Since IOS 15, EIGRP has a new method of configuration called named mode EIGRP. With the “classic” version of EIGRP that we used before IOS 15 we configured EIGRP globally and some other things (like authentication) on the interfaces. With named mode EIGRP, we do everything globally.
If you try to configure EIGRP on a IOS 15.x router you will see this:
R1(config)#router eigrp ?
<1-65535> Autonomous System
WORD EIGRP Virtual-Instance Name
Instead of an AS number we can also choose a name. Let’s try this, I’ll use two routers for this demonstration:
Let’s start with R1:
R1(config)#router eigrp MY_NAME
R1(config-router)#?
Router configuration commands:
address-family Enter Address Family command mode
default Set a command to its defaults
exit Exit from routing protocol configuration mode
no Negate a command or set its defaults
service-family Enter Service Family command mode
shutdown Shutdown this instance of EIGRP
The configuration is now done using an address-family. Let’s select it:
R1(config-router)#address-family ?
ipv4 Address family IPv4
ipv6 Address family IPv6
EIGRP named mode covers both IPv4 and IPv6. Let’s try IPv4:
R1(config-router)#address-family ipv4 autonomous-system 12
This is where I configure everything. For example advertising a network:
R1(config-router-af)#network 192.168.12.0
Everything that used to be configured on the interface is now under the same global configuration:
R1(config-router-af)#af-interface FastEthernet 0/0
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
Let’s try authentication:
Hi William,
Under topology base you will find commands that have to do with the EIGRP topology table. Stuff like redistribution, filtering, etc. Here’s an overview of all commands:
... Continue reading in our forumHi Lagapides ,
Thanks …Well understand this explanation…
Hello Vinod
The main differences between named and classic modes are the way in which they are implemented (globally for named while both globally and in interface mode for classic) as well as the addition of a sixth K value for the metric.
On the back end, that is, concerning the way that the routers interpret and operate in EIGRP, very little has changed. So a named mode EIGRP router can communicate with a classic EIGRP router. Since you configure the AS number under the EIGRP name configuration, if the AS is the same, they will communicate.
Now the only re
... Continue reading in our forumHello Network
EIGRP named mode supports what is known as the Wide Metrics feature. This feature supports 64-bit metric calculations as opposed to EIGRP classic mode that use 32-bit calculations. This results in varying metric values between the two.
Wide metrics was introduced in order to accommodate high-bandwidth interfaces and Ethernet channels. The increase in available speeds has resulted in incorrect or inconsistent routing behavior with the classic EIGRP routing metrics. The lowest delay that can be configured for an interface is 10 microseconds. As a
... Continue reading in our forumHi Rene and staff
i just look at EIGRP named to configure a lab in another lesson
So i explore the commands of the configuration modes; in the labs i did, i only used the topology mode base
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I tried to test (just for fun) the command with EIGRP that i suppose to set Multi-Topology Routing//cdn-forum.networklessons.com/uploads/default/original/2X/c/caea5318bdc479a90f5e217502cbdd6967531566.jpeg
As you see, IOS answer “VIDEO does not exist”
... Continue reading in our forumCould you give me