From: Sachin D (networker.ccie@gmail.com)
Date: Wed Sep 17 2008 - 10:58:11 ART
Hello Narbik,
In point 1 to originate default information, you originated default route
using network command,
I thought network command is only used to send updates to the interfaces in
the specified networks. If you do not specify the network of an interface,
the interface will not be advertised in any EIGRP update.
But here you have advertised the static route using the network command can
you please explain the behavior how the static is being advertised
It works, But when i tried pointing some dummy subnet 100.0.0.0/24 towards
Null0 and advertised it using "network 0.0.0.0" it is not advertised. But
when I used "network 100.0.0.0 0.0.0.255". It got advertised
If it is pointed towards any physical interface neither of them work. It
seems something wrong with the Null0 Interface.
Can you please comment on it
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.*
Regards
Sachin
On Wed, Sep 17, 2008 at 7:07 AM, Narbik Kocharians <narbikk@gmail.com>wrote:
> 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
> > organic groups at
> >
> >
> >
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> --
> Narbik Kocharians
> CCSI#30832, CCIE# 12410 (R&S, SP, Security)
> www.MicronicsTraining
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>
>
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