From: Mohamed El Henawy (m.henawy@link.net)
Date: Thu Sep 18 2008 - 03:50:59 ART
Hello Narbik , Igor ,
Thank you so much for your detailed reply
Regards ,
----- Original Message -----
From: Narbik Kocharians
To: Igor M.
Cc: ccielab@groupstudy.com ; Mohamed El Henawy
Sent: Wednesday, September 17, 2008 3:37 AM
Subject: Re: EIGRP / default-information allowed out
Mohamed,
There are few ways to inject default route into an Eigrp routing domain,
here are some of the ways:
1. ip route 0.0.0.0 0.0.0.0 null0
Router eigrp 100
Network 0.0.0.0
In this case the default route will show as an internal Eigrp route.
2. Ip route 0.0.0.0 0.0.0.0 null0
Router eigrp 100
Redistribute static
In this case the default route will show as an external Eigrp route "EX".
3. under a given interface:
Ip summary-address eigrp 100 0.0.0.0 0.0.0.0
In this case the default route will show as an internal Eigrp route.
4. IP default-network 1.0.0.0 (The network can be any network, but must be a
classful network and NOT a subnet, a loopback interface or any interface)
Router eigrp 100
Network 1.0.0.0
Let's say the neighboring router is configured with option number 4, your
local router's routing table will show network 1.0.0.0 as a candidate default
as follows:
D* 1.0.0.0/8
Note the "*" after the letter D.
Now let's say your router need to have access to network 1.0.0.0, but it
does not want to use it as a candidate default, in this case your router (R1)
should be configured as follows:
Router eigrp 100
No default-information allowed in
After the above configuration, if you check your routing table it should
look like the following:
D 1.0.0.0/8
Note the "*" is gone and network 1.0.0.0 is no longer used as the candidate
default.
On Tue, Sep 16, 2008 at 5:35 PM, Igor M. <imanassypov@rogers.com> wrote:
Gateways of last resort selected using the ip default-network
command are propagated differently depending on which routing protocol
is propagating the default route. For IGRP and EIGRP to propagate the
route, the network specified by the ip default-network command
must be known to IGRP or EIGRP. This means the network must be an IGRP-
or EIGRP-derived network in the routing table, or the static route used
to generate the route to the network must be redistributed into IGRP or
EIGRP, or advertised into these protocols using the network command.
----------------------
I.M., M.Eng. P.Eng.
Network Architect
CI Investments
----------------------
--- On Wed, 9/17/08, Mohamed El Henawy <m.henawy@link.net> wrote:
From: Mohamed El Henawy <m.henawy@link.net>
Subject: Re: EIGRP / default-information allowed out
To: "Igor M." <imanassypov@rogers.com>, ccielab@groupstudy.com
Received: Wednesday, September 17, 2008, 6:21 PM
i think this one is on OSPF only
R5(config-router)#default-information ?
allowed Allow default information
in Accept default routing information
out Output default routing information
Mohamed
----- Original Message -----
From: Igor M.
To: ccielab@groupstudy.com ; Mohamed El Henawy
Sent: Tuesday, September 16, 2008 11:37 PM
Subject: Re: EIGRP / default-information allowed out
you need 'default-information originate' under your eigrp process
----------------------
I.M., M.Eng. P.Eng.
Network Architect
CI Investments
----------------------
--- On Wed, 9/17/08, Mohamed El Henawy <m.henawy@link.net> wrote:
From: Mohamed El Henawy <m.henawy@link.net>
Subject: EIGRP / default-information allowed out
To: ccielab@groupstudy.com
Received: Wednesday, September 17, 2008, 5:02 PM
Hello Guys,i have a question . i was doing the technology lab for eigrp
and
came across ip default network commandmy question is , is there anyway to
advertise the default route to other neighbors by using the above command
with this one default-information allowed out ? instead of using
redistrbute static in the eigrp ?i tried but didnt workRegards, Blogs and
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--
Narbik Kocharians
CCSI#30832, CCIE# 12410 (R&S, SP, Security)
www.MicronicsTraining
www.Net-Workbooks.com
Sr. Technical Instructor
Blogs and organic groups at http://www.ccie.net
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