Re: EIGRP Named configuration

On Sat, Jan 9, 2010 at 10:51, Miroslav Kosut <miroslav.kosut_at_me.com> wrote:
> Hello people,
>
> does anybody know if I have to practise EIGRP Named-configuration (router eigrp
> virtual-instance-name)?

While the feature itself is rather fan and great improvement to what
we had before when it came to EIGRP and multi-af configuration, this
is something you don't have to worry about in the lab. This was ported
from "high-end" platforms to IOS 15 and is not available in 12.4T,
which is used in the lab according to Cisco website.

Think of it as a "placeholder process" for more specific EIGRP process
definitions. I.e. when you are configuring EIGRP "normally", you would
configure it like this:

router eigrp 1515
 no auto-summary
 network ...
 address-family ipv4 vrf SomeVPN
  autonomous-system 100
  no auto-summary
  network ...
!

Now, in a case when you have EIGRP running only in VRF - you still
need to create a process that can run in a global table and that can
lead to some errors. The good thing with named configurations is that
they don't actually create process, but rather create routing process
definitions, that are then activate per process. Same config as above:

router eigrp OurEIGRP
 address-family ipv4 1515
  no auto-summary
  network ...
 address-family ipv4 vrf SomeVPN 100
  no auto-summary
  network ...
!

There are several other changes - passive-interface is all but gone
and is replaced by more robust control from the routing process
itself, it supports multi-topology routing (MTR), etc.

Personally, I have never used this, but I like the idea behind it...

> My old boxes (25xx & 26xx) do not support this approach - although I am running
> 12.4T. What about the routers on R&S v4 lab? Do they support it?

You will need a device with IOS 15 to test this, or some bigger box...
By looking at the versions in which this was introduces, I think you
can give it a go in a 7200 image in Dynamips (both SB and SRB are
supported by 7200).

--
Marko Milivojevic - CCIE #18427
Senior Technical Instructor - IPexpert
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