 100

Router(config-router)#network 10.0.0.0

Specifies which network to advertise in EIGRP

Router(config-router)#variance n

Instructs the router to include routes with a metric less than or equal to n times the minimum metric route for that destination, where n is the number specified by the variance command

3. Bandwidth Use / Authentication | Next Section Previous Section